beta-decay spectroscopy of the proton drip-line nucleus Al-22

C. G. Wu,H. Y. Wu,J. G. Li, D. W. Luo,Z. H. Li,H. Hua, X. X. Xu,C. J. Lin,J. Lee,L. J. Sun, P. F. Liang, C. X. Yuan,Y. Y. Yang,J. S. Wang,D. X. Wang, F. F. Duan,Y. H. Lam, P. Ma,Z. H. Gao, Q. Hu, Z. Bai,J. B. Ma,J. G. Wang, F. P. Zhong, Y. Jiang,Y. Liu,D. S. Hou,R. Li,N. R. Ma, W. H. Ma, G. Z. Shi,G. M. Yu,D. Patel, S. Y. Jin,Y. F. Wang,Y. C. Yu, Q. W. Zhou, P. Wang, L. Y. Hu,S. Q. Fan,X. Wang, H. L. Zang,P. J. Li, Q. Q. Zhao,L. Yang, P. W. Wen,F. Yang,H. M. Jia,G. L. Zhang,M. Pan,X. Y. Wang,H. H. Sun,Z. G. Hu,M. L. Liu,R. F. Chen, W. Q. Yang,S. Q. Hou,J. J. He,Y. M. Zhao, F. R. Xu,H. Q. Zhang

Physical Review C（2021）

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摘要

A detailed beta-decay spectroscopic study of Al-22 was performed at the Radioactive Ion Beam Line in Lanzhou. With the beta-gamma-particle coincidence measurement by a high-resolution DSSD particle detection array and a high efficiency gamma-ray detection array, total eight excited states in Mg-22 fed by Gamow-Teller transitions was newly identified. The one-proton, two-proton, and a decays of the IAS at 14046(5) keV in Mg-22, which were partly observed in different experiments before, were identified simultaneously in the present work, providing accurate spectroscopic information about its decay. A more complete beta-decay scheme of Al-22 was constructed and compared to the shell-model calculations with the USD-type Hamiltonians, USDC and USDB.

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