GAMMASPHERE: Correction technique for detector charge trapping
GAMMASPHERE uses 110 very large germanium detectors. Such detectors exhibit charge trapping effects on energy resolution initially due to a native electron trap that is present in virtually all germanium. Furthermore, radiation damage is a serious problem in GAMMASPHERE experiments, producing hole traps that degrade resolution and eventually require annealing to restore the original performance. The technique discussed here uses the current pulse shape from a detector to develop a parameter related to the radius of the largest interaction in the ``track`` of a gamma ray in the detector. Since the charge trapping loss in a signal can be related to the distance carriers travel, the ``radius`` parameter can be used by software to apply a trap correction to the signal.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 10109410
- Report Number(s):
- LBL-33991; CONF-931107-24; CONF-9311114-7; ON: DE94004554; TRN: 94:001502
- Resource Relation:
- Conference: 1993 IEEE nuclear science symposium and medical imaging conference,San Francisco, CA (United States); San Francisco, CA (United States),2-5 Nov 1993; 4-6 Nov 1993; Other Information: PBD: Nov 1993
- Country of Publication:
- United States
- Language:
- English
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