Systematic search of πh11/2⊗vh11/2 chiral doublet bands and role of triaxiality in odd-odd Z = 55 isotopes: 128,130,132,134Cs

Takeshi Koike, K. Starosta, C. J. Chiara, D. B. Fossan, D. R. LaFosse

Research output: Contribution to journalArticlepeer-review

136 Citations (Scopus)

Abstract

The odd-odd Cs isotopes 128-134Cs have been investigated in search of chiral doublet bands. Two nearly degenerate bands built on the πh11/2⊗vh11/2 configuration have been identified in 128-132Cs. Systematics of various experimental observables associated with the partner bands are presented. The B(M1)In/B(M1)Out staggering with spin was discovered to be in phase with the B(M1)/B(E2) staggering for the yrast panner band. A core-quasiparticle coupling model employing the Kerman-Klein-Dönau-Frauendorf method was applied to study 128Cs. A triaxial core with an irrotational-flow moment of inertia was assumed. The chiral features, as well as previously known experimental characteristics of the πh11/2⊗vh11/2 yrast partner band, are well reproduced demonstrating the important role played by triaxiality in the underlying physics in these nuclei.

Original languageEnglish
Pages (from-to)443191-4431922
Number of pages3988732
JournalPhysical Review C - Nuclear Physics
Volume67
Issue number4
Publication statusPublished - 2003 Apr 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

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