Cross-talk between two planar germanium detectors in head-on geometry

Abstract

Coincident detection of radiation, which, following the interaction of incident radiation in one detector, escapes from it and is absorbed in another detector, was studied. Several prominent peaks due to the transfer of energy by germanium characteristic radiation were observed. Their well defined positions allow accurate calibration of energy scales, and the time spectra corresponding to the peaks make possible a detailed analysis of the operation of the coincidence, a good definition of time intervals and of the coincidence efficiency. The ratios of numbers of pulses in the peaks allow an accurate check of the position of the source between the two detectors. The calculated values of the numbers of counts in the peaks are in agreement with the measured values, presenting an independent check of the efficiency of the coincidence. Among other possible modes of transfer of radiation from one into the other detector bremsstrahlung radiation of photoelectrons ejected in one germanium detector and detected in the other was calculated. © 1986.