A computer simulation of the cosmic-muon background induction in a Ge γ-spectrometer using GEANT
作者： Pavol Vojtyla
DOI: 10.1016/0168-583X(95)00271-5
关键词: Cosmic ray 、 Semiconductor detector 、 COSMIC cancer database 、 Nuclear physics 、 Physics 、 Ionization 、 Spectrometer 、 Muon 、 Shield 、 Bremsstrahlung 、 Particle physics
摘要: A computer simulation of the cosmic-muon background induction in a HPGe γ-spectrometer using GEANT3.15 is described. Relative contributions muon interaction mechanisms parts detector shield were investigated. The direct ionisation Ge-diode, production δ-electrons, e−e+-pair production, decay and bremsstrahlung contribute to induced lower-energy by 2.5%, 81.2%, 10.0%, 4.0% 2.3%, respectively. For muons with momenta below ≈0.7 GeV/c most contributing mechanism. contribution δ-electron reaches maximum at 1.7 extends highest momenta. Above ≈70 dominates. About 97% primary vertices are situated materials. An inner layer that 4.7 cm thick contains 90% all vertices. 3 mm CdCu lining accounts for 15% events. simulated spectrum agrees well an experimental one. Limitations standard GEANT simulating cosmic rays discussed as well.
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