Several short-lived radionuclides (SLRs) were present in the first few million years of Solar System history. Their abundances have profound impact on the timing of stellar nucleosynthesis events prior to Solar System formation, chronology of events in the early Solar System, early solar activity, heating of early-formed planetesimals, and chronology of planet formation. Isotopic analytical techniques have undergone dramatic improvements in the past decade, leading to tighter constraints on the levels of SLRs in the early Solar System and on the use of these nuclides for detailed chronological studies. This review emphasizes the abundances of SLRs when the Solar System formed and how we know them, and briefly discusses the origins of these nuclides and applications in planetary science.

中文翻译：

---

早期太阳系中的短命核素：丰度、起源和应用


在太阳系历史的最初几百万年中，存在着几种短命放射性核素（SLR）。它们的丰度对太阳系形成之前恒星核合成事件的时间、早期太阳系事件的年表、早期太阳活动、早期形成的星子的加热以及行星形成的年表产生深远的影响。同位素分析技术在过去十年中经历了巨大的进步，导致对早期太阳系中 SLR 水平以及使用这些核素进行详细年代研究的限制更加严格。这篇综述强调了太阳系形成时 SLR 的丰度以及我们如何了解它们，并简要讨论了这些核素的起源及其在行星科学中的应用。