Systematic study of proton radioactivity based on Gamow--like model with a screened electrostatic barrier
| Autor: | Jun-Hao Cheng, Jun-Gang Deng, Xi-Jun Wu, Xiao-Hua Li, Jiu-Long Chen |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Nuclear and High Energy Physics Work (thermodynamics) Angular momentum Proton Nuclear Theory 010308 nuclear & particles physics Half-life FOS: Physical sciences 01 natural sciences Nuclear Theory (nucl-th) 0103 physical sciences Coulomb Electric potential Atomic physics Nuclear Experiment (nucl-ex) 010306 general physics Nuclear Experiment Nuclear radius Nuclear theory |
| Popis: | In the present work we systematically study the half--lives of proton radioactivity for $51 \leq Z \leq 83$ nuclei based on the Gamow--like model with a screened electrostatic barrier. In this model there are two parameters while considering the screened electrostatic effect of Coulomb potential with the Hulthen potential i.e. the effective nuclear radius parameter r_0 and the screening parameter a. The calculated results can well reproduce the experimental data. In addition, we extend this model to predict the proton radioactivity half--lives of 16 nuclei in the same region within a factor of 2.94, whose proton radioactivity are energetically allowed or observed but not yet quantified. Meanwhile, studying on the proton radioactivity half-life by a type of universal decay law has been done. The results indicate that the calculated half--lives are linearly dependent on Coulomb parameter with the same orbital angular momentum. 12 pages, 5 figures, accepted by Journal of Physics G: Nuclear and Particle Physics |
| Databáze: | OpenAIRE |
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