M. Kawasaki

High Throughput Oxide Lattice Engineering by Parallel Laser Molecular Beam Epitaxy and Concurrent X-ray Diffraction (2005)

We show that the $e^++e^-$ decay of a light scalar boson of mass 1-10 MeV may account for the fluxes of 511 keV gamma ray observed by SPI/INTEGRAL. We argue that candidates of such a light scalar...

Ohtani, M., Lippmaa, M., Ohnishi, T., Kawasaki, M.

A novel laser molecular beam epitaxy (LMBE) system for the fabrication of atomically controlled oxides superlattices and an x-ray diffractometer that measures spatially-resolved x-ray diffraction...

Evolution of ferromagnetic circular dichroism coincident with magnetization and anomalous Hall effect in Co-doped rutile TiO2 (2005)

Toyosaki, H., Fukumura, T., Yamada, Y., Kawasaki, M.

Magnetic circular dichroism (MCD) of rutile Ti1-xCoxO2-d is systematically examined with various x and d to reveal a phase diagram for the appearance of ferromagnetism at higher carrier concentration...

The band structure and Fermi surface of La$_{0.6}$Sr$_{0.4}$MnO$_{3}$ thin films studied by in-situ angle-resolved photoemission spectroscopy (2005)

Chikamatsu, A., Wadati, H., Kumigashira, H., Oshima, M., Fujimori, A., Hamada, N., ...

We have performed an in situ angle-resolved photoemission spectroscopy (ARPES) on single-crystal surfaces of La$_{0.6}$Sr$_{0.4}$MnO$_{3}$ (LSMO) thin films grown on SrTiO$_{3}$ (001) substrates by...

Exciton-optical-phonon coupling: comparison with experiments for ZnO quantum wells (2005)

Makino, T., Segawa, Y., Kawasaki, M.

The temperature-dependent linewidths of excitons in ZnO quantum wells were studied by measuring absorption spectra from 5 K to room temperature. We deduced experimentally the...

Andrearczyk, T., Jaroszynski, J., Grabecki, G., Dietl, T., Fukumura, T., Kawasaki, M.

Effects of spin-orbit coupling and s-d exchange interaction are probed by magnetoresistance measurements carried out down to 50 mK on ZnO and Zn_{1-x}Mn_{x}O with x = 3 and 7%. The films were...

Measurement of regional distribution of atmospheric NO2 and aerosol particles with flashlight long-path optical monitoring (2005)

Fuqi, S, Kuze, H, Yoshii, Y, Nemoto, M, Takeuchi, N, Kimura, T, ...

Photodissociation dynamics of CH3CFCl2 and CDCl3 at 205-209 nm (2005)

Mashino, M, Yamada, H, Sugita, A, Kawasaki, M

Enhanced molecular fluorescence near thick Ag island film of large pseudotabular nanoparticles (2005)

Kawasaki, M, Mine, S

Laser fragmentation of water-suspended gold flakes via spherical submicroparticles to fine nanoparticles (2005)

Kawasaki, M, Masuda, K

Highly efficient surface-enhanced fluorescence on Ag island film of large pseudotabular nanoparticles (2005)

Kawasaki, M, Mine, S

Rate constants of the reaction of NO3 with CH3I measured with use of cavity ring-down spectroscopy (2005)

Nakano, Y, Ishiwata, T, Kawasaki, M

Direct observation of adduct formation of alkyl and aromatic iodides with Cl atoms using cavity ring-down spectroscopy (2005)

Enami, S, Yamanaka, T, Hashimoto, S, Kawasaki, M, Tonokura, K

Manifestation of Correlation Effects in the photoemission spectra of Ca$_{1-x}$Sr$_x$RuO$_3$ (2004)

Takizawa, M., Toyota, D., Wadati, H., Chikamatsu, A., Kumigashira, H., Fujimori, A., ...

We have measured soft x-ray photoemission and O 1{\it s} x-ray absorption spectra of Ca$_{1-x}$Sr$_x$RuO$_3$ thin films prepared {\it in situ}. The coherent and incoherent parts have been identified...

Room-temperature stimulated emission from ZnO multiple quantum wells grown on lattice-matched substrates (2004)

Makino, T., Segawa, Y., Kawasaki, M., Koinuma, H.

The optical properties of ZnO quantum wells, which have potential application of short-wavelength semiconductor laser utilizing a high-density excitonic effect, were investigated. Stimulated emission...

Hysteretic current-voltage characteristics and resistance switching at an epitaxial oxide Schottky junction SrRuO$_{3}$/SrTi$_{0.99}$Nb$_{0.01}$O$_{3}$ (2004)

Fujii, T., Kawasaki, M., Sawa, A., Akoh, H., Kawazoe, Y., Tokura, Y.

Transport properties have been studied for a perovskite heterojunction consisting of SrRuO$_{3}$ (SRO) film epitaxially grown on SrTi$_{0.99}$Nb$_{0.01}$O$_{3}$ (Nb:STO) substrate. The SRO/Nb:STO...

Temperature-dependent soft x-ray photoemission and absorption studies of charge disproportionation in La$_{1-x}$Sr$_x$FeO$_3$ (2004)

Wadati, H., Chikamatsu, A., Hashimoto, R., Takizawa, M., Kumigashira, H., Fujimori, A., ...

We have measured the temperature dependence of the photoemission and x-ray absorption spectra of La$_{1-x}$Sr$_x$FeO$_3$ (LSFO) epitaxial thin films with $x=0.67$, where charge disproportionation...

Optical Properties of Excitons in ZnO-based Quantum Well Heterostructures (2004)

Makino, T., Segawa, Y., Kawasaki, M., Koinuma, H.

Recently the developments in the field of II-VI-oxides have been spectacular. Various epitaxial methods has been used to grow epitaxial ZnO layers. Not only epilayers but also sufficiently...

