Beck, C., Rowley, N., Papka, P., Courtin, S., Souza, F. A., Carlin, N., ...
An experimental overview of reactions induced by the stable, but weakly-bound nuclei 6Li, 7Li and 9Be, and by the exotic, halo nuclei 6He, 8B, 11Be and 17F on medium-mass targets, such as 58Ni, 59Co...
$\beta$-decay half-lives at finite temperatures for N=82 isotones (2009)
Using the finite temperature quasi-particle random phase approximation (FTQRPA) on the basis of finite temperature Skyrme-Hartree-Fock + BCS method, we study $\beta^-$-decay half-lives for even-even...
Subbarrier fusion reactions with dissipative couplings (2009)
Hagino, K., Yusa, S., Rowley, N.
Using the random matrix model, we discuss the effect of couplings to non-collective states on the penetrability of a one dimensional potential barrier. We show that these non-collective excitations...
Test of finite temperature RPA on a Lipkin model (2009)
We investigate the applicability of finite temperature random phase approximation (RPA) using a solvable Lipkin model. We show that the finite temperature RPA reproduces reasonably well the...
Quantum fluctuations in the shape of exotic nuclei (2009)
Yao, J. M., Meng, J., Ring, P., Li, Z. P., Hagino, K.
Quantum fluctuations concerning the shape of nuclei are treated within the framework of covariant density functional theory. Long range correlations beyond mean field are taken into account by...
Fission of heavy $\Lambda$ hypernuclei with the Skyrme-Hartree-Fock approach (2009)
Minato, F., Chiba, S., Hagino, K.
Fission-related phenomena of heavy $\Lambda$ hypernuclei are discussed with the constraint Skyrme-Hartree-Fock+BCS (SHF+BCS) method, in which a similar Skyrme-type interaction is employed also for...
Two-particle correlations in continuum dipole transitions in Borromean nuclei (2009)
Hagino, K., Sagawa, H., Nakamura, T., Shimoura, S.
We discuss the energy and angular distributions of two emitted neutrons from the dipole excitation of typical weakly-bound Borromean nuclei, $^{11}$Li and $^6$He. To this end, we use a three-body...
Deformation and weak decay of Lambda hypernuclei (2009)
Hagino, K., Win, Myaing Thi, Nakagawa, Y.
We use the self-consistent mean-field theory to discuss the ground state and decay properties of $\Lambda$ hypernuclei. We first discuss the deformation of $\Lambda$ hypernuclei using the...
Exploring fusion at extreme sub barrier energies with weakly bound nuclei (2009)
Shrivastava, A., Navin, A., Lemasson, A., Ramachandran, K., Nanal, V., Rejmund, M., ...
Results of measurement of residues formed in fusion of 6Li with 198Pt in the energy range of 0.68< E/$V_b$
Exploring fusion at extreme sub barrier energies with weakly bound nuclei (2009)
Shrivastava, A., Navin, A., Lemasson, A., Ramachandran, K., Nanal, V., Rejmund, M., ...
Results of measurement of residues formed in fusion of 6Li with 198Pt in the energy range of 0.68< E/$V_b$
Exploring fusion at extreme sub barrier energies with weakly bound nuclei (2009)
Shrivastava, A., Navin, A., Lemasson, A., Ramachandran, K., Nanal, V., Rejmund, M., ...
Results of measurement of residues formed in fusion of 6Li with 198Pt in the energy range of 0.68< E/$V_b$
Di-neutron correlation in light neutron-rich nuclei (2008)
Hagino, K., Sagawa, H., Schuck, P.
Using a three-body model with density-dependent contact interaction, we discuss the root mean square distance between the two valence neutrons in $^{11}$Li nuclues as a function of the center of mass...
Fusion at deep subbarrier energies: potential inversion revisited (2008)
For a single potential barrier, the barrier penetrability can be inverted based on the WKB approximation to yield the barrier thickness. We apply this method to heavy-ion fusion reactions at energies...
Deformation of Lambda hypernuclei (2008)
We study the deformation property of $\Lambda$ hypernuclei using the relativistic mean field (RMF) method. We find that $^{29}_{\Lambda}$Si and $^{13}_{\Lambda}$C hypernuclei have spherical shape as...
Strong dineutron correlation in 8He and 18C (2008)
Hagino, K., Takahashi, N., Sagawa, H.
