Synthesis of Very Heavy Elements in Supermassive Stars

Details Synthesis of Very Heavy Elements in Supermassive Stars Synthesis of Very Heavy Elements in Supermassive Stars

Jan 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974pthph..51..123o&link_type=abstract

Progress of Theoretical Physics, Vol. 51, No. 1, pp. 123-133

Physics

Scientific paper

The synthetic processes of very heavy elements taking place in a supermassive star expanding from a very high temperature are investigated. Since the temperature is exceedingly high and the proton mass fraction is much larger than the mass fractions of free neutrons or heavy elements, p-process-like nuclear reactions would occur and the proton-rich heavy nuclides in the mass region 150 ≲ A ≲ 215 may be produced in this type of stars. The mass fractions in the expanding shell in the regions 100 ≲ A ≲ 150, 150≲ A ≲ 210 and 210 ≲ A ≲ 215 are, respectively, 10-15 ˜ -16ξ, 10-10 ˜ -12ξ and 10-8 ˜ -10ξ, where ξ is a parameter presumably being around unity. If the mixing mechanisms of elements have not effectively operated in the universe or in the Galaxy, we can expect the possibility for finding out the stars or stellar systems possessing the anomalously high abundances of very heavy elements in A ≳ 150.

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