Title :
Particle transport simulation for spaceborne, NaI gamma-ray spectrometers
Author :
Dyer, C.S. ; Truscott, P.R. ; Sims, A.J. ; Comber, C. ; Hammond, N.D.A.
Author_Institution :
R. Aerosp. Establ., Farnborough, UK
fDate :
12/1/1988 12:00:00 AM
Abstract :
Radioactivity induced in detectors by protons and secondary neutrons limits the sensitivity of spaceborne gamma-ray spectrometers. Three-dimensional Monte Carlo transport codes were used to simulate particle transport of cosmic rays and innerbelt protons in various representations of the Gamma-Ray Observatory Spacecraft and the Oriented Scintillation Spectrometer Experiment. Results are used to quantify accurately the contributions to the radioactive background, assess shielding options, and examine the effects of detector and spacecraft orientation in anisotropic trapped proton fluxes
Keywords :
Monte Carlo methods; gamma-ray spectrometers; neutron effects; proton effects; sodium compounds; 3D Monte Carlo transport codes; GRO; Gamma-Ray Observatory Spacecraft; NaI gamma-ray spectrometers; NaI spectrometers; OSSE; Oriented Scintillation Spectrometer Experiment; anisotropic trapped proton fluxes; cosmic rays; detector orientation; induced radioactivity; innerbelt protons; particle transport simulation; protons; radioactive background; secondary neutrons; shielding options; spaceborne gamma-ray spectrometers; spacecraft orientation; Cosmic rays; Gamma ray detection; Gamma ray detectors; Monte Carlo methods; Neutrons; Observatories; Protons; Solid scintillation detectors; Space vehicles; Spectroscopy;
Journal_Title :
Nuclear Science, IEEE Transactions on