We study the spatial structure of four valence neutrons in the ground state of $^8$He and $^{18}$C nuclei using a core+4$n$ model. For this purpose, we employ a density-dependent contact interaction...
Fission barriers in neutron-proton isospin plane for heavy neutron-rich nuclei (2008)
We discuss the sensitivity of fission barrier for heavy neutron-rich nuclei to fission paths in the two dimensional neutron-proton quadrupole plane. To this end, we use the constrained...
Effective pairing interactions with isospin density dependence (2008)
Margueron, J., Sagawa, H., Hagino, K.
We perform Hartree-Fock-Bogoliubov (HFB) calculations for semi-magic Calcium, Nickel, Tin and Lead isotopes and $N$=20, 28, 50 and 82 isotones using density-dependent pairing interactions recently...
Effective pairing interactions with isospin density dependence (2008)
Margueron, J., Sagawa, H., Hagino, K.
We perform Hartree-Fock-Bogoliubov (HFB) calculations for semi-magic Calcium, Nickel, Tin and Lead isotopes and $N$=20, 28, 50 and 82 isotones using density-dependent pairing interactions recently...
Effective pairing interactions with isospin density dependence (2008)
Margueron, J., Sagawa, H., Hagino, K.
We perform Hartree-Fock-Bogoliubov (HFB) calculations for semi-magic Calcium, Nickel, Tin and Lead isotopes and $N$=20, 28, 50 and 82 isotones using density-dependent pairing interactions recently...
Effective pairing interactions with isospin density dependence (2007)
Margueron, J., Sagawa, H., Hagino, K.
We perform Hartree-Fock-Bogoliubov (HFB) calculations for semi-magic Calcium, Nickel, Tin and Lead isotopes and $N$=20, 28, 50 and 82 isotones using density-dependent pairing interactions recently...
Effective pairing interactions with isospin density dependence (2007)
Margueron, J., Sagawa, H., Hagino, K.
We perform Hartree-Fock-Bogoliubov (HFB) calculations for semi-magic Calcium, Nickel, Tin and Lead isotopes using density-dependent pairing interactions recently derived from a microscopic...
Effective pairing interactions with isospin density dependence (2007)
Margueron, J., Sagawa, H., Hagino, K.
We perform Hartree-Fock-Bogoliubov (HFB) calculations for semi-magic Calcium, Nickel, Tin and Lead isotopes using density-dependent pairing interactions recently derived from a microscopic...
Coupled-channels analyses for large-angle quasi-elastic scattering in massive systems (2007)
F., Muhammad Zamrun, Hagino, K., Mitsuoka, S., Ikezoe, H.
We discuss in detail the coupled-channels approach for the large-angle quasi-elastic scattering in massive systems, where many degrees of freedom may be involved in the reaction. We especially...
Effects of anharmonic vibration on large-angle quasi-elastic scattering of 16O+144Sm (2007)
F., Muhammad Zamrun, Hagino, K.
We study the effects of double octupole and quadrupole phonon excitations in the 144Sm nucleus on quasi-elastic 16O+144Sm scattering at backward angles. To this end, we use the coupled-channels...
Pairing Correlations in halo Nuclei (2007)
Paring correlations in weakly bound halo nuclei $^{6}$He and $^{11}$Li are studied by using a three-body model with a density-dependent contact interaction. We investigate the spatial structure of...
Dipole excitation and geometry of borromean nuclei (2007)
We analyze the Coulomb breakup cross sections of $^{11}$Li and $^6$He nuclei using a three-body model with a density-dependent contact interaction. We show that the concentration of the B(E1)...
Coexistence of BCS- and BEC-like pair structures in halo nuclei (2007)
Hagino, K., Sagawa, H., Carbonell, J., Schuck, P.
We investigate the spatial structure of two-neutron wave function in a Borromean nucleus $^{11}$Li using a three-body model in which two valence neutrons interact with each other by a...
Charge radius and dipole response of $^{11}$Li (2007)
Esbensen, H., Hagino, K., Mueller, P., Sagawa, H.
We investigate the consistency of the measured charge radius and dipole response of $^{11}$Li within a three-body model. We show how these observables are related to the mean square distance between...
Potential inversion with subbarrier fusion data revisited (2007)
We invert experimental data for heavy-ion fusion reactions at energies well below the Coulomb barrier in order to directly determine the internucleus potential between the colliding nuclei. In...
