Production of Neutron-Rich Lambda Hypernuclei at J-PARC (2009)
Sakaguchi, A., Ajimura, S., Bhang, H., Busso, L., Endo, M., Faso, D., ...
We discuss the usefulness of the double charge-exchange reactions (DCX) for the production of the neutron-rich Lambda-hypernuclei. We believe the (pi-,K+) reaction is one of the most promising DCX...
Bianchin, S., Achenbach, P., Ajimura, S., Borodina, O., Fukuda, T., Hoffmann, J., ...
The HypHI collaboration aims to perform a precise hypernuclear spectroscopy with stable heavy ion beams and rare isotope beams at GSI and fAIR in order to study hypernuclei at extreme isospin,...
Photoproduction of Lambda(1405) and Sigma^{0}(1385) on the proton at E_\gamma = 1.5-2.4 GeV (2008)
Niiyama, M., Fujimura, H., Ahn, D. S., Ahn, J. K., Ajimura, S., Bhang, H. C., ...
Differential cross sections for $\gamma p \to K^+\Lambda(1405)$ and $\gamma p \to K^+\Sigma^0(1385)$ reactions have been measured in the photon energy range from 1.5 to 2.4 GeV and the angular range...
In-beam tests of scintillating fibre detectors at MAMI and at GSI (2008)
Achenbach, P., Gayoso, C. Ayerbe, Bernauer, J. C., Böhm, R., Distler, M. O., Doria, L., ...
The performance of scintillating fibre detectors was studied with electrons at the spectrometer facility of the Mainz microtron MAMI, as well as in a C-12 beam of 2 AGeV energy and in a beam of...
H. Bhang, H. Park, J. H. Kim, Y. D. Kim, M. Youn, O. Hashimoto, ...
Through the last 7-8 years of collaboration with the SKS hypernuclear physics group at KEK, we have concentrated on the measurement of hypernuclear decays. Non-mesonic weak decay mode of hypernucleus...
Coincidence Measurement of the Nonmesonic Weak Decay of ^{12}_{Lambda}C (2006)
Kim, M. J., Ajimura, S., Aoki, K., Banu, A., Bhang, H., Fukuda, T., ...
We have measured the angular correlation of the pair nucleons np and nn emitted from the nonmesonic weak decay (NMWD) of ^{12}_{Lambda}C produced via the (pi^+,K^+) reaction in coincidence...
Exclusive proton asymmetry measurement in non-mesonic weak decay of polarized 5_Lambda_He (2005)
Maruta, T., Ajimura, S., Aoki, K., Banu, A., Bhang, H., Fukuda, T., ...
The asymmetry parameter alpha_p^NM for a proton exclusively emitted in the Lambda p -> np process was, for the first time, measured in the non-mesonic weak decay of a polarized 5_La,bda_He...
Exclusive Measurement of the Nonmesonic Weak Decay of ^{5}_{\Lambda}He Hypernucleus (2005)
Kang, B. H., Ajimura, S., Aoki, K., Banu, A., Bhang, H., Fukuda, T., ...
We performed a coincidence measurement of two nucleons emitted from the nonmesonic weak decay (NMWD) of ^{5}_{\Lambda}He formed via the ^{6}Li(\pi^+,K^+) reaction. The energies of two nucleons and...
Okada, S., Ajimura, S., Aoki, K., Banu, A., Bhang, H. C., Fukuda, T., ...
We have measured both yields of neutron-proton and neutron-neutron pairs emitted from the non-mesonic weak decay process of 5_Lambda-He and 12_Lambda-C hypernuclei produced via the (pi^+,K^+)...
Mesonic and nonmesonic weak decay widths of medium-heavy lambda hypernuclei (2004)
Sato, Y., Ajimura, S., Aoki, K., Bhang, H., Hasegawa, T., Hashimoto, O., ...
We have measured the energy spectra of pions and protons emitted in the weak decay of 12_Lambda_C, 28_Lambda_Si, and Lambda_Fe hypernuclei produced via the (pi+, K+) reaction. The decay widths of the...
Okada, S., Ajimura, S., Aoki, K., Banu, A., Bhang, H. C., Fukuda, T., ...