Hysteretic current-voltage characteristics and resistance switching at a rectifying Ti/Pr$_{0.7}$Ca$_{0.3}$MnO$_{3}$ interface (2004)

Sawa, A., Fujii, T., Kawasaki, M., Tokura, Y.

We have characterized the vertical transport properties of epitaxial layered structures composed of Pr$_{0.7}$Ca$_{0.3}$MnO$_{3}$ (PCMO) sandwiched between SrRuO$_{3}$ (SRO) bottom electrode and...

Early reionization by decaying particles and cosmic microwave background radiation (2004)

In situ photoemission study on atomically-controlled La$_{1-x}$Sr$_x$MnO$_3$ thin films: Composition dependence of the electronic structure (2004)

We study the reionization scenario in which ionizing UV photons emitted from decaying particle, in addition to usual contributions from stars and quasars, ionize the universe. It is found that the...

Horiba, K., Chikamatsu, A., Kumigashira, H., Oshima, M., Nakagawa, N., Lippmaa, M., ...

We have investigated change in the electronic structures of atomically-controlled La$_{1-x}$Sr$_x$MnO$_3$ (LSMO) thin films as a function of hole-doping level ($x$) in terms of {\it in situ}...

Gallium concentration dependence of room-temperature near-bandedge luminescence in n-type ZnO:Ga (2004)

Makino, T., Segawa, Y., Yoshida, S., Tsukazaki, A., Ohtomo, A., Kawasaki, M.

We investigated the optical properties of epitaxial \textit{n}-type ZnO films grown on lattice-matched ScAlMgO$_4$ substrates. As the Ga doping concentration increased up to $6 \times 10^{20}$...

Nature of Well-Screened State in Hard X-ray Mn 2$p$ Core-Level Photoemission of La$_{1-x}$Sr$_x$MnO$_3$ Films (2004)

Horiba, K., Taguchi, M., Chainani, A., Takata, Y., Ikenaga, E., Namatame, H., ...

Using hard x-ray (HX ; $h\nu$ = 5.95 keV) synchrotron photoemission spectroscopy (PES), we study the intrinsic electronic structure of La$_{1-x}$Sr$_x$MnO$_3$ (LSMO) thin films. Comparison of Mn 2$p$...

Hole-doping-induced changes in the electronic structure of La$_{1-x}$Sr$_x$FeO$_3$ : soft x-ray photoemission and absorption study of epitaxial thin films (2004)

Wadati, H., Kobayashi, D., Kumigashira, H., Okazaki, K., Mizokawa, T., Fujimori, A., ...

We have studied the electronic structure of epitaxially grown thin films of La$_{1-x}$Sr$_x$FeO$_3$ by {\it in-situ} photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS)...

Hydrogen atom formation from the photodissociation of water ice at 193 nm (2004)

Yabushita, A, Hashikawa, Y, Ikeda, A, Kawasaki, M, Tachikawa, H

Formation of iodine monoxide radical from the reaction of CH2I with O-2 (2004)

Enami, S, Ueda, J, Goto, M, Nakano, Y, Aloisio, S, Hashimoto, S, ...

The rate constant ratio k(1)(Cl+C2H6)/k(2)(Cl+CH4) from 250 to 700 K (2004)

Kaiser, EW, Wallington, TJ, Hashikawa, Y, Kawasaki, M

Gas phase UV and IR absorption spectra of CxF2x+1CHO (x=1-4) (2004)

Hashikawa, Y, Kawasaki, M, Waterland, RL, Hurley, MD, Ball, JC, Wallington, TJ, ...

Temperature-dependent absorption cross sections of ozone in the Wulf-Chappuis band at 759-768 nm (2004)

Enami, S, Ueda, J, Nakano, Y, Hashimoto, S, Kawasaki, M

Equilibrium constants of the reaction of Cl with O-2 in the formation of ClOO (2004)

Suma, K, Sumiyoshi, Y, Endo, Y, Enami, S, Aloisio, S, Hashimoto, S, ...

Photodissociation of N2O4 adsorbed on amorphous and crystalline water-ice films (2004)

Yabushita, A, Inoue, Y, Senga, T, Kawasaki, M, Sata, S

Reactions of Cl atoms with dimethyl sulfide: A theoretical calculation and an experimental study with cavity ring-down spectroscopy (2004)

Enami, S, Nakano, Y, Hashimoto, S, Kawasaki, M, Aloisio, S, Francisco, JS

Atmospheric chemistry of CH3CHF2 (R-152a): mechanism of the CH3CF2O2+HO2 reaction (2004)

Hashikawa, Y, Kawasaki, M, Andersen, MPS, Hurley, MD, Wallington, TJ

High efficiency photocurrent generation by two-dimensional mixed J-aggregates of cyanine dyes (2004)

Kawasaki, M, Aoyama, S

Observation of stable mixed alkanethiolate-chloride adlayer on Ag(111): structural correlation with pure alkanethiolate monolayers (2004)

Kawasaki, M, Nagayama, H

Hydrogen atom formation from the photodissociation of water ice at 193 nm (2004)

Yabushita, A, Hashikawa, Y, Ikeda, A, Kawasaki, M, Tachikawa, H

Photodissociation of water dimer at 205 nm (2004)

Kawasaki, M, Sugita, A, Ramos, C, Matsumi, Y, Tachikawa, H

Scaling of the anomalous Hall effect in Sr$_{1-x}$Ca$_x$RuO$_3$ (2003)

Mathieu, R., Asamitsu, A., Yamada, H., Takahashi, K. S., Kawasaki, M., Fang, Z., ...

The anomalous Hall effect (AHE) of ferromagnetic thin films of Sr$_{1-x}$Ca$_{x}$RuO$_3$ (0 $\leq x \leq$ 0.4) is studied as a function of $x$ and temperature $T$. As $x$ increases, both the...

