图 书 馆
透过不同的眼睛。。。微米级核显微镜四十年Through different eyes... Forty years of nuclear microscopy at the micrometre scale |
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| 课程网址: | http://videolectures.net/kolokviji_grime_different_eyes/ |
| 主讲教师: | Geoffrey Grime |
| 开课单位: | 塞瑞大学 |
| 开课时间: | 2020-01-15 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | 2020 marks the fortieth anniversary of the first published images using ion beam analysis (IBA) at a spatial resolution of 1 micrometre. IBA exploits the reaction products emitted when samples are exposed to a beam of megaelectron volt ions from a small nuclear accelerator. These include light and X-rays from atomic electrons, particles and gamma rays from the nuclei and forward or backward scattered beam particles. These can provide elemental concentrations with high sensitivity, specificity and accuracy. In many cases, depth profiles, structural and chemical information can also be measured. In the late 1970s, our group in Oxford developed the techniques for focusing high energy ion beams to micrometre size diameters and so produced the first imaging nuclear microprobe. Now the technique is available in laboratories across the world and is applied in fields ranging from archaeology to zoology. In this talk, we will outline the background and history of the nuclear microprobe and describe two recent projects carried out at the University of Surrey which highlight the wide range of applications: the reconstruction of the lost image on a weathered stained-glass window and identifying the metal atoms in protein molecules. |
| 关 键 词: | 离子束分析; 小型核加速器; 伽马射线 |
| 课程来源: | 视频讲座网 |
| 数据采集: | 2021-11-22：nkq |
| 最后编审: | 2021-11-22：nkq |
| 阅读次数: | 52 |