We have simultaneously measured the energy spectra of neutrons and protons emitted in the non-mesonic weak decays of 5_Lambda-He and 12_Lambda-C hypernuclei produced via the (pi^+,k^+) reaction with...
Saha, P. K., Noumi, H., Abe, D., Ajimura, S., Aoki, K., Bhang, H. C., ...
In order to study the Sigma-nucleus optical potential, we measured inclusive (pi^-,K^+) spectra on medium-to-heavy nuclear targets: CH_2, Si, Ni, In and Bi. The CH_2 target was used to calibrate the...
Measurement of the $\pi^-$ decay width of $^5_\Lambda$He (2004)
Kameoka, S., Ajimura, S., Aoki, K., Banu, A., Bhang, H. C., Fukuda, T., ...
We have precisely measured $\Lambda \to p\pi^-$ decay width of \5LHe and demonstrated significantly larger $\alpha$ -$\Lambda$ overlap than expected from the central repulsion $\alpha$-$\Lambda$...
pi^0 decay branching ratios of 5_Lambda-He and 12_Lambda-C hypernuclei (2004)
Okada, S., Ajimura, S., Aoki, K., Banu, A., Bhang, H. C., Fukuda, T., ...
We precisely measured pi^0 branching ratios of 5_Lambda-He and 12_Lambda-C hypernuclei produced via (pi^+,k^+) reaction. Using these pi^0 branching ratios with the pi^- branching ratios and the...
Proton asymmetry in non-mesonic weak decay of light hypernuclei (2004)
Maruta, T., Ajimura, S., Aoki, K., Banu, A., Bhang, H., Fukuda, T., ...
We have obtained the decay asymmetry parameters in non-mesonic weak decay of polarized Lambda-hypernuclei by measuring the proton asymmetry. The polarized Lambda-hypernuclei, 5_Lambda-He,...
Scintillation efficiency of nuclear recoils in a CaF-2(Eu) crystal for dark matter search (2001)
Hazama, R., Ajimura, S., Hayakawa, H., Matsuoka, K., Miyawaki, H., Morikubo, K., ...
The scintillation efficiency (quenching factor) of fluorine and calcium nuclei recoiling in a CaF-2(Eu) crystal was measured in an energy region relevant to dark matter searches. The recoiling nuclei...
Production of 4Lambda LambdaH Hypernuclei (2001)
Ahn, J. K., Ajimura, S., Akikawa, H., Bassalleck, B., Berdoz, A.
Observation of Spin-Orbit Splitting in Lambda Single-Particle States (2001)
Ajimura, S., Hayakawa, H., Kishimoto, T., Kohri, H., Matsuoka, K.
Measurements of the photon detection inefficiency of calorimeters between 185 and 505 GeV (1998)
Ajimura, S, Endo, T, Inagaki, T, Itoh, S, Kuno, Y, Maeda, K I, ...
Polarization of $^{5}_{\Lambda}He$ produced by the $(\pi^{+}, K^{+})$ reaction (1998)
Ajimura, S, Ishikawa, M, Ikeda, K, Kishimoto, T, Okusu, A, Shinkai, N, ...
Hypernuclear weak decay of $_{\Lambda}^{12}$C and $_{\Lambda}^{11}$B (1995)
Noumi, H, Ajimura, S, Ejiri, H, Higashi, A, Kishimoto, T, Gill, D R, ...
The superconducting kaon spectrometer: SKS (1994)
Fukuda, T, Hasegawa, T, Hashimoto, O, Higashi, A, Homma, S, Kitami, T, ...
The $\Lambda$ hypernuclear spectroscopy with the SKS spectrometer at KEK 12 GeV PS (1994)
Ajimura, S, Aoki, K, Bhang, H C, Gavrilov, Yu K, Hasegawa, T, Hashimoto, O, ...
Hasegawa, T, Hashimoto, O, Homma, S, Miyachi, T, Nagae, T, Sekimoto, M, ...
Mass Dependence of Lifetimes of hypernuclei
H. Bhang, H. Park, Y. D. Kim, M. Youn, O. Hashimoto, K. Maeda, ...
We have determined the lifetimes of hypernuclei over a broad mass range, A=1156, from which its characteristic mass dependence is clearly observed. The lifetime decreases slightly from that of free...