Determination of the cosmic-ray-induced neutron flux and ambient dose equivalent at flight altitude

37th Brazilian Meeting on Nuclear Physics

Pazianotto, M.T.^1 ; Cortés-Giraldo, M.A.^2 ; Federico, C.A.^3 ; Gonçalez, O.L.^3 ; Quesada, J.M.^2 ; Carlson, B.V.^1

Aeronautics Technological Institute, Physics Department, São José dos Campos, Brazil^1

University of Sevilla, Atomic, Molecular and Nuclear Physics Department, Sevilla, Spain^2

Institute for Advanced Studies, Applied Physics Department, São José dos Campos, Brazil^3

关键词: Ambient dose equivalent;    Ambient dose equivalent rate;    Cosmic ray protons;    Flight altitudes;    Monte Carlo codes;    Neutron spectra;    South Atlantic magnetic anomaly;    Top of the atmospheres;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/630/1/012022/pdf
DOI  :  10.1088/1742-6596/630/1/012022

来源: IOP

【 摘 要 】

There is interest in modeling the atmosphere in the South Atlantic Magnetic Anomaly in order to obtain information about the cosmic-ray induced neutron spectrum and angular distribution as functions of altitude. In this work we use the Monte Carlo codes MCNPX and Geant4 to determine the cosmic-ray-induced neutron flux in the atmosphere produced by the cosmic ray protons incident on the top of the atmosphere and to estimate the ambient dose equivalent rate as function of altitude. The results present a reasonable conformity to other codes (QARM and EXPACS) based on other parameterizations.