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

该提案描述了寻找被假定发生在古印度时代的大规模中子事件证据的研究。 初步观察到的异常，建议解释一个全球性的宇宙事件，涉及微陨石和大量的中子照射。 这一假设是基于对考古学获得的文物中235、238 U和239 Pu相对丰度的初步测量。 在这项工作中，它是主张核心样品收集在密歇根州的网站与土壤原状超过考古时代。 然后，这些样品将被我的显微镜（寻找微计量学证据）和LBNL的放射性分析（通过分析铀和钚的数量作为深度的函数）进行研究。 据称，这将是北美第一个完整的放射性剖面，并将提供有关宇宙诱导放射性的基线测量。 在反复发生的宇宙事件和大规模灭绝之间建立联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.