ZHAO Jiankun, GE Liangquan, ZHANG Qingxian, et al. Simulation study on original characteristic spectrum of gamma radiation field cosmic-induced on lunabase rocks[J]. Nuclear techniques, 2015, 38(11): 110501
DOI:
ZHAO Jiankun, GE Liangquan, ZHANG Qingxian, et al. Simulation study on original characteristic spectrum of gamma radiation field cosmic-induced on lunabase rocks[J]. Nuclear techniques, 2015, 38(11): 110501 DOI: 10.11889/j.0253-3219.2015.hjs.38.110501.
Simulation study on original characteristic spectrum of gamma radiation field cosmic-induced on lunabase rocks
Background: With large differences in mass density
Basalt
KREEP and Dunite are representative and widely distributed on lunar surface. Cosmic-induced ?-ray is produced after energetic particles (Galactic Cosmic Rays
GCR; Solar Particle Event
SPE) impacting on lunabase rocks. Purpose: This study aims at discovering the factors of cosmic-induced ?-ray spectrum and then utilizing the gamma ray data for lunar exploration more efficiency. Methods: A Monte Carlo model for proton-induced gamma ray is designed for the FLUKA simulation software to research cosmic-induced gamma original spectrum. Data analysis is applied to find the relationship between the characteristic spectrum and the densities of lunabase rocks. Results: The model is appropriate to simulate cosmic-induced ?-ray original spectrum. A great variety of original spectrum characteristics
such as energies of main elements
positron annihilation peak and radiation balanced peak
are acquired. Conclusion: A positive correlation is found between mass density of lunabase rock and characteristic peak intensity. These researches for original spectrum can be applied to comparing different lunar gamma-ray spectrum and rock mass density mapping on lunar surface as a reference. Abstract