丰中子核同分异构体行为对直接跃迁不对称性的敏感性
Sensitivity of Neutron-Rich Nuclear Isomer Behavior to Uncertainties in Direct Transitions
摘要：
核同质异能态在核合成的快中子俘获过程（r过程）中被填充。r过程可能覆盖很宽的温度范围，可能从几十GK（几MeV）开始，然后随着物质从事件中喷出而冷却。随着r-过程环境的冷却，同分异构体可以冻结出热平衡或直接填充为天体物理同分异构体（天体异构体）。天体天体物理的两个关键行为--基态<->同质异能跃迁速率和热化温度--是由原子核状态对之间的直接跃迁速率决定的。我们进行了敏感性研究，以限制未知的转变对天体行为的影响。我们还介绍了一个分类的天体，描述了他们在炎热的环境中的潜在影响。我们提供了一个富含中子的同分异构体表，其中包括天体单体类型、热化温度和关键的未测跃迁速率。
英文摘要：
Nuclear isomers are populated in the rapid neutron capture process (r process) of nucleosynthesis. The r process may cover a wide range of temperatures, potentially starting from several tens of GK (several MeV) and then cooling as material is ejected from the event. As the r-process environment cools, isomers can freeze out of thermal equilibrium or be directly populated as astrophysical isomers (astromers). Two key behaviors of astromers -- ground state<->isomer transition rates and thermalization temperatures -- are determined by direct transition rates between pairs of nuclear states. We perform a sensitivity study to constrain the effects of unknown transitions on astromer behavior. We also introduce a categorization of astromers that describes their potential effects in hot environments. We provide a table of neutron-rich isomers that includes the astromer type, thermalization temperature, and key unmeasured transition rates.
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