超灵敏小型回旋加速器质谱计X射线本底崐的来源及其抑制方法  

M ethods of reducing X-rays background in super sensitive mini-cyclotron accelerator mass spectrometer

作　　者：卢相顺[1] 陈茂柏[1] 李德明[1] 徐森林[1] 陈国生[1] 沈立功[1] 刘永好[1] 张岳祥[1] 

机构地区：[1]中国科学院上海原子核研究所

出　　处：《核技术》1998年第7期403-406,共4页Nuclear Techniques

基　　金：国家自然科学基金;中国科学院上海市自然科学基金;国际原子能机构资助

摘　　要：通过理论分析和实验测量，基本上确定了Ｘ射线本底产生的原因，并采取了有效的克服办法。使Ｘ射线引起的本底计数降低到原来的２／５。极大地提高了１４Ｃ的探测效率和样品测量的精确度及丰度灵敏度。Through theoretical analysis and careful experiments, the origin of X- ray background in the mini- cyclotron was deduced and some methods to suppress it were described. As a result, the background counts have been reduced to 2/5 of the original value, which has greatly improved the detection efficiency, measurement precision and abundance sensitivity of the sensitive mini- cyclotron accelerator mass Spectrometer.

关 键 词：X射线 小型 回旋加速器 本底 屏蔽 质谱计 

分 类 号：TL817.1[核科学技术—核技术及应用]