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Contrasting behavior in the rotational structure of the T-z=1/2 nuclei Kr-73 and Rb-75: A possible fingerprint of T=0 neutron-proton pairing correlations
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
2007 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 76, no 1, 011301- p.Article in journal (Refereed) Published
Abstract [en]

Three different rotational bands have been observed to high spin in Rb-75 using Gammasphere. The structures are similar, but not identical to those found in the neighboring T-z=1/2 nucleus Kr-73. Conventional total Routhian surface (TRS) calculations with T=1 pairing are able to reproduce the rotational bands in Rb-75 with extreme accuracy, but they completely fail in reproducing the spectra and decay pattern of the negative parity bands in Kr-73. Simple qualitative arguments are put forward to show that the decay pattern observed in the negative parity bands in Kr-73 can be accounted for by means of T=0 pair correlations. To further corroborate this scenario, deformation, and pairing self-consistent TRS calculations, including schematic T=1 and T=0 pairing, are performed for the first time indicating the onset of dynamical T=0 pair-correlations at high angular momenta.

Place, publisher, year, edition, pages
2007. Vol. 76, no 1, 011301- p.
Keyword [en]
symmetry energy, wigner energy, rich nuclei, bands, isospace
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-16847DOI: 10.1103/PhysRevC.76.011301ISI: 000248542400001Scopus ID: 2-s2.0-34547337562OAI: oai:DiVA.org:kth-16847DiVA: diva2:334890
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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