Excited states and signature inversion in Cs-116
2006 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 74, no 3, 034310- p.Article in journal (Refereed) Published
Excited states have been observed for the first time in the very neutron-deficient, odd-odd nucleus, Cs-116(55)61. The assignment to Cs-116 has been made by the detection of gamma rays in coincidence with evaporated charged particles and with evaporation residues. The observed states form a rotational band which has been assigned to the nu(h(11/2)) circle times pi(h(11/2)) configuration. Tentative spin assignments have been made on the basis of systematic comparisons with neighboring cesium isotopes. A low-spin signature inversion is observed in the band at a rotational frequency of about 0.23 MeV/h. The observed signature inversions in the odd-odd Cs116-126 isotopes have been compared with the results of extended total Routhian surface calculations, in which signature inversion arises as a consequence of quadrupole-pairing correlations and triaxial deformation. As previously shown for some of the odd-odd A similar or equal to 120 isotopes, the calculations reproduce the signature inversions reasonably well.
Place, publisher, year, edition, pages
2006. Vol. 74, no 3, 034310- p.
odd-odd nuclei, high-spin states, mass region, bands, triaxiality, assignments, isotopes
IdentifiersURN: urn:nbn:se:kth:diva-16018DOI: 10.1103/PhysRevC.74.034310ISI: 000240873300015ScopusID: 2-s2.0-33748663722OAI: oai:DiVA.org:kth-16018DiVA: diva2:334060
QC 201005252010-08-052010-08-052010-08-20Bibliographically approved