isotope source meaning in Chinese

同位素源

In experiment , the alignment and calibration to the monochromator were described firstly . then , a gas - flow proportional counter and the multi - channel analyzer ( mca ) are calibrated by the radio isotope source 55fe , and the dead time , counting rate plateau and x - ray linearity have been measured
最后利用同步辐射光源做激发源，在掠出射方式下研究了si片上不同厚度单层cr膜和双层fe v膜样品产生的荧光光强和掠出射角的对应关系。
In the foreign country , neutron induced prompt gamma - ray analysis ? ipga was used to analyze the elements in substance and has been used in real production and industry " s analysis on line now . in our country , the method has been studied and used from 70 " s and has been more and more perfect . however , the neutron source they used is the isotope source
在国外，早已开始采用中子感生瞬发射线分析法( nipga )对物质进行元素分析，如今这种方法已经应用于实际生产和工业在线分析，国内在八十年代也开始研究、应用这种方法，如今已日趋完善，然而，他们使用的中子源绝大多数仍然是同位素中子源，做为一种可行性实验方法研究，我们采用脉冲中子发生器做为中子源，自行研制的线性门电路和多道脉冲幅度分析器相配合，获取非弹性散射和俘获谱，对物质进行元素分析。