Stability of a cosmological model with dynamical cancellation of vacuum energy (2003)

Dolgov, A. D., Kawasaki, M.

The stability of cosmological solutions in the recently suggested specific mechanism of dynamical compensation of vacuum energy is studied. It is found that the solutions in the original version lead...

Anomalous Hall Effect and Magnetic Monopoles in Momentum-Space (2003)

Fang, Z., Nagaosa, N., Takahashi, K. S., Asamitsu, A., Mathieu, R., Ogasawara, T., ...

Efforts to find the magnetic monopole in real space have been made in cosmic rays and in accelerators, but up to now there is no firm evidence for its existence due to the very heavy mass $\sim...

Partially ionizing the universe by decaying particles (2003)

Kasuya, S., Kawasaki, M., Sugiyama, Naoshi

We show that UV photons produced by decaying particles can partially reionize the universe and explain the large optical depth observed by Wilkinson Microwave Anisotropy Probe. Together with UV...

Modeling and simulation of polycrystalline ZnO thin-film transistors (2003)

Hossain, Faruque M., Nishii, J., Takagi, S., Ohtomo, A., Fukumura, T., Fujioka, H., ...

Thin film transistors (TFTs) made of transparent channel semiconductors such as ZnO are of great technological importance, because their insensitivity to visible light makes device structures simple....

Resonant exciton second-harmonic generation in self-assembled ZnO microcrystallite thin films (2003)

Zhang, X. Q., Tang, Zi-Kang, Kawasaki, M., Ohtomo, A., Koinuma, H.

Second-harmonic generation has been studied for fundamental wavelengths from 720 to 1100 nm on high-quality ZnO thin films deposited on sapphire substrates by laser molecular beam epitaxy. The...

Carrier induced ferromagnetism in room temperature ferromagnetic semiconductor rutile TiO2 doped with Co (2003)

Toyosaki, H., Fukumura, T., Yamada, Y., Nakajima, K., Chikyow, T., Hasegawa, T., ...

A ferromagnetic semiconductor, rutile (Ti,Co)O2, exhibits anomalous Hall effect at room temperature. Strong dependence of the anomalous Hall effect, as well as the magneto-optic response, on the...

Realistic cosmological model with dynamical cancellation of vacuum energy (2003)

Dolgov, A. D., Kawasaki, M.

We propose a model with a compensating scalar field whose back reaction to the cosmological curvature cancels possible vacuum energy density down to the terms of the order of the time dependent...

Can modified gravity explain accelerated cosmic expansion? (2003)

Dolgov, A. D., Kawasaki, M.

We show that the recently suggested explanations of cosmic acceleration by the modification of gravity at small curvature suffer violent instabilities and strongly disagree with the known properties...

Field-Effect Transistor on SrTiO3 with sputtered Al2O3 Gate Insulator (2003)

Ueno, K., Inoue, I. H., Akoh, H., Kawasaki, M., Tokura, Y., Takagi, H.

A field-effect transistor that employs a perovskite-type SrTiO3 single crystal as the semiconducting channel is revealed to function as n-type accumulation-mode device with characteristics similar to...

Exploration of oxide-based diluted magnetic semiconductors toward transparent spintronics (2003)

Fukumura, T., Yamada, Y., Toyosaki, H., Hasegawa, T., Koinuma, H., Kawasaki, M.

A review is given for the recent progress of research in the field of oxide-based diluted magnetic semiconductor (DMS), which was triggered by combinatorial discovery of transparent ferromagnet. The...

MSSM curvaton in the gauge-mediated SUSY breaking (2003)

Inflation with a running spectral index in supergravity (2003)

We study the curvaton scenario using the MSSM flat directions in the gauge-mediated SUSY breaking model. We find that the fluctuations in the both radial and phase directions can be responsible for...

Kawasaki, M., Yamaguchi, Masahide, Yokoyama, Jun'ichi

The first year Wilkinson Microwave Anisotropy Probe data favors primordial adiabatic fluctuation with a running spectral index with $\ns >1$ on a large scale and $\ns 1$ (hybrid inflation) or $\ns

The Earliest Epoch of Reionisation in the Standard $\Lambda$CDM Model (2003)

Fukugita, M., Kawasaki, M.

We show that the earliest possible reionisation of the Universe is approximately at $z\simeq 13.5$ and the optical depth is $\tau\simeq 0.17$ in the conventionally accepted $\Lambda$ cold dark matter...

Affleck-Dine mechanism with negative thermal logarithmic potential (2003)

Laser-induced conversion of noble metal-island films to dense monolayers of spherical nanoparticles (2003)

We investigate whether the Affleck-Dine (AD) mechanism works when the contribution of the two-loop thermal correction to the potential is negative in the gauge-mediated supersymmetry breaking models....

Kawasaki, M, Hori, M

Photolysis of atmospheric ozone in the ultraviolet region (2003)

Matsumi, Y, Kawasaki, M

Ultraviolet photodissociation dynamics of Cl-2 and CFCl3 adsorbed on water ice surfaces (2003)

Yabushita, A, Kawasaki, M, Sato, S

Electric properties of self-assembled monolayers of helical peptides by scanning tunneling spectroscopy (2003)

Kitagawa, K, Morita, T, Kawasaki, M, Kimura, S

Temperature and pressure dependence study of the reaction of IO radicals with dimethyl sulfide by cavity ring-down laser spectroscopy (2003)

Nakano, Y, Enami, S, Nakamichi, S, Aloisio, S, Hashimoto, S, Kawasaki, M

Magneto-Optical Spectroscopy of Anatase TiO2 Doped with Co (2002)

Fukumura, T., Yamada, Y., Tamura, K., Nakajima, K., Aoyama, T., Tsukazaki, A., ...

Magneto-optical spectroscopy of a transparent ferromagnetic semiconductor, anatase TiO2 doped with Co, is carried out at room temperature. A large magneto-optical response with ferromagnetic field...

