Two-proton radioactivity from excited states within the generalized liquid drop model
Two-proton radioactivity from excited states within the generalized liquid drop model
Yi Long 1Yue-Hua Wang 1Dong Zhan 1Shuang Li 1Jun-Gang Deng 1Lin Mu 1Jun-Hao Cheng 2Hong-Fei Zhang3
作者信息
- 1. Center for Astronomy and Space Sciences, China Three Gorges University, Yichang 443002, China;College of Mathematics and Physics, China Three Gorges University, Yichang 443002, China
- 2. Southwestern Institute of Physics, Chengdu 610003, China
- 3. School of Physics, Xi’an Jiaotong University, Xi’an 710049, China
- 折叠
摘要
Unlike ground-state two-proton (2p) radioactivity, excited-state 2p emission is generally characterized bylarger decay energies and non-zero angular momentum, making it a sensitive probe of the nuclear structure ofextremely proton-rich nuclei. However, reliable theoretical descriptions of excited-state 2p radioactivity halflivesremain challenging. To examine whether the generalized liquid drop model (GLDM) with the improvedproximity energy Prox. 77-Set 13, whose parameters were optimized using ground-state 2p radioactivity data,can be extended to excited-state 2p emission, this work calculates the half-lives of 14O∗, 17Ne∗, 18Ne∗, 29S∗,and 94Ag∗. The present calculations are compared with experimental data and with results from the effectiveliquid drop model (ELDM), the unified fission model (UFM), and the Coulomb and proximity potentialmodel (CPPM). The GLDM results agree well with the available experimental data and with other theoreticalcalculations, supporting the applicability of the GLDM with improved proximity energy to excited-state 2p radioactivity.The dependence of the half-life on the decay energy and angular momentum is also systematicallyinvestigated, providing further insight into the decay properties of exotic proton-rich nuclei.
Abstract
Unlike ground-state two-proton (2p) radioactivity, excited-state 2p emission is generally characterized bylarger decay energies and non-zero angular momentum, making it a sensitive probe of the nuclear structure ofextremely proton-rich nuclei. However, reliable theoretical descriptions of excited-state 2p radioactivity halflivesremain challenging. To examine whether the generalized liquid drop model (GLDM) with the improvedproximity energy Prox. 77-Set 13, whose parameters were optimized using ground-state 2p radioactivity data,can be extended to excited-state 2p emission, this work calculates the half-lives of 14O, 17Ne, 18Ne, 29S,and 94Ag. The present calculations are compared with experimental data and with results from the effectiveliquid drop model (ELDM), the unified fission model (UFM), and the Coulomb and proximity potentialmodel (CPPM). The GLDM results agree well with the available experimental data and with other theoreticalcalculations, supporting the applicability of the GLDM with improved proximity energy to excited-state 2p radioactivity.The dependence of the half-life on the decay energy and angular momentum is also systematicallyinvestigated, providing further insight into the decay properties of exotic proton-rich nuclei.关键词
Two-proton radioactivity/Generalized liquid drop model/Half-life/excited stateKey words
Two-proton radioactivity/Generalized liquid drop model/Half-life/excited state引用本文复制引用
Yi Long,Yue-Hua Wang,Dong Zhan,Shuang Li,Jun-Gang Deng,Lin Mu,Jun-Hao Cheng,Hong-Fei Zhang.Two-proton radioactivity from excited states within the generalized liquid drop model[EB/OL].(2026-10-23)[2026-10-27].https://chinaxiv.org/abs/202610.00195.学科分类
原子能技术基础理论
