摘要
Two recently observed ^293Lv （Z = 116） α-decay chains [Eur. Phys. J. A 48, 62 （2012）] are investigated in the framework of covariant density functional theory with PC-PK1, where the pairing correlations are treated by the Bardeen-Cooper-Schrieffer method with a density-independent zerorange force. From the calculated potential energy curves, it is found that two minima always occur, with one having an almost spherical shape and the other exhibiting a large deformed prolate shape. Originating from the ground state and the shape-isomeric state of ^293Lv, the two observed a-decay chains are constructed and the calculated Qα values are found to be in good agreement with the data.
Two recently observed ^293Lv （Z = 116） α-decay chains [Eur. Phys. J. A 48, 62 （2012）] are investigated in the framework of covariant density functional theory with PC-PK1, where the pairing correlations are treated by the Bardeen-Cooper-Schrieffer method with a density-independent zerorange force. From the calculated potential energy curves, it is found that two minima always occur, with one having an almost spherical shape and the other exhibiting a large deformed prolate shape. Originating from the ground state and the shape-isomeric state of ^293Lv, the two observed a-decay chains are constructed and the calculated Qα values are found to be in good agreement with the data.
基金
Acknowledgements The authors are indebted to S. Heinz, J. Meng, and S. Q. Zhang for their valuable suggestions and critical reviews. This work was supported by the Major State 973 Program of China （Grant No. 2013CB834400）, the National Natural Science Foundation of China （Grant Nos. 11005004, 11175002, 11275098, and 11335002）, the Research Fund for the Doctoral Program of Higher Education （Grant No. 20110001110087）, and the China Postdoctoral Science Foundation （Grant Nos. 2012M520101 and 2013M540011）.