Remarks on the Cosmic Density of Degenerate Neutrinos (2002)

Ichikawa, Kazuhide, Kawasaki, M.

We re-investigate the evolution of the strongly degenerate neutrinos in the early universe. With the larger degeneracy, the neutrino number freezes at higher temperatures because the neutrino...

I-balls (2002)

Excited state dynamics of Cl2O in the near ultraviolet (2002)

We find that there exists a soliton-like solution ``I-ball'' in theories of a real scalar field if the scalar potential satisfies appropriate conditions. Although the I-ball does not have any...

Aures, R, Gericke, KH, Maul, C, Trott-Kriegeskorte, G, Kawasaki, M, Nakano, Y

Dissociative ionization of ICl studied by ion imaging spectroscopy (2002)

Yamada, H, Taniguchi, N, Kawasaki, M, Matsumi, Y, Gordon, RJ

Large lepton asymmetry from Q-balls (2002)

Kawasaki, M., Takahashi, Fuminobu, Yamaguchi, Masahide

We propose a scenario which can explain large lepton asymmetry and small baryon asymmetry simultaneously. Large lepton asymmetry is generated through Affleck-Dine (AD) mechanism and almost all the...

Constraints on the Star Formation Rate from Supernova Relic Neutrino Observations (2002)

Fukugita, M., Kawasaki, M.

We discuss the implication of the observation of supernova relic neutrinos on the study of the star formation rate (SFR) in galaxies. The limit recently obtained at Super-Kamiokande (SK) is already...

Constraining the variation of the coupling constants with big bang nucleosynthesis (2002)

Ichikawa, Kazuhide, Kawasaki, M.

We consider the possibility of the coupling constants of the $SU(3)\times SU(2)\times U(1)$ gauge interactions at the time of big bang nucleosynthesis having taken different values from what we...

Energy Distribution of the Fragments Produced by Photodissociation of CS2 at 193 nm, (2002)

Yang,S. C., Freedman,A., Kawasaki,M., Bersohn,R.

Photodissociation of small molecules in the gas phase (2002)

Kawasaki, M, Bersohn, R

Photodissociation of chlorine molecules adsorbed on amorphous and crystalline water ice films (2002)

Yabushita, A, Inoue, Y, Senga, T, Kawasaki, M, Sato, S

Excited state dynamics of Cl2O in the near ultraviolet (2002)

Aures, R, Gericke, KH, Maul, C, Trott-Kriegeskorte, G, Kawasaki, M, Nakano, Y

Isotope O-18/O-16 ratio measurements of water vapor by use of the 950-nm wavelength region with cavity ring-down and photoacoustic spectroscopic techniques (2002)

Samura, K, Hashimoto, S, Kawasaki, M, Hayashida, A, Kagi, E, Ishiwata, T, ...

Atmospheric chemistry of HFE-7500 [n-C3F7CF(OC2H5)CF(CF3)(2)]: Reaction with OH radicals and Cl atoms and atmospheric fate of n-C3F7CF(OCHO center dot)CF(CF3)(2) and n-C3F7CF(OCH2CH2O center dot)CF(CF3)(2) radicals (2002)

Goto, M, Inoue, Y, Kawasaki, M, Guschin, AG, Molina, LT, Molina, MJ, ...

Atmospheric chemistry of CH2FOCH2F: Reaction with Cl atoms and atmospheric fate of CH2FOCHFO center dot radicals (2002)

Goto, M, Kawasaki, M, Wallington, TJ, Hurley, MD, Sharratt, AP

Quantum yields for production of O(D-1) in the ultraviolet photolysis of ozone: Recommendation based on evaluation of laboratory data (2002)

Matsumi, Y, Comes, FJ, Hancock, G, Hofzumahaus, A, Hynes, AJ, Kawasaki, M, ...

Solubility equilibria and thermodynamic functions of two-dimensional J-aggregate of pseudoisocyanine organized on model AgX surface (2002)

Kawasaki, M

Cavity ring-down study of the visible absorption spectrum of the phenyl radical and kinetics of its reactions with Cl, Br, Cl-2, and O-2 (2002)

Tonokura, K, Norikane, Y, Koshi, M, Nakano, Y, Nakamichi, S, Goto, M, ...

Kinetics and mechanism of the gas phase reaction of Cl atoms and OH radicals with bromobenzene (2002)

Nakano, Y, Kawasaki, M, Ponomarev, DA, Hurley, MD, Wallington, TJ

Dissociative ionization of ICl studied by ion imaging spectroscopy (2002)

Yamada, H, Taniguchi, N, Kawasaki, M, Matsumi, Y, Gordon, RJ

Mechanism of the reaction of OH radicals with acetone and acetaldehyde at 251 and 296 K (2002)

Tyndall, GRS, Orlando, JJ, Wallington, TJ, Hurley, MD, Goto, M, Kawasaki, M

Supersymmetric topological inflation model (2001)

Kawasaki, M., Yamaguchi, Masahide

We propose a topological inflation model in supergravity. In this model, the vacuum expectation value (VEV) of a scalar field takes a value much larger than the gravitational scale $M_{G} \simeq 2.4...

Observation of a He-6(Lambda Lambda) double hypernucleus (2001)

Takahashi, H, Ahn, JK, Akikawa, H, Aoki, S, Arai, K, Bahk, SY, ...

On the Moduli Problem and Baryogenesis in Gauge-mediated SUSY Breaking Models (2001)

Q-ball formation: Obstacle to Affleck-Dine baryogenesis in the gauge-mediated SUSY breaking ? (2001)

We investigate whether the Affleck-Dine mechanism can produce sufficient baryon number of the universe in the gauge-mediated SUSY breaking models, while evading the cosmological moduli problem by...

