Applications of pulse-shape analysis to HPGe gamma-ray detectors

Journal Article · Thu Jul 01 04:00:00 EDT 1999 · Transactions of the American Nuclear Society

OSTI ID:20005810

Schmid, G J; Beckedahl, D A; Blair, J J; Kammeraad, J E

The authors are engaged in a program of applying digital pulse-shape analysis to high-purity germanium (HPGe) gamma-ray detectors for applications in Compton suppression and gamma-ray imaging. Here, the authors present the most recent results in Compton suppression and also outline the current work in gamma-ray imaging. Current work is focusing on applying HPGe pulse-shape analysis techniques to gamma-ray imaging. The idea is to obtain the r,{phi},z coordinates of each gamma-ray interaction for a given event. This would be done using the technique of Ref. 1 to obtain radial information and a segmented outer contact to obtain azimuthal and depth information. By analyzing the generated pulse shapes, one can use a maximum-likelihood algorithm to achieve a position resolution better than the segment size. Once the interaction point locations for a given even are known, and the points are time ordered, standard Compton camera-imaging techniques can be used to create (over many events) an image. Experimental work is now proceeding to measure three-dimensional position resolution with the 36-fold segmented GRETA prototype at Lawrence Berkeley Laboratory.

• Research Organization: Lawrence Livermore National Lab., CA (US)
• OSTI ID: 20005810
• Journal Information: Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 81; ISSN 0003-018X; ISSN TANSAO
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
DATA ANALYSIS
GAMMA DETECTION
HIGH-PURITY GE DETECTORS
PULSE DISCRIMINATORS
USES