用不同版本的邻近形式系统研究α衰变
Systematic study of α decay using different versions of proximity formalism
摘要：
寻找描述α衰变过程的最佳模型是核物理学中一个古老而持续的挑战。本文在WKB近似下，采用28种不同的邻近势模型，系统地研究了344个原子核（52 ≤ Z ≤ 107）的基态-基态有利跃迁的α衰变半衰期。本研究介绍了最佳的接近版本与最少的偏差相对于实验值。Prox的模型。77-set 4，Prox. 77-集合5和Dutt 2011（均方根偏差<1）的α衰变半衰期预测结果优于其他模型。与聚变研究的比较表明，Dutt 2011模型不仅适合于α衰变研究，而且适合于预测重离子聚变反应中的势垒特性。对偶-偶、偶-奇、奇-偶和奇-奇核重复计算α衰变半衰期。这项详细的比较研究表明，对于这些版本，具有RSD <0.6的偶-偶核的半衰期显示出比偶-奇、奇-偶和奇-奇核更小的偏差。
英文摘要：
Finding the best model to describe the α-decay process is an old and ongoing challenge in nuclear physics. The present work systematically studied α-decay half-lives for the favored ground-state-to-ground-state transitions of 344 isotopes of nuclei with 52 <= Z <= 107 using 28 versions of the proximity potential model in the framework of the WKB approximation. The present study introduces the best proximity versions with the fewest deviations with respect to experimental values. The models for Prox. 77-set 4, Prox. 77-set 5, and Dutt 2011 with the root-mean-square deviations (RMSDs) of <1 were found to predict α-decay half-lives better than the other models. Comparison with fusion studies shows that Dutt 2011 is an appropriate model both for α-decay studies and for prediction of the barrier characteristic in heavy-ion fusion reactions. The calculation of α-decay half-lives were repeated for even-even, even-odd, odd-even, and odd-odd nuclei. This detailed comparative study reveals that for these versions the half-lives of the even-even nuclei with RMSDs of <0.6 show less deviation than the even-odd, odd-even, and odd-odd nuclei.
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