Sedimentation baseline data on relative isotope frequencies and the relationship of anomalies to evidence for a prehistoric neutron event.

该提案描述了为寻找被认为发生在古印度时代的大质量中子事件的证据而进行的研究。初步观测到的异常被认为是由一个涉及微陨石和大质量中子辐照的全球性宇宙事件来解释的。这一假设是基于对考古出土文物中235、238U和239Pu相对丰度的初步测量得出的。在这项工作中，它的目的是在密歇根州的遗址收集的核心样品，在考古时期土壤未受干扰。然后，这些样品将在我的显微镜下进行研究（寻找微量证据），并在LBNL进行放射性分析（通过绘制铀和钚的数量作为深度的函数）。据称，这将是北美第一个完整的放射性剖面，并将提供关于宇宙引起的放射性的基线测量。建立反复发生的宇宙事件与大规模灭绝之间的关系将影响许多科学领域。

This proposal describes research to search for evidence of a masive neutron event that has been postulated to have occured in the Paleo-Indian era. The preliminary observed anomalies are suggested to be explained by a global cosmic event involving both micrometeorites and massive neutron irradiation. The postulate is based on preliminary measurements of the relative abundances of 235, 238U and 239Pu in archaelogically obtained artifacts. In this work, it is porposed that core samples be collected at Michigan sites with soil undisturbed over archeological times. The samples would then be studied my microscope (looking for micrometereoritical evidence) and by radioanalysis at LBNL (by profiling the amount of Uranium and Plutonium as a function of depth). It is claimed that this would be the first complete radioprofile in North America and would provide a baseline measurement about cosmic-induced radioactivity. Establishing a relation between recurrent cosmic events and mass extinction would affect a number of scientific fields.