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

关于相对同位素频率的沉积基线数据以及异常与史前中子事件证据的关系。

• 批准号: 9986999
• 负责人: William Topping
• 金额: $ 2万
• 依托单位: Individual Award
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-02-15 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9986999&HistoricalAwards=false
• 关键词: Sedimentation; baseline; data; relative; isotope

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.

这项建议描述了一项研究，以寻找被认为发生在古印度时代的强烈中子事件的证据。初步观测到的异常被认为是由一次涉及微陨石和大量中子辐射的全球宇宙事件解释的。这一假设是基于对古生物制品中235、238U和239Pu相对丰度的初步测量。在这项工作中，建议在考古时期土壤未受干扰的密歇根州遗址采集岩心样本。然后，样品将在我的显微镜下进行研究(寻找微观计量学证据)，并在LBNL进行放射分析(通过描绘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发的辐射活动的基线测量。建立反复发生的宇宙事件和大灭绝之间的关系将影响到许多科学领域。