Na-22 decay gamma rays from classical novae

Details Na-22 decay gamma rays from classical novae Na-22 decay gamma rays from classical novae

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9516383t&link_type=abstract

Final Report, 15 May 1991 - 14 May 1993 Chicago Univ., Chicago, IL. Dept. of Astronomy and Astrophysics.

Astronomy and Astrophysics

Astrophysics

Critical Frequencies, Emission Spectra, Gamma Ray Astronomy, Gamma Rays, Luminosity, Novae, Nuclear Astrophysics, Positrons, Sodium 22, Aluminum Isotopes, Beryllium Isotopes, Fluorine Isotopes, X Ray Sources

Scientific paper

NASA Grant NAG 5-1565 has provided support for a program of theoretical research in nuclear astrophysics and related areas, focusing upon the possibility of detecting gamma rays from nearby novae. Particular attention has been given to the evaluation of the theoretical expectations for gamma ray emission from four possible sources: (1) the positron decays of the unstable CNO and fluorine isotopes that are transported to the surface regions of the envelope in the earliest stages of the outbursts; (2) Be-7 decay gamma rays, (3) Na-22 decay gamma rays released in the later stages of the outbursts; and (4) Al-26 decay gamma rays from novae and their possible contribution to Galactic emission. The critical questions of (1) the frequency of occurrence of ONeMg-enriched novae; (2) the expected Galactic distribution of the novae that produce 26Al; and (3) the nature of the observed soft X-ray emission from classical novae, have also been addressed. Considerable progress in research has been achieved on many of these fronts. Brief summaries of the results of several research projects are presented.

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