Set Up And Systems Test Of 4πβ+4πγ Counting Medthod Device Of Activity Measurement

Along with the development of the analysis of nucleus fission burn-up,activation analysis of neutron or charged particle,and precisely measurement of nuclear data, the request for precisely measurement the radioactivity is high and high.Especially for activity,half-life,γray emission probability and any other nuclear parameters of short-lived nuclides.So many methods appeared,4πβ+4πγcounting method in this article is a new method to measure the activity and other nuclear parameters.4πβ+4πγcounting method device of measurement activity is build upon 4πγNaI(T1)counting method and coincidence method.The VNYS source is placed in the 4πβproportional counter located over the HPGe detector,and the counter is inserted into the well-type NaI(T1)detector,measure the particles(β,αor X ray) andγray come from every nuclear decay at the same time.The compose and structure of 4πβ+4πγcounting method device of measurement activity,principle of activity measurement andγray emission probability and process of debug the performances of all detectors has been described in detail.Describe the composition and function of MPA-3 multi-parameter acquisition system in briefly.The article detailedly describe the course of measurement activity by 4πβ+4πγcounting method and the course of data processing using method of extrapolation,the experimental results are compared with the results of HPGeγenergy spectrum method and coincidence method.Completed the initial installation of the 4πβ+4πγcounting method device of measurement activity,then the existing problems of the experimental equipments are found out and put forward suggestions for improvement.