Three-body model calculations for 16C nucleus (2006)
We apply a three-body model consisting of two valence neutrons and the core nucleus $^{14}$C in order to investigate the ground state properties and the electronic quadrupole transition of the...
Coexistence of BCS and BEC-like pair structures in halo nuclei (2006)
Hagino, K., Sagawa, H., Carbonell, J., Schuck, P.
We investigate the spatial structure of the two-neutron wave function in the Borromean nucleus $^{11}$Li, using a three-body model of $^9$Li $+n+n$, which includes many-body correlations stemming...
Recent developments in quasi-elastic scattering around the Coulomb barrier (2006)
We discuss two recent topics on heavy-ion quasi-elastic scattering at energies around the Coulomb barrier. The first topic is an application of quasi-elastic scattering at deep-subbarrier energies to...
Effect of electronic environment on neutrino-nucleus reactions at r-process sites (2006)
Minato, F., Hagino, K., Takigawa, N., Balantekin, A. B., Chomaz, P.
We discuss effects of the electron plasma on charged-current neutrino-nucleus reaction, $(\nu_e,e^-)$ in a core-collapse supernova environment. We first discuss the electron screening effect on the...
Effect of electronic environment on neutrino-nucleus reactions at r-process sites (2006)
Minato, F., Hagino, K., Takigawa, N., Balantekin, A. B., Chomaz, Ph.
We discuss effects of the electron plasma on charged-current neutrino-nucleus reaction, $(\nu_e,e^-)$ in a core-collapse supernova environment. We first discuss the electron screening effect on the...
Sub-barrier Fusion Cross Sections with Energy Density Formalism (2006)
Zamrun, F. Muhammad, Hagino, K., Takigawa, N.
We discuss the applicability of the energy density formalism (EDF) for heavy-ion fusion reactions at sub-barrier energies. For this purpose, we calculate the fusion excitation function and the fusion...
Probing internucleus potential with large-angle quasi-elastic scattering (2006)
Recent measurements for fusion cross section at energies around the Coulomb barrier have systematically indicated a significant deviation of fusion cross sections from a prediction of double-folding...
Deformation parameter for diffuse density (2006)
Hagino, K., Lwin, N. W., Yamagami, M.
In extracting deformation parameters from multipole moments for deformed nuclei, one commonly uses the formulas which are based on a sharp-cut density distribution. We discuss a possible ambiguity...
Structure of positive energy states in a deformed mean-field potential (2006)
We investigate the properties of single-particle resonances in a non-spherical potential by solving the coupled-channels equations for the radial wave functions. We first generalize the box...
Structure of positive energy states in a deformed mean-field potential (2006)
We investigate the properties of single-particle resonances in a non-spherical potential by solving the coupled-channels equations for the radial wave functions. We first generalize the box...
Structure of positive energy states in a deformed mean-field potential (2006)
We investigate the properties of single-particle resonances in a non-spherical potential by solving the coupled-channels equations for the radial wave functions. We first generalize the box...
Hagino, K., Takehi, T., Takigawa, N.
We propose the no-recoil approximation, which is valid for heavy systems, for a double folding nucleus-nucleus potential. With this approximation, the non-local knock-on exchange contribution becomes...
An extra push from entrance-channel effects (2006)
Rowley, N., Grar, N., Hagino, K.
Symmetric heavy-ion collisions are known to display an ‘extra-push' effect. That is, the energy at which the s-wave transmission is 0.5 lies significantly higher than the nominal Coulomb barrier....
Quasi-Elastic Barrier Distribution as a Tool for Investigating Unstable Nuclei (2006)
Quasi-Elastic Barrier Distribution as a Tool for Investigating Unstable Nuclei
An extra push from entrance-channel effects (2006)
Rowley, N., Grar, N., Hagino, K.
Symmetric heavy-ion collisions are known to display an ‘extra-push' effect. That is, the energy at which the s-wave transmission is 0.5 lies significantly higher than the nominal Coulomb barrier....
An extra push from entrance-channel effects (2006)
Rowley, N., Grar, N., Hagino, K.
Symmetric heavy-ion collisions are known to display an ‘extra-push' effect. That is, the energy at which the s-wave transmission is 0.5 lies significantly higher than the nominal Coulomb barrier....
