Reflection asymmetric states in 146Nd

High-spin states in 146Nd up to an excitation energy of 7.4 MeV were studied via the 136 Xe( 13C ,3nγ) reaction. A quasi-rotational band consisting of alternating parity levels connected by fast E1 transitions is found, indicating strong octupole correlations in this nucleus. We find its vibrational...

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Bibliographic Details
Published in:Nuclear physics. A 1996, Vol.596 (1), p.155-170
Main Authors: Iacob, V.E, Urban, W, Bacelar, J.C, Jongman, J, Nyberg, J, Sletten, G, Trache, L
Format: Article
Language:English
Subjects:
nordball
Nuclear structure
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Summary:High-spin states in 146Nd up to an excitation energy of 7.4 MeV were studied via the 136 Xe( 13C ,3nγ) reaction. A quasi-rotational band consisting of alternating parity levels connected by fast E1 transitions is found, indicating strong octupole correlations in this nucleus. We find its vibrational character at low spins evolves towards a permanent octupole deformation at medium spins where a simplex quantum number s = +1 can be assigned to the ground-state band. Another quasi-rotational structure of states of unnatural parity, in the spin range 10 to 16 is tentatively identified to have simplex quantum number s = −1. Measured B( E1) B( E2) ratios show the largest intrinsic dipole moment in this mass region in good agreement with theoretical predictions.
ISSN:0375-9474
DOI:10.1016/0375-9474(95)00383-5