Statistics – Computation
Scientific paper
Oct 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rmxaa..32..135a&link_type=abstract
UNAM: Mexican Review of Astronomy and Astrophysics, vol. Volume 32, p. 135-142
Statistics
Computation
Collimators, Gamma Ray Telescopes, Energy Spectra, Atmospheric Effects, Gamma Rays, Monte Carlo Method, Electromagnetic Interactions, Radioactivity, Nuclear Interactions, Computation, Capture Effect
Scientific paper
The Monte Carlo method is applied to study the transmission of a lead collimator 3 cm thick to gamma radiation in the energy range 1-100 MeV, which was part of a gamma-ray telescope. The computation gives the continuum spectrum and the 511 keV line intensity emerging from the inner face of the collimator as the result of the electromagnetic interactions occurring inside it. We also discuss the resulting background from the decay of the radioactive nuclei generated by the nuclear interactions (spallation) of cosmic rays, and neutron capture in lead. The overall results show that the induced instrumental background does not significantly reduce the detector sensitivity as compared to that expected of an ideally clean collimator.
Azcarate I. N.
Mugherli V. J.
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