Contribution of 20.58 MeV gamma-line in E>20 MeV solar flare gamma emission, and He-3 concentration in the deep layers of the solar atmosphere.

Details Contribution of 20.58 MeV gamma-line in E>20 MeV solar flare gamma emission, and He-3 concentration in the deep layers of the solar atmosphere. Contribution of 20.58 MeV gamma-line in E>20 MeV solar flare gamma emission, and He-3 concentration in the deep layers of the solar atmosphere.

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....8.3048k&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

Scientific paper

We analyse using Monte-Carlo modelling 20.58 MeV gamma-line fluxes arising from solar flare neutron radiative captures by He-3 nuclei in the solar atmosphere. The dependencies of fluxes on initial solar flare neutron energy spectra and He-3 content in photospheric and subphotospheric layers are studied. The cross sections of this reaction are very small, but some astrophysical ideas lead to the known supposition about high He-3 content in the deep layers. It can lead to measurable 20.58 MeV gamma-ray fluxes in future experiments. In principle it is possible to separate this gamma-emission from pi-zero-meson decay wide gammacontinuum. Indeed, 20.58 MeV gammaemission must be delayed because of the largest efficiency at thermal neutrons, when pi-zero-meson gamma-emission is "instantaneous". If the separation of the two tipes of gamma-emission will be possible in the future experiments, then some conclusions about He-3 content in the deep layers may be done.

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