Monte-Carlo calculations of Ge detector escape-peak efficiencies

Journal Article · Mon Apr 01 04:00:00 EST 1991 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/23.289300· OSTI ID:5044375

Owens, A; Gehrels, N; Teegarden, B J ^[1]; Pascarelle, S M ^[2]

---

1. National Aeronautics and Space Administration, Greenbelt, MD (United States). Goddard Space Flight Center
2. Dept. of Astronomy, Univ. of Maryland, MD (US)

The authors presents calculated first and second escape peak efficiencies for a variety of n-type coaxial Ge detectors using the Monte-Carlo method. The results are given for right circular cylindrical geometries of size ranging from 3 cm diameter {times} 3 cm thick to 8 cm diameter {times} 8 cm thick. For completeness, we also list the intrinsic interaction and photopeak efficiencies for energies ranging from 20 keV to 20 MeV. The calculations have been tested against experimental measurement and found to be in agreement to within the quoted errors (typically 10%). It is found that the ratio of the second escape peak efficiency to the first escape peak efficiency, R, is approximately independent of energy for small detector volumes but has a weak power law energy dependence for large volumes. Finally, it is shown that R also varies as an inverse power law of the active volume.

• OSTI ID: 5044375
• Journal Information: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Vol. 38:2; ISSN 0018-9499; ISSN IETNA
• Country of Publication: United States
• Language: English

Related Subjects

440104* -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
CALCULATION METHODS
ENERGY DEPENDENCE
ESCAPE PEAKS
GE SEMICONDUCTOR DETECTORS
MATHEMATICS
MEASURING INSTRUMENTS
MONTE CARLO METHOD
NUMERICAL ANALYSIS
PEAKS
RADIATION DETECTORS
SEMICONDUCTOR DETECTORS