Continuing influence of shell effects at high-excitation energies

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dc.contributor.authorNgwetsheni, Cebo
dc.contributor.authorOrce, José Nicolás
dc.date.accessioned2023-03-02T11:15:38Z
dc.date.available2023-03-02T11:15:38Z
dc.date.issued2019
dc.description.abstractEmpirical drops in ground-state nuclear polarizabilities indicate deviations from the effect of giant dipole resonances and may reveal the presence of shell effects in semi-magic nuclei with neutron magic numbers N = 50, 82 and 126. Similar drops of polarizability in the quasi-continuum of nuclei with, or close to, magic numbers N = 28, 50 and 82, could reflect the continuing influence of shell closures up to the nucleon separation energy. These findings open a new avenue to investigating magic numbers at high-excitation energies and strongly support recent large-scale shell-model calculations in the quasi- continuum region, which describe the origin of the low-energy enhancement of the photon strength function as induced paramagnetism. The nuclear-structure dependence of the photon-strength function asserts the generalized Brink-Axel hypothesis as more universal than originally expected.en_US
dc.identifier.citationNgwetsheni, C., & Orce, J. N. (2019). Continuing influence of shell effects at high-excitation energies. Physics Letters B, 792 , 335-339. https://doi.org/10.1016/j.physletb.2019.03.021en_US
dc.identifier.issn1873-2445
dc.identifier.urihttps://doi.org/10.1016/j.physletb.2019.03.021
dc.identifier.urihttp://hdl.handle.net/10566/8495
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectEnergyen_US
dc.subjectAstronomyen_US
dc.subjectPhysicsen_US
dc.subjectCosmologyen_US
dc.subjectNuclearen_US
dc.titleContinuing influence of shell effects at high-excitation energiesen_US
dc.typeArticleen_US

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