Effect of electronic environment on neutrino-nucleus reactions at r-process sites (2006)
Minato, F., Hagino, K., Takigawa, N., Balantekin, A. B., Chomaz, P.
We discuss effects of the electron plasma on charged-current neutrino-nucleus reaction, $(\nu_e,e^-)$ in a core-collapse supernova environment. We first discuss the electron screening effect on the...
Washiyama, K., Hagino, K., Dasgupta, M.
We perform a systematic study on the surface property of nucleus-nucleus potential in heavy-ion reactions using large-angle quasielastic scattering at energies well below the Coulomb barrier. At...
Quasi-elastic barrier distribution as a tool for investigating unstable nuclei (2005)
The method of fusion barrier distribution has been widely used to interpret the effect of nuclear structure on heavy-ion fusion reactions around the Coulomb barrier. We discuss a similar, but less...
An extra push from entrance-channel effects (2005)
Rowley, N., Grar, N., Hagino, K.
Symmetric heavy-ion collisions are known to display an `extra-push' effect. That is, the energy at which the s-wave transmission is 0.5 lies significantly higher than the nominal Coulomb barrier....
Quasi-elastic barrier distribution as a tool for investigating unstable nuclei (2005)
The method of fusion barrier distribution has been widely used to interpret the effect of nuclear structure on heavy-ion fusion reactions around the Coulomb barrier. We discuss a similar, but less...
Pairing correlations in nuclei on the neutron-drip line (2005)
Paring correlations in weakly bound nuclei on the edge of neutron drip line is studied by using a three-body model. A density-dependent contact interaction is employed to calculate the ground state...
Hagino, K., Rowley, N., Kruppa, A.T.
A FORTRAN77 program is presented that calculates fusion cross sections and mean angular momenta of the compound nucleus under the influence of couplings between the relative motion and several...
Surface diffuseness anomaly in heavy-ion potentials for large-angle quasielastic scattering (2004)
Hagino, K., Takehi, T., Balantekin, A. B., Takigawa, N.
Recent high precision experimental data for heavy-ion fusion reactions at subbarrier energies systematically show that a surprisingly large surface diffuseness parameter for a Woods-Saxon potential...
Quasi-elastic barrier distribution as a tool for investigating unstable nuclei (2004)
The method of fusion barrier distribution has been widely used to interpret the effect of nuclear structure on heavy-ion fusion reactions around the Coulomb barrier. We discuss a similar, but less...
Perturbative HFB model for many-body pairing correlations (2004)
We develop a perturbative model to treat the off-diagonal components in the Hartree-Fock-Bogoliubov (HFB) transformation matrix, which are neglected in the BCS approximation. Applying the...
How does breakup influence near-barrier fusion of weakly bound light nuclei ? (2004)
Beck, C., Rowley, N., Rousseau, M., Haas, F., Bednarczyk, P., Courtin, S., ...
The influence on the fusion process of coupling to collective degrees of freedom has been explored. The significant enhancement of he fusion cross setion at sub-barrier energies was understood in...
WKB approximation for multi-channel barrier penetrability (2004)
Using a method of local transmission matrix, we generalize the well-known WKB formula for a barrier penetrability to multi-channel systems. We compare the WKB penetrability with a solution of the...
Large-angle scattering and quasi-elastic barrier distributions (2004)
We study in detail the barrier distributions extracted from large-angle quasi-elastic scattering of heavy ions at energies near the Coulomb barrier. Using a closed-form expression for scattering from...
Fusion and breakup in the reactions of 6,7Li and 9Be (2004)
Hagino, K., Dasgupta, M., Hinde, D. J.
We develop a three body classical trajectory Monte Carlo (CTMC) method to dicsuss the effect of the breakup process on heavy-ion fusion reactions induced by weakly bound nuclei. This method follows...
Reaction dynamics for fusion of weakly-bound nuclei (2004)
We discuss several open problems of fusion reactions induced by weakly bound nuclei. For this purpose, we solve a one dimensional three-body Hamiltonian with the coupled-channels formalism. We show...
Quasi-elastic barrier distribution as a tool for investigating unstable nuclei (2004)
The method of fusion barrier distribution has been widely used to interpret the effect of nuclear structure on heavy-ion fusion reactions around the Coulomb barrier. We discuss a similar, but less...
How does breakup influence near-barrier fusion of weakly bound light nuclei ? (2004)
Beck, C., Rowley, N., Rousseau, M., Haas, F., Bednarczyk, P., Courtin, S., ...
