Interstellar Na-22 and the excess Ne-22 in the Galactic Cosmic Ray source

Details Interstellar Na-22 and the excess Ne-22 in the Galactic Cosmic Ray source Interstellar Na-22 and the excess Ne-22 in the Galactic Cosmic Ray source

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..232..193y&link_type=abstract

IN: Gamma-ray line astrophysics; Proceedings of the International Symposium, Paris, France, Dec. 10-13, 1990 (A92-43619 18-90).

Astronomy and Astrophysics

Astrophysics

1

Galactic Cosmic Rays, Neon Isotopes, Novae, Nuclear Astrophysics, Sodium 22, Abundance, Gamma Ray Spectra, Metallicity, Stellar Mass Ejection

Scientific paper

The role of novae outburst as a source of the excess Ne-22 at the Galactic Cosmic Ray source is reexamined quantitatively. Isotopes Ne-22 which are the daughter nuclei of radioactive Na-22 synthesized in novae outbursts get excess energy over thermal particles due to nuclear recoil effects by beta-decay and can preferentially be injected as cosmic ray seeds into the shock wave at nova explosion where particles are accelerated. The excess Ne-22 can be explained if a fraction of 4.5 x 10 exp -4 of the total production of Ne-22 via Na-22 in novae is accelerated. The implications of this scenario are discussed with possible observations of the 1.275 MeV gamma ray line from novae.

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