Calibration of the well-type germanium gamma-ray detector employing two gamma-ray spectra

Since 1992, a method has been under development at IRI to characterise a we ll-type gamma-ray detector by determination of a peak efficiency and a peak -to-total efficiency curve through measurement of a radionuclide emitting c oincident photons, and to compute radionuclide specific counting efficienci es from those curves for "'real" peaks as well as for "sum" peaks. Recent i mprovements to this method have indicated that now, a well-type can be as e asy to calibrate and operate as a coaxial detector, once the software is in place. In this paper, the improved calibration method will be described an d examples of results given. (C) 1998 Elsevier Science B.V. All rights rese rved.