The influence on the fusion process of coupling to collective degrees of freedom has been explored. The significant enhancement of he fusion cross setion at sub-barrier energies was understood in...
Structure of positive energy states in a deformed mean-field potential (2004)
We investigate the properties of single-particle resonances in a non-spherical potential by solving the coupled-channels equations for the radial wave functions. We first generalize the box...
How many fusion barriers ? (2004)
Swiderski, L., Czosnyka, P., Kowalczyk, M., Piasecki, E., Piasecki, K., Witecki, M., ...
Quasi-elastic barrier distribution as a tool for investigating unstable nuclei (2004)
The method of fusion barrier distribution has been widely used to interpret the effect of nuclear structure on heavy-ion fusion reactions around the Coulomb barrier. We discuss a similar, but less...
How does breakup influence near-barrier fusion of weakly bound light nuclei ? (2004)
Beck, C., Rowley, N., Rousseau, M., Haas, F., Bednarczyk, P., Courtin, S., ...
The influence on the fusion process of coupling to collective degrees of freedom has been explored. The significant enhancement of he fusion cross setion at sub-barrier energies was understood in...
Structure of positive energy states in a deformed mean-field potential (2004)
We investigate the properties of single-particle resonances in a non-spherical potential by solving the coupled-channels equations for the radial wave functions. We first generalize the box...
How many fusion barriers ? (2004)
Swiderski, L., Czosnyka, P., Kowalczyk, M., Piasecki, E., Piasecki, K., Witecki, M., ...
How does breakup influence near-barrier fusion of weakly bound light nuclei ? (2004)
Beck, C., Rowley, N., Rousseau, M., Haas, F., Bednarczyk, P., Courtin, S., ...
The influence on the fusion process of coupling to collective degrees of freedom has been explored. The significant enhancement of he fusion cross setion at sub-barrier energies was understood in...
How does breakup influence near-barrier fusion of weakly bound light nuclei ? (2004)
Beck, C., Rowley, N., Rousseau, M., Haas, F., Bednarczyk, P., Courtin, S., ...
The influence on the fusion process of coupling to collective degrees of freedom has been explored. The significant enhancement of he fusion cross setion at sub-barrier energies was understood in...
How does breakup influence near-barrier fusion of weakly bound light nuclei ? (2004)
Beck, C., Rowley, N., Rousseau, M., Haas, F., Bednarczyk, P., Courtin, S., ...
The influence on the fusion process of coupling to collective degrees of freedom has been explored. The significant enhancement of he fusion cross setion at sub-barrier energies was understood in...
Fusion dynamics around the Coulomb barrier (2003)
Hagino, K., Rowley, N., Ohtsuki, T., Dasgupta, M., Newton, J.O., Hinde, D.J.
Fusion dynamics around the Coulomb barrier (2003)
Hagino, K., Rowley, N., Ohtsuki, T., Dasgupta, M., Newton, J. O., Hinde, D. J.
We perform exact coupled-channels calculations, taking into account properly the effects of Coulomb coupling and the finite excitation energy of collective excitations in the colliding nuclei, for...
Continuum QRPA response for deformed neutron-rich nuclei (2003)
Hagino, K., Van Giai, Nguyen, Sagawa, H.
We discuss properties of the quadrupole collective excitation of the deformed neutron-rich nucleus $^{38}$Mg within the framework of quasi-particle random phase approximation (QRPA). We first solve...
Role of virtual break-up of projectile in astrophysical fusion reactions (2003)
Hagino, K., Hussein, M. S., Balantekin, A. B.
We study the effect of virtual Coulomb break-up, commonly known as the dipole polarizability, of the deuteron projectile on the astrophysical fusion reaction 3He(d,p)4He. We use the adiabatic...
Variational RPA for the Mie resonance in jellium (2003)
Bertsch, G. F., Guet, C., Hagino, K.
The surface plasmon in simple metal clusters is red-shifted from the Mie frequency, the energy shift being significantly larger than the usual spill-out correction. Here we develop a variational...
Structure of positive energy states in a deformed mean-field potential (2003)
We investigate the properties of single-particle resonances in a non-spherical potential by solving the coupled-channels equations for the radial wave functions. We first generalize the box...
