Weak coupling in the odd-mass Xe nuclides: Decay of 6.2-hCs127to levels of odd-neutron

Abstract

Gamma-ray and conversion electron singles and coincidence spectroscopy have been performed on the decay of 6.2-h '"Cs to levels of '"Xe and 30-h ' Cs to levels of '"Xe. From these data, new levels, transition multipolarities, and spin and parity assignments are derived. The systematic structure of the odd-mass Xe nuclides with 69» N & 81 is shown and the results of various calculations are discussed. Support for the use of relatively weak coupling models to describe these nuclides is enumerated.

Study of odd-mass N = 82 isotones with realistic effective interactions

“…The quasiparticle-phonon coupling (QPM) scheme is a convenient way of exploiting the rich data on low-energy excitations of doubly-even nuclei in studying To appear in Physics Reports (1995) nuclear-structure effects in odd-mass (odd-A for short) nuclei. Since it was introduced [1] it has been used extensively, in various forms [2][3][4][5][6][7][8], to discuss energy spectra of odd-A nuclei. This scheme makes use of the property of the BCS quasiparticles being the elementary excitations of an odd-A nucleus and assumes that by coupling them to the few lowest-energy (collective) excitations of the doubly-even reference nucleus one is able to describe, at least qualitatively, the spectroscopy of odd-A nuclei.…”

“…Since it was introduced [1] it has been used extensively, in various forms [2][3][4][5][6][7][8], to discuss energy spectra of odd-A nuclei. This scheme makes use of the property of the BCS quasiparticles being the elementary excitations of an odd-A nucleus and assumes that by coupling them to the few lowest-energy (collective) excitations of the doubly-even reference nucleus one is able to describe, at least qualitatively, the spectroscopy of odd-A nuclei.…”