首页>
外国专利>
Neutron activation analysis using a standardized sample container for determining the neutron flux
Neutron activation analysis using a standardized sample container for determining the neutron flux
展开▼
机译：使用标准样品容器进行中子活化分析以确定中子通量
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention relates to a method for the nondestructive element analysis of large-volume samples using neutron radiation and to a device for carrying out the method. In the method according to the invention, the sample is irradiated with fast neutrons in a pulsed manner and the gamma radiation emitted by the sample is measured. The amount of an element that is contained in the sample is evaluated after the base signal is subtracted from the area of the photopeak that the element causes in a plot of count rate versus energy. According to the invention, the gamma radiation emitted by a sub-area of the sample, the composition of which is known, is evaluated in order to determine the neutron flux at the location of the sample. For example, a metal enclosure of the sample, such as a standard waste barrel, can be selected as such a sub-area. A novel evaluation technique on the basis of multi-parameter analysis can quantify the presence of individual elements therefrom more quickly and more accurately than the prior art. The device is characterized by a sample chamber that is surrounded by a neutron-reflecting material, in particular graphite.
展开▼
