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Cranking in isospace - Towards a consistent mean-field description of N = Z nuclei
2001 (English)In: Acta Physica Polonica B, ISSN 0587-4254, E-ISSN 1509-5770, Vol. 32, no 9, 2441-2456 p.Article in journal (Refereed) Published
Abstract [en]

Excitation spectra DeltaE(T) of T = 0, 1, 2 states in even-even (e-e) and odd-odd (o-o) N = Z nuclei are analyzed within a mean-field based model involving isovector and isoscalar pairing interactions and the iso-cranking formalism applied to restore approximately isospin symmetry. It is shown that T = 0 states in o-o and T = 1 states in e-e nuclei correspond to two-quasiparticle, time-reversal symmetry breaking excitations since their angular momenta are I not equal 0. On the other hand the lowest T = 2 states in e-e and T = 1 states in o-o nuclei, which both are similar in structure to their even-even isobaric analogue states, are described as e-e type vacua excited (iso-cranked) in isospace. It appears that in all cases isoscalar pairing plays a crucial role in restoring the proper value of the inertia parameter in isospace i.e. DeltaE(T).

Place, publisher, year, edition, pages
2001. Vol. 32, no 9, 2441-2456 p.
Keyword [en]
proton-rich nuclei, pairing models, energy, n=z, symmetry
Identifiers
URN: urn:nbn:se:kth:diva-21016ISI: 000171568000019OAI: oai:DiVA.org:kth-21016DiVA: diva2:339713
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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