Radiative decay of a massive particle and the nonthermal process in primordial nucleosynthesis (2001)

We consider the Affleck-Dine baryogenesis comprehensively in the minimal supersymmetric standard model with gauge-mediated supersymmetry breaking. Considering the high temperature effects, we see...

Kawasaki, M, Kohri, K, Moroi, T

Above-threshold dissociative ionization in the intermediate intensity regime (2001)

Unny, S, Du, Y, Zhu, LC, Gordon, RJ, Sugita, A, Kawasaki, M, ...

Controlling the branching ratio of the photodissociation of aligned Cl-2 at 404 nm (2001)

Sugita, A, Suto, K, Kawasaki, M, Matsumi, Y

Atmospheric degradation mechanism of CF3OCF2H (2001)

Inoue, Y, Kawasaki, M, Wallington, TJ, Hurley, MD

Direct voltammetric observation of reversible and irreversible oxidations of two-dimensional J-aggregates of cyanine dye (2001)

Kawasaki, M, Sato, T

Kinetic and product study of the Cl-initiated oxidation of 1,2,3-trichloropropane (CH2CICHCICH2Cl) (2001)

Voicu, I, Barnes, I, Becker, KH, Wallington, TJ, Inoue, Y, Kawasaki, M

Control of photodissociation by alignment, bleaching and optical phase (2001)

Kawasaki, M

Photodissociation of N2O4 multilayer adsorbed on a polycrystalline Au substrate (2001)

Senga, T, Yabushita, A, Inoue, Y, Kawasaki, M, Sato, S

Above-threshold effects in the photodissociation and photoionization of iodobenzene (2001)

Unny, S, Du, Y, Zhu, LC, Truhins, K, Gordon, RJ, Sugita, A, ...

Spectroscopic properties of noble metal nano-particles covered with J-aggregates of cyanine dye (2001)

Sato, T, Tsugawa, F, Tomita, T, Kawasaki, M

Observation of highly ordered 3 x 4 phase of ethanethiol self-assembled monolayer on Au(111) (2001)

Kawasaki, M, Nagayama, H

Atmospheric oxidation mechanism of methyl pivalate, (CH3)(3)CC(O)OCH3 (2001)

Wallington, TJ, Ninomiya, Y, Mashino, M, Kawasaki, M, Orkin, VL, Huie, RE, ...

Above-threshold dissociative ionization in the intermediate intensity regime (2001)

Unny, S, Du, Y, Zhu, LC, Gordon, RJ, Sugita, A, Kawasaki, M, ...

Cavity ring-down spectroscopic study of the kinetics of the reactions of FCO radicals with O-2 and NO at 295 K (2001)

Ninomiya, Y, Goto, M, Hashimoto, S, Kawasaki, M, Wallington, TJ

Extreme high rotational excitation of ClO (2001)

Aures, R, Gericke, KH, Kawasaki, M, Maul, C, Nakano, Y, Trott-Kriegeskore, G, ...

Direct imaging of Guinier-Preston zones by high-angle annular detector dark-field scanning transmission electron microscopy (2001)

Konno, J, Kawasaki, M, Hiraga, K

We report atomic resolution imaging of Cu-planar precipitates in aged Al-Cu alloys, known as Guinier-Preston (GP) zones, by high-angle annular detector dark-field scanning transmission electron...

Temperature dependence of near ultraviolet photoluminescence in ZnO/(Mg, Zn)O multiple quantum wells. (2001)

Makino, T., Tuan, N. T., Sun, H. D., Chia, C. H., Segawa, Y., Kawasaki, M., ...

We report on temperature dependence of excitonic photoluminescence (PL) from ZnO/(Mg, Zn)O multiple quantum wells (MQWs). Two kinds of MQWs having different barrier heights grown by laser...

Radiative decay of a massive particle and the non-thermal process in primordial nucleosynthesis (2000)

Kawasaki, M., Kohri, K., Moroi, Takeo

We consider the effects on big bang nucleosynthesis (BBN) of the radiative decay of a long-lived massive particle. If high-energy photons are emitted after the BBN epoch ($t \sim 1 - 10^3$ sec), they...

Natural Chaotic Inflation in Supergravity and Leptogenesis (2000)

Kawasaki, M., Yamaguchi, Masahide, Yanagida, T.

We comprehensively investigate a chaotic inflation model proposed recently in the framework of supergravity. In this model, the form of K\"ahler potential is determined by a symmetry, that is, the...

New type of stable Q balls in the gauge-mediated supersymmetry breaking (2000)

Topological Inflation in Supergravity (2000)

We obtain a new type of a stable Q ball in the context of gauge-mediated supersymmetry breaking in minimal supersymmetric standard model. It is so-called gravity-mediation type of Q ball, but stable...

Kawasaki, M., Sakai, Nobuyuki, Yamaguchi, Masahide, Yanagida, T.

We investigate a topological inflation model in supergravity. By means of numerical simulations, it is confirmed that topological inflation can take place in supergravity. We also show that the...

Natural Chaotic Inflation in Supergravity (2000)

Kawasaki, M., Yamaguchi, Masahide, Yanagida, T.

We propose a chaotic inflation model in supergravity. In the model the K\"ahler potential has a Nambu-Goldstone-like shift symmetry of the inflaton chiral multiplet which ensures the flatness of the...

Effect of molecular bending on the photodissociation of OCS (2000)

Sugita, A, Mashino, M, Kawasaki, M, Matsumi, Y, Bersohn, R, Trott-Kriegeskorte, G, ...

Q-ball formation in the gravity-mediated SUSY breaking scenario (2000)

Double inflation in supergravity and the primordial black hole formation (2000)

We study the formation of Q-balls which are made of flat directions that appear in the supersymmetric extension of the standard model in the context of gravity-mediated supersymmetry breaking. The...

Kanazawa, Toshiyuki, Kawasaki, M., Yanagida, T.

