The r-Process in the High Entropy Bubble

Details The r-Process in the High Entropy Bubble The r-Process in the High Entropy Bubble

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997nupha.621..405f&link_type=abstract

Nuclear Physics A, v. 621, p. 405-408.

Physics

Nuclear Physics

8

Scientific paper

We examined the r-process in the high entropy bubble within a detailed parameter study. Previous investigations based on realistic supernovae models showed already that this model yields a very good fit to the solar system r-process abundance curve for masses above A = 120. For A < 120 their fit was relatively poor. We are concerned mainly with the question whether it is possible to obtain a good fit in the range below A = 120. Within a simple approach of an adiabatically expanding sphere we analyzed a broad parameter range, independent of specific explosion simulations. We varyied the electron abundance Ye and the entropy S and studied the resulting contributions as a function of the two parameters. We could show that the reproduction of the whole r-process pattern within the suggested high-entropy bubble scenario is not possible unless electron abundances as low as 0.35 are permitted.

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