Title :
Analysis of radiation damaged HPGe detectors with a new algorithm
Author :
Koenen, M. ; Bruckner, J. ; Fabian, U. ; Kruse, H. ; Wanke, H. ; Schroeder, A.N.F. ; Stan, R. ; Evans, L.G. ; Trombka, J.I. ; Drake, D.M. ; Englert, P.A.J. ; Dempsey, J.
Author_Institution :
Max-Planck-Inst. fur Chem., Mainz, Germany
fDate :
6/1/1996 12:00:00 AM
Abstract :
After being irradiated by high-energy protons, the energy resolution of HPGe detectors degrade extensively. Resulting line shapes depend mostly on detector geometry and doping type. To improve the analysis of measured gamma-ray spectra of HPGe detectors, new algorithms were developed. Since trapping in radiation damaged HPGe detectors is predominantly hole trapping, the full energy peak is the integration of absorption events produced within the detector at various. Distances from the positive contact. Implementing that information into fit algorithms, peaks produced by detectors irradiated with 6-108 protons/cm2 could be analyzed. The tailing structure at the low energy side was included in the algorithm. Analog algorithms were successfully applied to damaged coaxial detectors of either doping type. Using these algorithms, it was possible to evaluate transients in damaged detectors after having been exposed to room temperature. Also, the development of tail broadening could be examined
Keywords :
gamma-ray detection; germanium radiation detectors; hole traps; proton effects; Ge; absorption events; damaged coaxial detectors; detector geometry; energy resolution; fit algorithms; high-energy protons; hole trapping; measured gamma-ray spectra; radiation damaged HPGe detectors; tail broadening; tailing structure; Algorithm design and analysis; Degradation; Doping; Energy resolution; Event detection; Gamma ray detection; Geometry; Protons; Radiation detectors; Shape;
Journal_Title :
Nuclear Science, IEEE Transactions on
