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Cranking in isospace - Towards a consistent mean-field description of N = Z nuclei
- Satula, W. (author)
- Wyss, Ramon A. (author)
- 2001
- 2001
- English.
- In: Acta Physica Polonica B. - 0587-4254 .- 1509-5770. ; 32:9, s. 2441-2456
- Journal article (peer-reviewed)
Abstract
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- 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).
Keyword
- proton-rich nuclei
- pairing models
- energy
- n=z
- symmetry
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- ref (subject category)
- art (subject category)
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