The Li/Li-6 ratio and the stellar yield of Li-7

Details The Li/Li-6 ratio and the stellar yield of Li-7 The Li/Li-6 ratio and the stellar yield of Li-7

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...269..166r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 269, no. 1-2, p. 166-168.

Astronomy and Astrophysics

Astrophysics

15

Cosmic Gases, Galactic Cosmic Rays, Lithium Isotopes, Stellar Composition, Galactic Evolution, Interstellar Matter, Metallicity

Scientific paper

The detection of the lithium isotopic ratio in the present Galactic gas by Lemoine et al. (1992) can be related to the flux of Galactic cosmic rays, to give information on the stellar source of Li-7. We obtain the following average yield for the last 4.5 Gyr in the solar neighborhood: 20 solar masses of Li-7 per gigayear per 10 exp 10 solar masses of gas, corresponding to an addition of Delta (Li-7/H) quite comparable to the difference between the Population I and Population II abundances. This observation is of relevance for the estimation of the big-bang yield of lithium, alleviating the need of primordial values as high as Population I stars.

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