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...
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...
Inclusive pion double charge exchange on O-16 above the delta resonance (2005)
Krutenkova, A. P., Watanabe, T., Abe, D., Fujii, Y., Hashimoto, O., Kulikov, V. V., ...
The forward inclusive pion double charge exchange reaction, ^{16}O(pi^-,pi^+)X, at T_0 = 0.50 and 0.75 GeV has been studied in the kinematical region where an additional pion production is forbidden...
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,...
Observation of a He-6(Lambda Lambda) double hypernucleus (2001)
Takahashi, H, Ahn, JK, Akikawa, H, Aoki, S, Arai, K, Bahk, SY, ...
Suzuki, Y., Ieiri, M., Katoh, Y., Kusano, E., Minakawa, M., Noumi, H., ...
A GPIB address converter (GAC) has been constructed. This paper reports on the function and test results. The GAC has two GPIB connectors (upper and lower ports). The upper port has a GPIB primary...
Large horn magnets at the KEK neutrino beam line (1998)
Yamanoi, Y, Ieiri, M, Suzuki, Y, Minakawa, M, Noumi, H, Kato, Y, ...
Polarization of $^{5}_{\Lambda}He$ produced by the $(\pi^{+}, K^{+})$ reaction (1998)
Ajimura, S, Ishikawa, M, Ikeda, K, Kishimoto, T, Okusu, A, Shinkai, N, ...
Neutron beam line at the KEK 12-GeV PS (1996)
Noumi, H, Sawada, S, Hasegawa, T, Horikawa, N, Ieiri, M, Ishii, M, ...
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, ...
Optical design of beam lines at the KEK-PS new experimental hall (1995)
Tanaka, K H, Ieiri, M, Noumi, H, Minakawa, M, Yamanoi, Y, Kato, Y, ...
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...