title: A novel natural environment background model for Monte Carlo simulation and its application in the simulation of anticoincidence measurement.
abstract: This study proposes a novel natural environment background model by modeling brief environment conditions. It uses Geant4 program to simulate decays of (238)U, (232)Th, and (40)K in soil and obtains compositions of different-energy gamma rays in the natural environment background. The simulated gamma spectrum of the natural environment background agrees well with the experimental spectrum, particularly above 250 keV. The model is used in the simulation of anticoincidence measurement, indicating that the natural environment background can be decreased by approximately 88%, and the Compton attenuation factor is 2.22. The simulation of anticoincidence measurement can improve the minimum detectable activity (MDA) of the detection system.
authors.affiliation: Chengdu University of Technology, Chengdu, Sichuan 610059, People's Republic of China.
authors.forename: Sangang
authors.initials: S
authors.lastname: Li
authors.affiliation: Chengdu University of Technology, Chengdu, Sichuan 610059, People's Republic of China. Electronic address: wl@cdut.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.affiliation: Chengdu University of Technology, Chengdu, Sichuan 610059, People's Republic of China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu, Sichuan 610059, People's Republic of China; Southwest University of Technology, Mianyang, Sichuan 621010, People's Republic of China.
authors.forename: Xianguo
authors.initials: X
authors.lastname: Tuo
authors.affiliation: Chengdu University of Technology, Chengdu, Sichuan 610059, People's Republic of China; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu, Sichuan 610059, People's Republic of China.
authors.forename: Mingzhe
authors.initials: M
authors.lastname: Liu
authors.affiliation: Chengdu University of Technology, Chengdu, Sichuan 610059, People's Republic of China.
authors.forename: Fuliang
authors.initials: F
authors.lastname: Yao
authors.affiliation: Chengdu University of Technology, Chengdu, Sichuan 610059, People's Republic of China.
authors.forename: Fengqing
authors.initials: F
authors.lastname: Leng
authors.affiliation: Chengdu University of Technology, Chengdu, Sichuan 610059, People's Republic of China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Cheng
authors.affiliation: Chengdu University of Technology, Chengdu, Sichuan 610059, People's Republic of China.
authors.forename: Ting
authors.initials: T
authors.lastname: Cai
authors.affiliation: Chengdu University of Technology, Chengdu, Sichuan 610059, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhou
keywords: Anticoincidence measurement; Geant4; Minimum detectable activity; Monte Carlo simulation; Natural environment background