一个超低温中子捕捉装置的剖面观。其捕捉是透过在超流体液态氦-4中的光子与低温中子(11 K)之间的非弹性散射作用来达成。被捕捉的中子在贝它衰变时可被侦测到，因为在超流体中带有能量的衰变电子可游离氦原子导致电子动能有效地转换成光子(闪烁)。(图片提供：NIST)

Half section view of an ultracold neutron trapping apparatus. The trap is loaded through inelastic scattering of cold neutrons (11 K) with phonons in superfluid helium-4. Trapped neutrons are detected when they beta decay; energetic decay electrons ionize helium atoms in the superfluid resulting in efficientconversion of electron kinetic energy into light (scintillation). (Image courtesy of NIST.)





课程重点



本课程包括许多课堂讲稿、作业 与 测验。

This course includes extensive lecture notes, assignments and exams.



课程描述



本课程是介绍游离辐射的基本特性，与其在医学、工业、科学、与环境研究上使用的介绍。我们讨论到天然与人造辐射源、能量沉积与剂量计算、各种辐射的物理、化学和生物的过程与效应和其使用之例子、辐射防护原理。除了需撰写一篇论文之外，也需以上台报告。 本课程原由 Jacquelyn Yanch 博士所规划。因此，此处的教材有许多来自她的研究。



This course is an introduction to basic properties of ionizing radiations and their uses in medicine, industry, science, and environmental studies. Discusses natural and man-made radiation sources, energy deposition and dose calculations, various physical, chemical, and biological processes and effects of radiation with examples of their uses, and principles of radiation protection. Term paper and oral presentation of paper required.



This course was originally developed by Dr. Jacquelyn Yanch. As such, significant portions of the materials presented here were derived from her work.

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