Decay of the Iπ=8− isomeric state in Nd134 and

Abstract

The properties of the K-isomer decays in the 134 Nd and 184 Pt nuclei have been investigated. Measurements were carried out in e-γ and γ-γ coincidence modes using electron spectrometers coupled to the central European Array for Gamma Levels Evaluations at the Heavy Ion Laboratory of the University of Warsaw. Internal conversion coefficients were obtained for transitions relevant to the decay of the isomeric states, allowing the determination of multipolarities and mixing ratios as well as hindrance factors. Two possible causes of the weakening of the K forbiddenness, namely rotational K mixing (Coriolis interaction) and triaxiality, are briefly discussed using schematic theoretical models.

Identification of high- K rotation in Ba130 : Testing the consistency of electromagnetic observables

“…The K π = 8 − isomers of the other N = 74 nuclei have been studied by Orce et al [10] for 128 Xe, Paul et al [11] and Perkovski et al [12] for 132 Ce, Petrache et al [13] and Perkovski et al [14] for 134 Nd, Regan et al [15] for 136 Sm, Bruce et al [16] and Cullen et al [17] for 138 Gd, and Królas et al [18] and Cullen et al [19] for 140 Dy. The systematics and theoretical interpretation of the 8 − isomers in the N = 74 isotones was recently presented in Refs.…”