1. [Untitled]
- Author
-
Yukio Kanda, Hiroyuki Noumi, Y. Kato, N. Mokhov, Minoru Takasaki, T. Miura, T. Suzuki, Syuichi Ban, K. Nishikawa, K. Kondo, Masaharu Ieiri, Michifumi Minakawa, K.H. Tanaka, Hideo Hirayama, Y. Oki, Yamanoi, Yoshihito Namito, Hitoshi Ishii, T.-A. Shibata, Yoshihiro Suzuki, and M. Numajiri
- Subjects
Physics ,Radiation ,Radiological and Ultrasound Technology ,Proton ,Soil test ,Astrophysics::High Energy Astrophysical Phenomena ,Monte Carlo method ,Public Health, Environmental and Occupational Health ,Flux ,General Medicine ,Mars Exploration Program ,Fluence ,Nuclear physics ,Soil water ,Radiology, Nuclear Medicine and imaging ,Spallation - Abstract
A soil-shielding benchmark experiment was conducted using secondary particles produced by 12 GeV protons, which were injected into an iron rod surrounded by soil. Induced activities of 22 Na in aluminium (Al) and soil samples were measured and the experiment was simulated by the MARS Monte Carlo code. The induced activities in Al samples were calculated using spallation cross sections and fluence, where the fluence was calculated by the MARS code. The relation between flux density and induced activities in soil was investigated using calculated flux densities: the distribution of the ratio of induced activities in soil samples to the flux densities showed the radial and axial independence. Both saturated activities and distribution coincide with experimental data within the estimated errors. These results indicate the successful simulation by the MARS code.
- Published
- 1998