冷却白矮星中的锕系结晶和fission反应
Actinide crystallization and fission reactions in cooling white dwarf stars
摘要：
冷却的白矮星（WD）开始结晶时形成的第一批固体预计将大大富含锕系元素。这是因为WD物质的熔点标度为$Z^{5/3}$，且锕系元素具有最大的电荷$Z$。我们估计，这些固体可能富含锕系元素，它们可以支持裂变链式反应。这种反应可能会点燃碳燃烧，并导致热核超新星（SN Ia）中孤立WD的爆炸。我们的机制可能解释超新星Ia与sub-Bracrasekhar喷出物质量和短延迟时间。
英文摘要：
The first solids that form as a cooling white dwarf (WD) starts to crystallize are expected to be greatly enriched in actinides. This is because the melting points of WD matter scale as $Z^{5/3}$ and actinides have the largest charge $Z$. We estimate that the solids may be so enriched in actinides that they could support a fission chain reaction. This reaction could ignite carbon burning and lead to the explosion of an isolated WD in a thermonuclear supernova (SN Ia). Our mechanism could potentially explain SN Ia with sub-Chandrasekhar ejecta masses and short delay times.
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