Physics
Scientific paper
May 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975cajph..53..917y&link_type=abstract
Canadian Journal of Physics, vol. 53, May 1, 1975, p. 917-921.
Physics
Cosmic Rays, Gamma Rays, Interstellar Radiation, Nuclear Radiation, Abundance, Inelastic Collisions, Ion Production Rates, Light Elements, Radiant Flux Density
Scientific paper
The upper limits on an interstellar flux of low-energy cosmic rays are derived from interpretations of the gamma-ray spectral feature at 473 + or - 30 keV, the enhancement in the flux of galactic diffuse gamma rays, the ionization rate of interstellar hydrogen, and the abundance ratios of stellar light elements. The derived upper limits are compared with the observed flux and the demodulated flux. Nuclear gamma rays are emitted from excited nuclei which are produced by inelastic collisions between low-energy cosmic rays and the interstellar gas. Fluxes of nuclear gamma rays emitted from excited states of Li-7, C-12, N-14, and O-16 are evaluated and found to be on the order of from one hundred-millionth to one one-millionth photons per sq cm per sec.
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