利用γ射线对死后经过时间推断的研究

发布时间：2018-06-28 20:33

本文选题：死后经过时间 + 死亡时间推断　；参考：《郑州大学》2007年硕士论文

【摘要】： 目的研究小白鼠死后对γ射线的吸收变化规律，探讨其用于死后经过时间推断的可能性，为死后经过时间的推断寻找一种新的途径。方法建立小白鼠死亡模型，，模拟春夏秋冬各季节的气候特征把小白鼠死亡模型分为四组，进行恒温保存。利用γ射线的吸收特性，通过闪烁计数器对四组模型分别进行一定时间间隔的测量，利用origin软件处理所得数据并进行统计学分析，探讨和研究小白鼠死后对γ射线的吸收变化规律与小白鼠死后经过时间的关系。结果恒温放置的小白鼠死亡模型对γ射线的吸收随着组织水分的散失和尸体的腐烂而逐渐增大，其辐射强度随死后经过时间的延长而减小，并且呈现一定的相关回归关系。结论小白鼠死后对γ射线的辐射强度和死后经过时间呈近似的指数衰减的相关关系。所以小白鼠死后对γ射线的吸收变化规律可望用于死后经过时间的推断。
[Abstract]:Objective to study the changes of 纬 -ray absorption in postmortem mice and to explore the possibility of using it to infer postmortem time, and to find a new way to infer postmortem time. Methods the death model of mice was established, and the climatic characteristics of spring, summer, autumn and winter were simulated. The death models were divided into four groups and preserved at constant temperature. Using the absorption characteristic of 纬 -ray, the four groups of models were measured by scintillation counter at certain time intervals, and the data were processed by origin software and analyzed statistically. To study the relationship between the changes of 纬-ray absorption and the postmortem time of mice. Results the absorption of 纬-ray in the death model of mice placed at constant temperature increased with the loss of water in the tissue and the decay of the corpse, and the radiation intensity decreased with the prolongation of the time after death, and there was a certain correlation regression relationship between the absorption of 纬-ray and the decay of the dead body. Conclusion there is an approximate exponential correlation between the radiation intensity of postmortem 纬-ray and the postmortem time of mice. Therefore, the changes of 纬-ray absorption in mice after death may be used to infer the postmortem time.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2007
【分类号】：D919

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