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Effect of exact Coulomb-exchange calculations on band-head spectra of odd-proton nuclei

Koh, Meng Hock and Mohamad, Nor Nurhafiza (2017) Effect of exact Coulomb-exchange calculations on band-head spectra of odd-proton nuclei. In: Regional Conference on Nuclear Physics, RCNP 2016, 15 - 16 December 2016, Johor.


Official URL: http://dx.doi.org/10.1051/epjconf/201715600004


Previous calculations of band-head energy spectra of odd-mass heavy nuclei in the Hartree-Fock-plus-Bardeen-Cooper-Schrieffer (HF-BCS) framework showed that the agreement with data is better for odd-neutron as compared to odd-proton nuclei. The reason for a poorer agreement with data for the latter have been ascribed to the possible usage of the Slater approximation in calculating the Coulomb-exchange term. In this work, we report the effect of exact Coulomb-exchange calculations on band-head energy spectra of two odd-proton nuclei (namely 237Np and 241Am) as compared to the results obtained using the Slater approximation. We performed self-consistent blocking calculations while taking the breaking of time-reversal symmetry at the mean-field level into account due to the unpaired nucleon. The SkM∗ and SIII parametrizations of the Skyrme interaction have been employed to approximate the effective nucleon-nucleon interaction while a seniority force is used for the pairing channel. Contrary to what was expected, our preliminary results show no improvement on the band-head spectra as compared to data when the Coulomb-exchange term is calculated exactly.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Coulomb-exchange term, unpaired nucleon
Subjects:Q Science > QC Physics
ID Code:97348
Deposited By: Narimah Nawil
Deposited On:28 Sep 2022 16:38
Last Modified:28 Sep 2022 16:38

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