We study a double inflation model (a hybrid inflation + a new inflation) in supergravity and discuss the formation of primordial black holes (PBHs) with mass \sim 10^{-20}-10^{5}M_{\odot}. We find...

Study of the Long Term Stability of two Anomalous X-ray Pulsars 4U 0142+61 and 1E 1048.1-5937 with ASCA (2000)

Paul, B., Kawasaki, M., Dotani, T., Nagase, F.

We present new observations of two anomalous X-ray pulsars (AXP) 4U 0142+61 and 1E 1048.1-5937 made in 1998 with the ASCA. The energy spectra of these two AXPs are found to consist of two components,...

MeV-scale Reheating Temperature and Thermalization of Neutrino Background (2000)

Kawasaki, M., Kohri, K., Sugiyama, Naoshi

The late-time entropy production by the massive particle decay induces the various cosmological effects in the early epoch and modify the standard scenario. We investigate the thermalization process...

Control of photofragment velocity anisotropy by optical alignment of CH3I (2000)

Sugita, A, Mashino, M, Kawasaki, M, Matsumi, Y, Gordon, RJ, Bersohn, R

Absence of self-averaging in the complex admittance for transport through random media (2000)

Kawasaki, M., Odagaki, T., Kehr, K. W.

This version is available at the following URL: http://prb.aps.org/

Atmospheric chemistry of n-C3F7OCH3: Reaction with OH radicals and Cl atoms and atmospheric fate of n-C3F7OCH2O((center dot)) radicals (2000)

Ninomiya, Y, Kawasaki, M, Guschin, A, Molina, LT, Molina, MJ, Wallington, TJ

Atmospheric chemistry of CF3CF=CF2: Kinetics and mechanism of its reactions with OH radicals, Cl atoms, and ozone (2000)

Mashino, M, Ninomiya, Y, Kawasaki, M, Wallington, TJ, Hurley, MD

Fabrication of two-dimensional J-aggregates on Au(111) covered with self-assembled cysteamine monolayer (2000)

Sato, T, Yamamoto, A, Kawasaki, M

Cavity ring-down study of BrO radicals: Kinetics of the Br+O-3 reaction and rate of relaxation of vibrationally excited BrO by collisions with N-2 and O-2 (2000)

Ninomiya, Y, Hashimoto, S, Kawasaki, M, Wallington, TJ

Adsorption states of NO2 over water-ice films formed on Au(111) (2000)

Sato, S, Yamaguchi, D, Nakagawa, K, Inoue, Y, Yabushita, A, Kawasaki, M

Cavity ring-down spectroscopy and relative rate study of reactions of HCO radicals with O-2, NO, NO2, and Cl-2 at 295 K (2000)

Ninomiya, Y, Goto, M, Hashimoto, S, Kagawa, Y, Yoshizawa, K, Kawasaki, M, ...

Controlled layering of two-dimensional J-aggregate of anionic cyanine dye on self-assembled cysteamine monolayer on Au(111) (2000)

Kawasaki, M, Sato, T, Yoshimoto, T

Control of photofragment velocity anisotropy by optical alignment of CH3I (2000)

Sugita, A, Mashino, M, Kawasaki, M, Matsumi, Y, Gordon, RJ, Bersohn, R

Photodissociation cross sections of N2O3 adsorbed on An(III) (2000)

Sato, S, Yamaguchi, D, Senga, T, Kawasaki, M

Rapid self-assembly of alkanethiol monolayers on sputter-grown Au(111) (2000)

Kawasaki, M, Sato, T, Tanaka, T, Takao, K

Effect of molecular bending on the photodissociation of OCS (2000)

Sugita, A, Mashino, M, Kawasaki, M, Matsumi, Y, Bersohn, R, Trott-Kriegeskorte, G, ...

Electron microscopy analysis of the boundary layer structure of SrTiO3 semiconducting ceramic (2000)

Kawasaki, M., Yoshioka, T., Sato, S., Nomura, T., Shiojiri, M.

In a boundary layer (BL) semiconducting SrTiO3-based ceramic condenser, the BL structure has been investigated using high-resolution field-emission scanning electron microscopy (FE-SEM) and...

Electron microscopy analysis of the boundary layer structure of SrTiO3 semiconducting ceramic (2000)

Kawasaki, M., Yoshioka, T., Sato, S., Nomura, T., Shiojiri, M.

In a boundary layer (BL) semiconducting SrTiO3-based ceramic condenser, the BL structure has been investigated using high-resolution field-emission scanning electron microscopy (FE-SEM) and...

Evolution of a global string network in a matter dominated universe (1999)

Yamaguchi, Masahide, Yokoyama, Jun'ichi, Kawasaki, M.

We evolve the network of global strings in the matter-dominated universe by means of numerical simulations. The existence of the scaling solution is confirmed as in the radiation-dominated universe...

Q-ball Formation through Affleck-Dine Mechanism (1999)

Double Inflation in Supergravity and the Large Scale Structure (1999)

We present the full nonlinear calculation of the formation of a Q-ball through the Affleck-Dine (AD) mechanism by numerical simulations. It is shown that large Q-balls are actually produced by the...

Kanazawa, Toshiyuki, Kawasaki, M., Sugiyama, Naoshi, Yanagida, T.

The cosmological implication of a double inflation model with hybrid + new inflations in supergravity is studied. The hybrid inflation drives an inflaton for new inflation close to the origin through...

Leptogenesis in Inflationary Universe (1999)

Asaka, T., Hamaguchi, K., Kawasaki, M., Yanagida, T.

We investigate the leptogenesis via decays of heavy Majorana neutrinos which are produced non-thermally in inflaton decays. We make a comprehensive study on the leptogenesis assuming various...

Initial condition for new inflation in supergravity (1999)

Asaka, T., Kawasaki, M., Yamaguchi, Masahide

We study the initial value problem of new inflation models in the scheme of supergravity. We find that an inflaton generally acquires a mass of the order of the Hubble parameter via gravitationally...