Generator Coordinate Truncations (2003)
We investigate the accuracy of several schemes to calculate ground-state correlation energies using the generator coordinate technique. Our test-bed for the study is the $sd$ interacting boson model,...
Fusion cross sections at deep subbarrier energies (2003)
Hagino, K., Rowley, N., Dasgupta, M.
A recent publication reports that heavy-ion fusion cross sections at extreme subbarrier energies show a continuous change of their logarithmic slope with decreasing energy, resulting in a much...
New barrier fusion excitation function of $^6$Li+$^{208}$Pb (2003)
Wu, Y.W., Liu, Z.H., Lin, C.J., Zhang, H.Q., Ruan, M., Yang, F., ...
Fusion dynamics around the Coulomb barrier (2003)
Hagino, K., Rowley, N., Ohtsuki, T., Dasgupta, M., Newton, J.O., Hinde, D.J.
Near-barrier fusion of weakly bound $^{6}$Li and $^{7}$Li nuclei with $^{59}$Co (2003)
Beck, C., Souza, F.A., Rowley, N., Sanders, S.J., Aissaoui, N., Alonso, E.E., ...
New barrier fusion excitation function of $^6$Li+$^{208}$Pb (2003)
Wu, Y.W., Liu, Z.H., Lin, C.J., Zhang, H.Q., Ruan, M., Yang, F., ...
Fusion dynamics around the Coulomb barrier (2003)
Hagino, K., Rowley, N., Ohtsuki, T., Dasgupta, M., Newton, J.O., Hinde, D.J.
Near-barrier fusion of weakly bound $^{6}$Li and $^{7}$Li nuclei with $^{59}$Co (2003)
Beck, C., Souza, F.A., Rowley, N., Sanders, S.J., Aissaoui, N., Alonso, E.E., ...
Radiation correction to astrophysical fusion reactions and the electron screening problem (2002)
We discuss the effect of electromagnetic environment on laboratory measurements of the nuclear fusion reactions of astrophysical interest. The radiation field is eliminated using the path integral...
Low-energy photodisintegration of $^9$Be with the molecular orbit model (2002)
We use a microscopic three-cluster model with the $\alpha+\alpha+n$ configuration to analyze with astrophysical interests the photodisintegration cross section of $^9$Be. The valence neutron in...
Projection and ground state correlations made simple (2002)
We develop and test efficient approximations to estimate ground state correlations associated with low- and zero-energy modes. The scheme is an extension of the generator-coordinate-method (GCM)...
Dynamical particle-phonon couplings in proton emission from spherical nuclei (2002)
We present results of coupled-channels calculations which are performed to understand the role of vibrational excitations of the daughter nucleus in proton emission decay of spherical nuclei. It is...
Fusion Suppression and Sub-Barrier Breakup of Weakly Bound Nuclei (2002)
Hinde, D.J., Dasgupta, M., Fulton, B.R., Morton, C.R., Wooliscroft, R.J., Berriman, A.C., ...
The mechanism for the large suppression of complete fusion in the 9Be+208Pb reaction has been investigated through measurement of sub-barrier breakup of 9Be. Excluding breakup through the 8Be ground...
Surface diffuseness anomaly in heavy-ion fusion potentials (2001)
Hagino, K., Dasgupta, M., Gontchar, I. I., Hinde, D. J., Morton, C. R., Newton, J. O.
Recent high precision experimental data for heavy-ion fusion cross sections at energies in the vicinity of the Coulomb barrier systematically show that a strikingly large surface diffuseness...
Influence of higher-order deformations in the ^{34}S + ^{168}Er fusion reaction (2001)
Morton, C. R., Berriman, A. C., Butt, R. D., Dasgupta, M., Hinde, D. J., Godley, A., ...
The shape of the measured barrier distribution for the ^{34}S + ^{168}Er reaction is analysed using the coupled-channels description. The ^{168}Er nucleus is a good candidate to test current fusion...
It has been observed that decay rate for proton emission from $d_{3/2}$ single particle state is systematically quenched compared with the prediction of a one dimensional potential model although the...
Continuum QRPA in the coordinate space representation (2001)
We formulate a quasi-particle random phase approximation (QRPA) in the coordinate space representation. This model is a natural extension of the RPA model of Shlomo and Bertsch to open-shell nuclei...
