FU Yuan-Yong1, ZHOU Shu-Hua1, T. Koike2, S. Kinoshita2, Y. Ma2, Y. Miura2, K. Miwa2, Y. Miyagi2, K. Shirotori2, T. Suzuki2, H. Tamura2, K. Tsukada2, M. Ukai2, K. Futatsukawa2, K. Hosomi2, M. Kawai2, M. Mimori2, N. Terada2, N. Maruyama2, K. Aoki3, H. Fujioka3, Y. Kakiguchi3, T. Nagae3, D. Nakajima3, H. Noumi3, T. Takahashi3, T.N. Takahashi3, A. Toyota3, M. Dairaku4, T. Fukuda5, S. Minami5, W. Imoto5, S. Ajimura6, K. Tanida7
1China Institute of Atomic Energy, PO Box 275(18), Beijing 1024132Department of Physics, Tohoku University, Sendai, 980-8578, Japan3High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, 305-0801, Japan4Department of Physics, Kyoto University, Kyoto, 606-8502, Japan5Osaka Electro-Communication University, Osaka, 572-8530, Japan6Department of Physics, Osaka University, Osaka, 560-0043, Japan7RIKEN, Wako 351-0198, Japan
摘要From the 12C(π+, K+)12ΛC reaction, the γ-rays of 261.6±0.24keV (7/2+→to 5/2+) and 1481.7±0.7keV (1/2+±5/2+) of 11ΛB, and 2667.3±2.8keV (12-→to 21-) of 12ΛC hypernuclei have been identified using a large germanium detector array Hyperball2 at K6 beam line of KEK. The observed energies of the transitions 1481.7keV and 261.6keV are significantly different from the values predicted by the shell model using the △ and SN parameters determined from the 7ΛLi data.
Abstract：From the 12C(π+, K+)12ΛC reaction, the γ-rays of 261.6±0.24keV (7/2+→to 5/2+) and 1481.7±0.7keV (1/2+±5/2+) of 11ΛB, and 2667.3±2.8keV (12-→to 21-) of 12ΛC hypernuclei have been identified using a large germanium detector array Hyperball2 at K6 beam line of KEK. The observed energies of the transitions 1481.7keV and 261.6keV are significantly different from the values predicted by the shell model using the △ and SN parameters determined from the 7ΛLi data.
FU Yuan-Yong;ZHOU Shu-Hua;T. Koike;S. Kinoshita;Y. Ma;Y. Miura;K. Miwa;Y. Miyagi;K. Shirotori;T. Suzuki;H. Tamura;K. Tsukada;M. Ukai;K. Futatsukawa;K. Hosomi;M. Kawai;M. Mimori;N. Terada;N. Maruyama;K. Aoki;H. Fujioka;Y. Kakiguchi; T. Nagae;D. Nakajima;H. Noumi;T. Takahashi;T.N. Takahashi;A. Toyota;M. Dairaku;T. Fukuda;S. Minami;W. Imoto;S. Ajimura;K. Tanida. Measurement of Gamma-Rays from 11ΛB and 12ΛC[J]. 中国物理快报, 2007, 24(8): 2216-2218.
FU Yuan-Yong, ZHOU Shu-Hua, T. Koike, S. Kinoshita, Y. Ma, Y. Miura, K. Miwa, Y. Miyagi, K. Shirotori, T. Suzuki, H. Tamura, K. Tsukada, M. Ukai, K. Futatsukawa, K. Hosomi, M. Kawai, M. Mimori, N. Terada, N. Maruyama, K. Aoki, H. Fujioka, Y. Kakiguchi, T. Nagae, D. Nakajima, H. Noumi, T. Takahashi, T.N. Takahashi, A. Toyota, M. Dairaku, T. Fukuda, S. Minami, W. Imoto, S. Ajimura, K. Tanida. Measurement of Gamma-Rays from 11ΛB and 12ΛC. Chin. Phys. Lett., 2007, 24(8): 2216-2218.
[1] Millener D J et al 1985 Phys. Rev. C 31499 [2] Tamura H et al 2000 Phys. Rev. Lett. 845963 [3] Akikawa H et al 2002 Phys. Rev. Lett. 88082501 [4] Ukai M et al 2004 Phys. Rev. Lett. 93232501 [5] Tanaka K H et al 1986 Nucl. Phys. A 450 533c [6] Fukuda T et al 1995 Nucl. Instrum. Methods A 361485 [7] Miura Y et al 2005 Nucl. Phys. A 754 75c [8] Miura Y et al 2004 Acta Phys. Polon. 1019 B35 [9] Dalitz R H,Davis D H and Tovee D N 1986 Nucl. Phys. A 450 311c [10] Hotchi H PhD Thesis (Graduate School of University ofTokyo) [11] Millener D J private communication
2007, Vol. 24 
