Abstract
We analyze the sensitivity of -decay rates in and to a correction term in Skyrme energy-density functionals (EDFs) which modifies the radial shape of the nucleon effective mass. This correction is added on top of several Skyrme parametrizations which are selected from their effective mass properties and predictions about the stability properties of . The impact of the correction on high-energy collective modes is shown to be moderate. From the comparison of the effects induced by the surface-peaked effective mass in the three doubly magic nuclei, it is found that is largely impacted by the correction, while and are only moderately affected. We conclude that -decay rates in these nuclei can be used as a test of different parts of the nuclear EDF: and are mostly sensitive to the particle-hole interaction through the values, while is sensitive to the radial shape of the effective mass. Possible improvements of these different parts could therefore be better constrained in the future.
- Received 5 November 2014
- Revised 4 February 2015
DOI:https://doi.org/10.1103/PhysRevC.91.034322
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