Projects per year
Abstract
We analyze the role of isoscalar, isovector, neutron-proton, neutron-neutron, and proton-proton multipole interaction energies in inducing the onset of reflection-asymmetric ground-state deformations.
The calculations are performed in the framework of axial reflection-asymmetric Hartree-Fock-Bogoliubov theory using two Skyrme energy density functionals and density-dependent pairing force.
We show that reflection-asymmetric ground-state shapes of atomic nuclei are driven by the odd-multipolarity neutron-proton (or isoscalar) part of the nuclear interaction energy. This result is consistent with the particle-vibration picture, in which the main driver of octupole instability is the isoscalar octupole-octupole interaction giving rise to large E3 polarizability.
The necessary condition for the appearance of localized regions of pear-shaped nuclei in the nuclear landscape is the presence
of parity doublets involving Delta_ell=Delta_j=3 proton or neutron single-particle shells. This condition alone is, however, not sufficient to determine whether pear shapes actually appear, and -- if so -- what the corresponding reflection-asymmetric deformation energies are.
The predicted small reflection-asymmetric deformation energies result from dramatic
cancellations between even- and odd-multipolarity components of the nuclear binding energy.
Original language | English |
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Article number | 034303 |
Journal | Physical Review C - Nuclear Physics |
Volume | 103 |
Issue number | 3 |
Publication status | Published - 3 Mar 2021 |
Projects
- 2 Finished
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Nuclear Physics Consolidated Grant
Jenkins, D. (Principal investigator), Andreyev, A. (Co-investigator), Bentley, M. (Co-investigator), Diget, C. A. (Co-investigator), Dobaczewski, J. J. (Co-investigator), Fulton, B. R. (Co-investigator), Laird, A. M. (Co-investigator), Paschalis, S. (Co-investigator), Pastore, A. (Co-investigator), Petri, M. (Co-investigator) & Wadsworth, R. (Co-investigator)
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC)
1/10/17 → 30/09/22
Project: Research project (funded) › Research
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Nuclear Physics Theory
Dobaczewski, J. J. (Principal investigator) & Pastore, A. (Principal investigator)
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC)
1/06/15 → 31/03/20
Project: Research project (funded) › Research