超重原子核的重粒子放射性
Nagaraja A Munishamappa1, Rajachari Munirathnam2, Holaly C S Manjunatha3
1Department of Physics, Government First Grade College, Kolar 563101, Karnataka, India.
Radiation protection dosimetry
|December 21, 2023
概括
研究人员探索了超重元素的放射性衰变模式,发现特定的中子数增加了对重粒子放射性 (HPR) 的稳定性. 这项研究有助于理解核天体物理学.
科学领域:
- 核物理和天体物理学
- 放射性衰变研究 放射性衰变研究
背景情况:
- 超重 (SH) 元素 (104 ≤ Z ≤ 126) 呈现复杂的衰变模式.
- 了解这些衰变模式对于核结构理论和天体物理过程至关重要.
研究的目的:
- 研究各种衰变模式,包括重粒子放射性 (HPR),自发裂变 (SF),α衰变和β衰变在SH核中.
- 评估理论模型在预测半衰期和衰变特性方面的准确性.
- 确定影响核稳定性和衰变途径的因素.
主要方法:
- 计算的Q值使用过量Weizsäcker-Skyrme 4+辐射基础函数 (WS4+RBF).
- 使用修改的一般化液滴模型 (MGLDM) 和库伦和近距离潜力模型 (CPPM) 确定集群衰变半衰期.
- 分析了不对称性,中子过量,配对和库伦效应对半衰期的影响.
主要成果:
- 与CPPM相比,MGLDM与实验结果的一致性更好.
- 一个中子数带 (193200) 证明了对HPR的增强稳定性.
- 在SH元素中观察到特定核的HPR (例如86Kr,94Zr) (Z=118,122-126).
- 确定了核作为衰变链的常见最终产品,与天体物理观测相一致.
结论:
- MGLDM是一种可靠的模型,用于预测SH元素的衰变半衰期.
- 特定的核配置提供了增强的稳定性,指导未来的合成工作.
- 这些发现有助于理解极端宇宙环境中的核合成和核天体物理学.
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