Sub-barrier fusion of drip-line nuclei (2000)
We discuss the role of break-up process of a loosely-bound projectile in subbarrier fusion reactions. Coupled-channels calculations are carried out for $^{11}$Be + $^{208}$Pb and $^{4,6}$He +...
Mean field theory for global binding systematics (2000)
We review some possible improvements of mean field theory for application to nuclear binding systematics. Up to now, microscopic theory has been less successful than models starting from the liquid...
Role of deformation in the nonmesonic decay of light hypernuclei (2000)
We discuss the nonmesonic decay of deformed p-shell hypernuclei. The Nilsson model with angular momentum projection is employed in order to take into account the deformation effects. The nonmesonic...
Correlation energy of the pairing Hamiltonian (2000)
We study the correlation energy associated with the pair fluctuations in BCS theory. We use a schematic two-level pairing model and discuss the behavior of the correlation energy across shell...
Taxon lists for studies of modern nannoplankton (2000)
Jordan, R.W., Broerse, A.T.C., Hagino, K., Kinkel, H., Sprengel, C., Takahashi, K., ...
RPA approach to rotational symmetry restoration in a three-level Lipkin model (1999)
We study an extended Lipkin-Meshkov-Glick model that permits a transition to a deformed phase with a broken continuous symmetry. Unlike simpler models, one sees a persistent zero-frequency Goldstone...
Hagino, K., Vitturi, A., Dasso, C. H., Lenzi, S. M.
We carry out realistic coupled-channels calculations for $^{11}$Be + $^{208}$Pb reaction in order to discuss the effects of break-up of the projectile nucleus on sub-barrier fusion. We discretize in...
Coupled-channels analysis of the $^{{\bf 16}}$O+$^{{\bf 208}}$Pb fusion barrier distribution (1999)
Morton, C. R., Berriman, A. C., Dasgupta, M., Hinde, D. J., Newton, J. O., Hagino, K., ...
Analyses using simplified coupled-channels models have been unable to describe the shape of the previously measured fusion barrier distribution for the doubly magic $^{16}$O+$^{208}$Pb system. This...
Hagino, K., Rowley, N., Kruppa, A. T.
A FORTRAN77 program is presented that calculates fusion cross sections and mean angular momenta of the compound nucleus under the influence of couplings between the relative motion and several...
How harmonic is dipole resonance of metal clusters? (1999)
We discuss the degree of anharmonicity of dipole plasmon resonances in metal clusters. We employ the time-dependent variational principle and show that the relative shift of the second phonon scales...
Fusion versus Breakup: Observation of Large Fusion Suppression for ^9Be + ^{208}Pb (1999)
Dasgupta, M., Hinde, D. J., Butt, R. D., Anjos, R. M., Berriman, A. C., Carlin, N., ...
Complete fusion excitation functions for $^{9}$Be + $^{208}$Pb have been measured to high precision at near barrier energies. The experimental fusion barrier distribution extracted from these data...
Hagino, K., Rowley, N., Kruppa, A.T.
A FORTRAN77 program is presented that calculates fusion cross sections and mean angular momenta of the compound nucleus under the influence of couplings between the relative motion and several...
Hagino, K., Rowley, N., Kruppa, A.T.
A FORTRAN77 program is presented that calculates fusion cross sections and mean angular momenta of the compound nucleus under the influence of couplings between the relative motion and several...
Anharmonic collective excitation in a solvable model (1998)
Bertsch, G. F., Bortignon, P. F., Hagino, K.
We apply the time-dependent variational principle, the nuclear field theory, and the boson expansion method to the Lipkin model to discuss anharmonicities of collective vibrational excitations. It is...
Bremsstrahlung in $\alpha$ Decay (1998)
Takigawa, N., Nozawa, Y., Hagino, K., Ono, A., Brink, D. M.
A quantum mechanical analysis of the bremsstrahlung in $\alpha$ decay of $^{210}$Po is performed in close reference to a semiclassical theory. We clarify the contribution from the tunneling, mixed,...
Effects of finite width of excited states on heavy-ion sub-barrier fusion reactions (1998)
We discuss the effects of coupling of the relative motion to nuclear collective excitations which have a finite lifetime on heavy-ion fusion reactions at energies near and below the Coulomb barrier....
Excitation of nuclear anharmonic vibrations in heavy-ion fusion reactions (1997)
Hagino, K., Kuyucak, S., Takigawa, N.
