High Power Laser and Particle Beams, Volume. 35, Issue 5, 059001(2023)
Measurement and simulation of terrestrial atmospheric neutron spectrum in typical regions of China
Figures & Tables(12)
Fig. 3. Measured atmospheric neutron spectra at different locations
Fig. 4. Atmospheric neutron differential flux as a function of energy at different measurement sites calculated by EXPACS model
Fig. 5. Comparison between calculated results and measured data of atmospheric neutron spectrum
Fig. 6. Atmospheric environment modeling in Monte Carlo transport simulations
Fig. 7. Primary galaxy cosmic ray particle spectra used in Monte Carlo simulations
Fig. 8. Atmospheric neutron spectra at different altitudes obtained by Monte Carlo simulations
Fig. 9. Comparison of atmospheric neutron spectra obtained from field measurement, EXPACS model calculation and Monte Carlo simulation in Guangzhou
Table 1. Location information of atmospheric neutron spectrum measurement
View tableView in ArticleTable 1. Location information of atmospheric neutron spectrum measurement
measurement location longitude latitude altitude/m Guangzhou 113°40′55″E 23°16′38″N 42 Lanzhou 103°15′36″E 35°50′40″N 1780 Lhasa 91°7′23″E 29°39′39″N 3634 Yangbajing 90°31′32″E 30°5′56″N 4277
Table 2. Probability of inelastic interaction between different particles and atmospheric atoms in cascade reaction process
View tableView in ArticleTable 2. Probability of inelastic interaction between different particles and atmospheric atoms in cascade reaction process
particle types probability/% neutron 61.0 proton 18.6 4-helium 18.3 heavy ion 1.4 muon− 0.2 pion+，pion− 0.2
Table 3. Generation probability of secondary particles in inelastic interactions
View tableView in ArticleTable 3. Generation probability of secondary particles in inelastic interactions
particle types probability/% neutron 31.6 proton 25.2 4-helium 19.2 photon 7.8 pion+，pion− 6.0 deuteron，triton 4.6
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Chao Peng, Zhifeng Lei, Zhangang Zhang, Shaohua Yang, Ping Lai, Guoguang Lu. Measurement and simulation of terrestrial atmospheric neutron spectrum in typical regions of China[J]. High Power Laser and Particle Beams, 2023, 35(5): 059001
Paper Information
Category: Advanced Interdisciplinary Science
Received: Oct. 25, 2022
Accepted: Feb. 10, 2023
Published Online: May. 6, 2023
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