CREPT-MCNP; Code system for efficiency calibration of -ray spectrometer based on the representative point method

Saegusa, Jun; Ogose, Hitoshi; Takamura, Atsushi*; Sugita, Takeshi*

The representative point method is an efficiency calibration method for a -ray spectrometer. A calculation code system, CREPT-MCNP, for implementing the method has been newly developed. CREPT-MCNP can be operated under the Windows PC environment as a GUI based application. The code system estimates the position of the representative point which is intrinsic to each shape of volume sample, and also gives the self-absorption factors to make correction on the efficiencies measured at the representative point with a standard point source. It can deal with photons between 20 keV and 2 MeV with p- or n-type germanium semiconductor detectors.