New investigation of low-lying states in 12Be via a 2H(13B, 3He) reaction

被引:6
|
作者
Liu, W. [1 ,2 ]
Lou, J. L. [1 ,2 ]
Ye, Y. L. [1 ,2 ]
Wang, S. M. [3 ,4 ,5 ]
Tan, Z. W. [1 ,2 ]
Li, Z. H. [1 ,2 ]
Li, Q. T. [1 ,2 ]
Hua, H. [1 ,2 ]
Yang, X. F. [1 ,2 ]
Xu, J. Y. [1 ,2 ]
Ong, H. J. [6 ,7 ,8 ,9 ]
Tran, D. T. [6 ,10 ]
Aoi, N. [6 ]
Ideguchi, E. [6 ]
Pang, D. Y. [11 ]
Yuan, C. X. [12 ]
Jiang, Y. [1 ,2 ]
Yang, B. [1 ,2 ]
Liu, Y. [1 ,2 ]
Li, J. G. [1 ,2 ]
Chen, Z. Q. [1 ,2 ]
Han, J. X. [1 ,2 ]
Bai, S. W. [1 ,2 ]
Li, G. [1 ,2 ]
Ma, K. [1 ,2 ]
Zhu, H. Y. [1 ,2 ]
Xia, B. L. [1 ,2 ]
机构
[1] Peking Univ, Sch Phys, Beijing 100871, Peoples R China
[2] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
[3] Fudan Univ, Key Lab Nucl Phys & Ion Beam Applicat MOE, Inst Modern Phys, Shanghai 200433, Peoples R China
[4] NSFC, Shanghai Res Ctr Theoret Nucl Phys, Shanghai 200438, Peoples R China
[5] Fudan Univ, Shanghai 200438, Peoples R China
[6] Osaka Univ, Res Ctr Nucl Phys, Ibaraki, Osaka 5670047, Japan
[7] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
[8] Lanzhou Univ, Joint Dept Nucl Phys, Lanzhou 730000, Peoples R China
[9] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China
[10] Vietnam Acad Sci & Technol, Inst Phys, Hanoi 10000, Vietnam
[11] Beihang Univ, Sch Phys, Beijing Key Lab Adv Nucl Mat & Phys, Beijing 100191, Peoples R China
[12] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
MAGIC NUMBER; MODEL;
D O I
10.1103/PhysRevC.105.034613
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
We investigate the low-lying positive-parity states in Be-12, which are populated by the( 2)H(B-13, He-3) reaction via l = 1 proton transfer for the first time using a radioactive beam B-13 at 23 MeV/nucleon. Spectroscopic factors and excitation energies of these states are in reasonable agreement with the shell model predictions. Besides two bound states, we observe a resonant state at E-x = 4.8 +/- 0.1 MeV with an intrinsic width of 0.42 +/- 0.28 MeV, which predominately decays via one neutron to the bound states in 11Be. It most likely corresponds to the E-n = 1.24 MeV state observed in the previous one-proton removal reaction. The spin-parity of 2(+) is tentatively assigned to this resonance according to the analysis of its angular distributions as well as the theoretical calculations, including shell model and Gamow coupled-channel approach.
引用
收藏
页数:8
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