An improved effective liquid drop model for cluster radioactivity

The effective liquid drop model(ELDM) is improved by introducing an accurate nuclear charge radius formula and an analytic expression for assaulting frequency. Within the improved effective liquid drop model(IMELDM), the experimental cluster radioactivity half-lives of the trans-lead region are calculated. It is shown that the accuracy of the IMELDM is improved compared with that of the ELDM. At last, the cluster radioactivity half-lives that are experimentally unavailable for the trans-lead nuc...     

激发态丰质子核的双质子发射

将有效液滴模型和推广的液滴模型推广至激发态丰质子核的双质子发射半衰期研究,发现这两个模型都能较好地再现双质子发射半衰期的实验数据.基于这两个模型预言了一些核的激发态的双质子发射的半衰期,为将来的实验提供参考,并将上述半衰期与统一裂变模型给出的半衰期进行了比较和分析.此外,以⁹⁴Ag的21~+激发态的双质子发射为例,讨论了衰变能和衰变过程中带走的轨道角动量对其半衰期的影响,发现半衰期对它们的依赖很敏感,半衰期对衰变能的强烈依赖表明了精确测量核质量和激发能的重要性和必要性.     

气垫导轨实验中极限法测速度的分析与讨论

对线性外推法测气轨上滑块的瞬时速度实验进行理论分析,给出了-v-δt和-v-δs函数、其表达的物理意义及实验需满足的条件.