Leptogenesis in Inflaton Decay (1999)

Asaka, T., Hamaguchi, K., Kawasaki, M., Yanagida, T.

We study a leptogenesis via decays of heavy Majorana neutrinos produced non-thermally in inflaton decays. We find that this scenario is fully consistent with existing supersymmetric inflation models...

Cosmological Moduli Problem and Thermal Inflation Models (1999)

Asaka, T., Kawasaki, M.

In superstring theories, there exist various dilaton and modulus fields which masses are expected to be of the order of the gravitino mass $m_{3/2}$. These fields lead to serious cosmological...

Superheavy Dark Matter and Thermal Inflation (1999)

Asaka, T., Kawasaki, M., Yanagida, T.

The thermal inflation is the most plausible mechanism that solves the cosmological moduli problem naturally. We discuss relic abundance of superheavy particle $X$ in the presence of the thermal...

Remarks on Cosmic String Formation during Preheating on Lattice Simulations (1999)

Structure and chemistry of planar defects in bulk and thin film MoSi2 (1999)

We reconsider the formation of (global) cosmic strings during and after preheating by calculating the dynamics of a scalar field on both two- and three- dimensional lattices. We have found that there...

Inui, H, Hashimoto, T, Ito, K, Yamaguchi, M, Kawasaki, M

Interface structure analysis of SiC fibres reinforced SiC matrix composites by energy filtering TEM (1999)

Shibayama, Tamaki, Takahashi, Heishichiro, Kawasaki, M., Kohyama, Akira

Various criteria for environmental effects on microstructural evolution at interfaces of SiC fibres reinforced SiC matrix composites are proposed. Of interest is that degradation of the composite is...

Cosmological Constraints on Late-time Entropy Production (1998)

Kawasaki, M., Kohri, K., Sugiyama, Naoshi

We investigate cosmological effects concerning the late-time entropy production due to the decay of non-relativistic massive particles. The thermalization process of neutrinos after the entropy...

Evolution of Axionic Strings and Spectrum of Axions Radiated from Them (1998)

Yamaguchi, Masahide, Kawasaki, M., Yokoyama, Jun'ichi

Cosmological evolution of axionic strings is investigated by numerically solving field equations of a complex scalar field in 3+1 dimensions. It is shown that the global strings relax to the scaling...

R-Invariant Topological Inflation (1998)

Cosmological Moduli Problem and Oscillating Inflation in Gauge-Mediated Supersymmetry Breaking (1998)

We propose a topological inflation model in the framework of supergravity with $R$ invariance. This topological inflation model is not only free from the initial value problem of the inflaton field...

Asaka, T., Kawasaki, M., Yamaguchi, Masahide

We investigate cosmological moduli problem in the gauge-mediated supersymmetry breaking (GMSB). A mini-inflation (oscillating inflation) takes place when a scalar field corresponding to the flat...

Numerical analysis of formation and evolution of global strings in 2+1 dimensions (1998)

Yamaguchi, Masahide, Yokoyama, Jun'ichi, Kawasaki, M.

We simulate the formation and the evolution of global strings taking into account the expansion of the universe and the concomitant change of the effective potential, that is, the change from the...

Primordial Black Hole Formation in Supergravity (1998)

Radiative Decay of a Long-Lived Particle and Big-Bang Nucleosynthesis (1998)

We study a double inflation model (a preinflation + a new inflation) in supergravity and discuss the formation of primordial black holes which may be identified with massive compact halo objects...

Holtmann, Erich, Kawasaki, M., Kohri, K., Moroi, Takeo

The effects of radiatively decaying, long-lived particles on big-bang nucleosynthesis (BBN) are discussed. If high-energy photons are emitted after BBN, they may change the abundances of the light...

Observational Implications of Axionic Isocurvature Fluctuations (1998)

Kanazawa, Toshiyuki, Kawasaki, M., Sugiyama, Naoshi, Yanagida, T.

The axion is the most attractive candidate to solve the strong CP problem in QCD. If it exists, the inflationary universe produces axion fluctuations which are mixtures of isocurvature and adiabatic...

Topological Defects Formation after Inflation on Lattice Simulation (1998)

Isocurvature Fluctuations of the M-theory Axion in a Hybrid Inflation Model (1998)

We consider the formation of topological defects after inflation. In order to take into account the effects of the rescattering of fluctuations, we integrate the classical equation that describes the...

Kanazawa, Toshiyuki, Kawasaki, M., Sugiyama, Naoshi, Yanagida, T.

The M-theory, the strong-coupling heterotic string theory, presents various interesting new phenomenologies. The M-theory bulk axion is one of these. The decay constant in this context is estimated...

Spectrum of Background X-rays from Moduli Dark Matter (1998)

Asaka, T., Hashiba, J., Kawasaki, M., Yanagida, T.

We examine the $X$-ray spectrum from the decay of the dark-matter moduli with mass $\sim {\cal O}(100)$keV, in particular, paying attention to the line spectrum from the moduli trapped in the halo of...

Demonstration of atomic resolution Z-contrast imaging by a JEOL JEM-2010F scanning transmission electron microscope (1998)

James, E. M., Browning, N. D., Nicholls, A. W., Kawasaki, M., Xin, Y., Stemmer, S.

The collection of atomic resolution Z-contrast images, using an annular darkfield detector, has until recently been exclusively performed using the dedicated scanning transmission electron microscope...

Cosmological Moduli Problem in Gauge-mediated Supersymmetry Breaking Theories (1997)

Asaka, T., Hashiba, J., Kawasaki, M., Yanagida, T.

A generic class of string theories predicts the existence of light moduli fields, and they are expected to have masses $m_\phi$ comparable to the gravitino mass $m_{3/2}$ which is in a range of...

