Nuclear enhancement factor in calculation of Galactic diffuse gamma-rays: A new estimate with DPMJET-3
Masaki Mori (ICRR, U. Tokyo)
TL;DR
This paper presents a new estimate of the nuclear enhancement factor for Galactic diffuse gamma-ray flux calculations, using the DPMJET-3 Monte Carlo simulator, resulting in a value 20% higher than previous estimates in the 6-1000 GeV/nucleon range.
Contribution
It introduces a revised nuclear enhancement factor calculation using DPMJET-3, improving accuracy in gamma-ray flux modeling from cosmic-ray interactions.
Findings
Nuclear enhancement factor is estimated at 1.8-2.0 in 6-1000 GeV/nucleon range.
The new estimate is approximately 20% higher than previous values.
The enhancement factor increases slightly with the energy of cosmic-ray protons.
Abstract
A new calculation of nuclear enhancement factor, used in estimation of Galactic diffuse gamma-ray flux from proton-proton interaction in order to take account of heavy nuclei included in cosmic-rays and interstellar matter, is presented by use of a Monte Carlo simulator, DPMJET-3. A new value of 1.8-2.0 in the energy range of 6-1000 GeV/nucleon, slightly increasing with kinetic energy of projectile cosmic rays, is about 20% larger than previous estimates.
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