We discuss the effects of multi-phonon excitations on heavy-ion fusion reactions at energies near and below the Coulomb barrier, focusing especially on the role of anharmonicities. We carry out a...
Anharmonic phonon excitations in subbarrier fusion reactions (1997)
Hagino, K., Takigawa, N., Kuyucak, S.
Recently measured high precision data of fusion excitation function have enabled a detailed study on the effects of nuclear collective excitations on fusion reactions. Using such highly accurate data...
Barrier Distributions as a Tool to Investigate Fusion and Fission (1997)
Dasgupta, M., Hinde, D. J., Leigh, J. R., Hagino, K.
The recent availability of precisely measured fusion cross-sections has enabled the extraction of a representation of the distribution of barriers encountered during fusion. These representations,...
Evidence of Double Phonon Excitations in ^{16}O + ^{208}Pb Reaction (1997)
Dasgupta, M., Hagino, K., Morton, C. R., Hinde, D. J., Leigh, J. R., Takigawa, N., ...
The fusion cross-sections for ^{16}O + ^{208}Pb, measured to high precision, enable the extraction of the distribution of fusion barriers. This shows a structure markedly different from the...
Probing anharmonic properties of nuclear surface vibration by heavy-ion fusion reactions (1997)
Takigawa, N., Hagino, K., Kuyucak, S.
Describing fusion reactions between ^{16}O and ^{154}Dy and, between ^{16}O and ^{144}Sm by the $sd-$ and $sdf-$ interacting boson model, we show that heavy-ion fusion reactions are strongly affected...
Importance of Non-Linear Couplings in Fusion Barrier Distributions and Mean Angular Momenta (1997)
Hagino, K., Takigawa, N., Dasgupta, M., Hinde, D. J., Leigh, J. R.
The effects of higher order coupling of surface vibrations to the relative motion on heavy-ion fusion reactions at near-barrier energies are investigated. The coupled channels equations are solved to...
Fusion barrier distributions in systems with finite excitation energy (1997)
Hagino, K., Takigawa, N., Balantekin, A. B.
Eigen-channel approach to heavy-ion fusion reactions is exact only when the excitation energy of the intrinsic motion is zero. In order to take into account effects of finite excitation energy, we...
Role of anharmonicities of nuclear vibrations in fusion reactions at subbarrier energies (1997)
Hagino, K., Takigawa, N., Kuyucak, S.
We discuss the effects of double octupole and quadrupole phonon excitations in $^{144}$Sm on fusion reactions between $^{16}$O and $^{144}$Sm at subbarrier energies. The effects of anharmonicities of...
Adiabatic quantum tunneling in heavy-ion sub-barrier fusion (1997)
Hagino, K., Takigawa, N., Dasgupta, M., Hinde, D. J., Leigh, J. R.
High precision measurements of the fusion excitation functions for the reactions ^{40}Ca + ^{194}Pt, ^{192}Os clearly demonstrate that projectile excitation significantly modifies the potential...
Hagino, K., Takigawa, N., Dasgupta, M., Hinde, D. J., Leigh, J. R.
The role of higher order coupling of surface vibrations to the relative motion in heavy-ion fusion reactions at near-barrier energies is investigated. The coupled channels equations are solved to all...
Non-adiabatic effect in electron screening in fusion reactions at astrophysical energies (1995)
Hagino, K., Takigawa, N., Abe, M.
We calculate the electron screening effect in low energy nuclear fusion reactions by taking non-adiabaticity of the tunnleing process into account. In order to investigate deviations from the...
Thermal fission rate around super-normal phase transition (1995)
Hagino, K., Takigawa, N., Abe, M.
Using Langer's $Im F$ method, we discuss the temperature dependence of nuclear fission width in the presence of dissipative environments. We introduce a low cut-off frequency to the spectral density...
Path integral approach to no-Coriolis approximation in heavy-ion collisions (1995)
Hagino, K., Takigawa, N., Balantekin, A. B., Bennett, J. R.
We use the two time influence functional method of the path integral approach in order to reduce the dimension of the coupled-channels equations for heavy-ion reactions based on the no-Coriolis...
Effects of mass renormalization on the surface properties of heavy-ion fusion potential (1995)
We discuss the effects of fast nuclear excitations on heavy-ion fusion reactions at energies near and below the Coulomb barrier. Using the fusion of two $^{40}$Ca nuclei as an example and the...