Coherent quadrupole-octupole modes and split parity-doublet spectra in odd-A nuclei

Journal Article · Sat Sep 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.034324· OSTI ID:21064352

Minkov, N; Drenska, S; Yotov, P; Lalkovski, S; Bonatsos, D; Scheid, W ^[1]

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1. Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Tzarigrad Road 72, BG-1784 Sofia (Bulgaria)

A collective model describing coherent quadrupole-octupole oscillations and rotations with a Coriolis coupling between the even-even core and the unpaired nucleon is applied to odd nuclei. The particle-core coupling provides a parity-doublet structure of the spectrum, whereas the quadrupole-octupole motion leads to a splitting of the doublet energy levels. The formalism successfully reproduces the split parity-doublet spectra and the attendant B(E1) and B(E2) transition probabilities in a wide range of odd-A nuclei. It provides estimations for the influence of the Coriolis interaction on the collective motion and subsequently for the value of angular momentum projection K on which the spectrum is built. The analysis of the energy splitting and B(E1) transition probabilities between opposite parity counterparts suggests degenerate doublet structures at high angular momenta. The study provides information about the evolution of quadrupole-octupole collectivity in odd-mass nuclei.

• OSTI ID: 21064352
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 76; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
COLLECTIVE MODEL
COUPLING
E1-TRANSITIONS
E2-TRANSITIONS
ENERGY LEVELS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
NUCLEAR STRUCTURE
NUCLEONS
OCTUPOLES
ODD-EVEN NUCLEI
PARITY
PROBABILITY
QUADRUPOLES
ROTATION