Primordial Black Hole Formation in a Double Inflation Model in Supergravity (1997)

Kawasaki, M., Sugiyama, N., Yanagida, T.

It has been recently pointed out that the initial value problem in new inflation models is naturally solved by supergravity effects if there exists a pre-inflation before the new inflation. We study...

Domain Wall Problem of Axion and Isocurvature Fluctuations in Chaotic Inflation Models (1997)

Kasuya, S., Kawasaki, M., Yanagida, T.

We study the domain wall problem of an axion in chaotic inflation models. We show that the production of domain walls does not occurs if the Peccei-Quinn scalar has a flat potential and its breaking...

Cosmological Constraint on the String Dilaton in Gauge-mediated Supersymmetry Breaking Theories (1997)

Hashiba, J., Kawasaki, M., Yanagida, T.

The dilaton field in string theories (if exists) is expected to have a mass of the order of the gravitino mass $m_{3/2}$ which is in a range of $10^{-2}$keV--1GeV in gauge-mediated supersymmetry...

Dynamical Tuning of the Initial Condition for New Inflation in Supergravity (1997)

Massive Decaying Tau Neutrino and Big Bang Nucleosynthesis (1997)

We point out that for a class of `new inflation' models in supergravity the required initial value of the inflaton field is dynamically set if there is another inflation (`pre-inflation') before the...

Kawasaki, M., Kohri, K., Sato, Katsuhiko

Comparing Big Bang Nucleosynthesis predictions with the light element abundances inferred from observational data, we can obtain the strong constraints on some neutrino properties, e.g. number of...

Can topological defects be formed during preheating ? (1997)

Cosmological constraints on particle physics (1997)

We study the dynamics of a scalar field \Phi with the potential g(|\Phi|^2-\eta^2)^2/2 (g=self-coupling constant, \eta=symmetry breaking scale) after inflation and make clear whether topological...

Sato, K, Kawasaki, M, Yokoyama, J

Are Isocurvature Fluctuations of the M-theory Axion Observable? (1997)

Solution to the cosmological axion problem in chaotic inflationary universe (1997)

Banks and Dine have recently shown that the M theory naturally accommodates the Peccei-Quinn axion. Since the decay constant $F_a$ of the axion is large as $F_a \simeq 10^{15}-10^{16}$GeV, the halo...

Kawasaki, M, Yanagida, T

Constraint on Cosmic Density of the String Moduli Field in Gauge-Mediated Supersymmetry-Breaking Theories (1997)

Big Bang Nucleosynthesis and Lepton Number Asymmetry in the Universe (1996)

We derive a constraint on the cosmic density of string moduli fields in gauge-mediated supersymmetry-breaking theories by requiring that photons emitted from the unstable moduli fields should not...

Kohri, K., Kawasaki, M., Sato, Katsuhiko

Recently it is reported that there is the discrepancy between big bang nucleosynthesis theory and observations (BBN crisis). We show that BBN predictions agree with the primordial abundances of light...

Cosmological Axion Problem in Chaotic Inflationary Universe (1996)

Kasuya, S., Kawasaki, M., Yanagida, T.

We investigate two cosmological axion problems (isocurvature fluctuations and domain-wall formation) in chaotic inflationary universe. It is believed that these problems are solved if potential for...

Gravitino Warm Dark Matter Motivated by the CDF $ee\gamma\gamma $ Event (1996)

Kawasaki, M., Sugiyama, N., Yanagida, T.

The $ee\gamma\gamma +\rlap/E_T$ event observed by the CDF at Fermilab is naturally explained by dynamically supersymmetry breaking models and suggests the presence of the light gravitino which can be...

Affleck-Dine Baryogenesis after Thermal Inflation (1996)

Stewart, E. D., Kawasaki, M., Yanagida, T.

We argue that an extension of the Minimal Supersymmetric Standard Model that gives rise to viable thermal inflation, and so does not suffer from a Polonyi/moduli problem, should contain right-handed...

Isocurvature and Adiabatic Fluctuations of Axion in Chaotic Inflation Models and Large Scale Structure (1995)

Kawasaki, M., Sugiyama, Naoshi, Yanagida, T.

In the chaotic inflation models, quantum fluctuations for axion fields lead to the overproduction of domain walls and too large isocurvature fluctuations which is inconsistent with the observations...

Can Decaying Particles Raise the Upperbound on the Peccei-Quinn Scale? (1995)

Kawasaki, M., Moroi, T., Yanagida, T.

We have reexamine the effect of entropy production on the cosmic axion density and find that the Peccei-Quinn scale $F_a$ larger than about $10^{15}$~GeV is not allowed even if large entropy is...

Constraint on the Reheating Temperature from the Decay of the Polonyi Field (1995)

Kawasaki, M., Moroi, T., Yanagida, T.

We study the Polonyi problem in the framework of no-scale type supergravity models. We show that the lightest superparticle (LSP) produced in the decay of the Polonyi field may contribute too much to...

Electromagnetic Cascade in the Early Universe and its Application to the Big-Bang Nucleosynthesis (1994)

Gravitino Decay into a Neutrino and a Sneutrino in the Inflationary Universe (1994)

We investigate the electromagnetic cascade initiated by injection of very high energy photons in the early Universe and calculate the cascade spectrum by solving a set of Boltzmann equations...

Gravitino Production in the Inflationary Universe and the Effects on Big-Bang Nucleosynthesis (1994)

Gravitino produced in the inflationary universe are studied. When the gravitino decays into a neutrino and a sneutrino, the emitted high energy neutrinos scatter off the background neutrinos and...

Gravitino Production in the Inflationary Universe and the Effects on Big-Bang Nucleosynthesis (1994)

Gravitino production and decay in the inflationary universe are reexanimed. Assuming that gravitino mainly decays into photon and photino, we have calculated the upperbound of the reheating...