arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0811.1619nucl-th
收藏

超重核中的Alpha decay链

Alpha decay chains from superheavy nuclei

C. Samanta

摘要:

在裂变不稳定性的海洋中,超稳定核的魔法岛被预测为Z=114,124或126,N=184,Z=120,N=172。这些具有高Z和N的裂变幸存的超重核是否能存活足够长的时间以供检测,或者在很短的时间内经历α衰变仍然是一个悬而未决的问题。在WKB框架下,采用密度相关的M_3Y相互作用,计算了130 < Z < 100核的α衰变半衰期。计算结果与实验数据吻合得很好。在Z = 106-108,N=160-164的小岛/半岛区域,Z=106,N =162的裂变幸存Sg核预计具有最高的α衰变半衰期~ 3.2小时。Z > 118的超重核的α衰变半衰期为微秒或更短。

英文摘要:

Magic islands for extra-stable nuclei in the midst of the sea of fission-instability were predicted to be around Z=114, 124 or, 126 with N=184, and Z=120, with N=172. Whether these fission-survived superheavy nuclei with high Z and N would live long enough for detection or, undergo alpha-decay in a very short time remains an open question. Alpha-decay half lives of nuclei with 130 < Z < 100 have been calculated in a WKB framework using density-dependent M3Y interaction with Q-values from different mass formulae. The results are in excellent agreement with the experimental data. Fission survived Sg nuclei with Z=106, N=162 is predicted to have the highest alpha-decay half life ~ 3.2 hrs in the Z=106-108, N=160-164 region called, small island/peninsula. Superheavy nuclei with Z > 118 are found to have alpha-decay half lives of the order of microseconds or, less.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