Proton radioactivity within the generalized liquid drop model with various versions of proximity potentials

• Published in: Communications in theoretical physics Vol. 73; no. 6; pp. 65301 - 65308
• Main Authors: Xin, Yu-Qi, Deng, Jun-Gang, Zhang, Hong-Fei
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.06.2021
• Subjects: Geiger−Nuttall law; GLDM; proximity energy; spherical proton emitter
• ISSN: 0253-6102; 1572-9494
• DOI: 10.1088/1572-9494/abf5e6

In the present work, we systematically investigate the proton radioactivity half-lives of spherical proton emitters adopting a generalized liquid drop model (GLDM) with 16 different proximity potentials, of which the proximity potential Prox.77-13 gives the closest results to the experimental data. Combined with the previous conclusion that the GLDM with proximity potential Prox.77-13 can also best describe α decay half-lives, which makes the model more uniform and consistent. Further, we use the proximity potential Prox.77-13 in GLDM to predict the proton radioactivity half-lives of 14 spherical proton emitters that are allowed energetically but not yet observed experimentally or specifically quantified. Finally, we research the Geiger−Nuttall law for proton radioactivity. The results reveal that the Geiger−Nuttall law can also be well used to study the proton radioactivity half-lives of isotopes with the same orbital angular momentum l .