Anomalies in the odd-even difference in the moments of inertia of rotational bands

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Bulletin of the American Physical Society

OSTI ID:243789

Baktash, C; Garrett, J D; Winchell, D F ^[1]

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1. Oak Ridge National Lab., TN (United States); and others

The large number of low-spin identical bands (IB) found among the adjacent odd- and even-Z rare-earth nuclei seems to run counter to the BCS pairing concept. To investigate if the standard models can correctly reproduce the odd-even difference in the moments of interia (MoI) of rotational bands, the authors have compared the experimental values with the results of pairing self-consistent Woods-Saxon cranking calculations. Using {sup 172}Yb as the reference core, these calculations correctly reproduce the identical bands based on the [402]5/2 and [404]7/2 proton orbitals in {sup 173}Lu, but not those based on the [514]9/2 orbital. Furthermore, for the [541]1/2 band, the calculations predict a change in the MoI of 28%; much larger than the experimental value of 8%. Thus, the non-identical bands pose an even more serious challenge for the conventional models than the identical bands.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 243789
• Report Number(s): CONF-9304297--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 2 Vol. 38; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BCS THEORY
CRANKING MODEL
LUTETIUM 173
MOMENT OF INERTIA
RARE EARTHS
ROTATIONAL STATES
YTTERBIUM 172