Automatic and Interactive Analysis Software for Beta- Gamma Coincidence Systems Used in Ctbt Monitoring

A suite of software has been developed by Veridian Systems as part of the Prototype International Data Center (PIDC) to assist in the analysis of noble gas monitoring data for the Comprehensive Nuclear-TestBan Treaty (CTBT). There are two acceptable noble gas monitoring methods for CTBT verification purposes: high-resolution gamma-ray ( ) spectrometry and beta-gamma ( ) coincidence. Data from spectrometry systems can be analyzed with the existing software at the PIDC and the International Data Center (IDC). Because commercially available software did not exist to analyze data from the coincidence systems, this software has been developed at the PIDC for eventual deployment at the IDC. The suite of software consists of automatic analysis software and CORIANT (COincident Radiation Interactive ANalysis Tool). The automatic analysis software automatically identifies and quantifies radionuclides present in the sample and categorizes the sample based on the type and quantity of radionuclides present. CORIANT is a graphical user interface that gives an analyst the capability to view three-dimensional β-γ coincidence data, view automatic analysis results, view temporal trends in the data, generate reports, and override the automatic analysis if needed. A general description of the automatic analysis software and CORIANT, and the implementation of this software at the PIDC are discussed in this paper.