6533b85bfe1ef96bd12bbf75

RESEARCH PRODUCT

The r-process in the high entropy bubble

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We examined the r-process in the high entropy bubble within a detailed parameter study. Previous investigations ([1,2]) 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.