Application of a semi-empirical Ge(Li) detector calibration technique for large-volume samples

A previously developed semi-empirical method for the calculation of the absolute peak efficiency of coaxial Ge(Li) detectors for large volume samples is reviewed and applied using a computer model and experimental determinations of calibration parameters. The efficiencies calculated for extended air, lucite and aluminum source materials are compared with those obtained with spiked sample calibrations and point source calibrations. The errors are within +-5% in most cases. For the calibrations, two versions of computer programs written in FORTRAN are presented