title: Investigation of cosmic-ray induced background of Germanium gamma spectrometer using GEANT4 simulation.
abstract: In this article, a GEANT4 Monte Carlo simulation toolkit was used to study the response of the cosmic-ray induced background on a High-Purity Germanium (HPGe) gamma spectrometer in the wide energy range, up to 100MeV. The natural radiation background measurements of the spectrometer were carried out in the energy region from 0.04 to 50MeV. The simulated cosmic-ray induced background of the Ge detector was evaluated in comparison with the measured data. The contribution of various cosmic-ray components including muons, neutrons, protons, electrons, positrons and photons was investigated. We also analyzed secondary particle showers induced by the muonic component.
authors.affiliation: Department of Nuclear Physics, Faculty of Physics and Engineering Physics, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam. Electronic address: nqhung@hcmus.edu.vn.
authors.forename: Nguyen Quoc
authors.initials: NQ
authors.lastname: Hung
authors.affiliation: Department of Nuclear Physics, Faculty of Physics and Engineering Physics, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Nuclear Technique Laboratory, VNUHCM-University of Science, 227, Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam.
authors.forename: Vo Hong
authors.initials: VH
authors.lastname: Hai
authors.affiliation: Department of Physics, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Masaharu
authors.initials: M
authors.lastname: Nomachi
keywords: Cosmic-ray induced background; GEANT4 simulation; Ge gamma spectrometer; HPGe; Muons