Band structure in {sup 79}Y and the question of T=0 pairing
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Joint Institute of Heavy Ion Research, Oak Ridge, Tennessee 37831 (United States)
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996 (United States)
- Institute of Theoretical Physics, Warsaw University, PL-00681 Warsaw (Poland)
- Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37831 (United States)
- Department of Physics, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
- CCLRC, Daresbury Laboratory, Warrington WA4 4AD (United Kingdom)
- Chemistry Department, Washington University, St. Louis, Missouri 63130 (United States)
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States)
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)
- Department of Physics, Louisiana State University, Baton Rouge, Louisiana 70803 (United States)
- Florida State University, Tallahassee, Florida 32306 (United States)
- The Royal Institute of Technology, Physics Department Frescati, S-104 05 Stockholm (Sweden)
Gamma rays in the N=Z+1 nucleus {sup 79}Y were identified using the reaction {sup 28}Si({sup 54}Fe,thinspp2n){sup 79}Y at a 200 MeV beam energy and an experimental setup consisting of an array of Ge detectors and the Recoil Mass Spectrometer at Oak Ridge National Laboratory. With the help of additional {gamma}-{gamma} coincidence data obtained with Gammasphere, these {gamma} rays were found to form a strongly coupled rotational band with rigid-rotor-like behavior. Results of conventional Nilsson-Strutinsky cranked shell model calculations, which predict a deformation of {beta}{sub 2}{approximately}0.4, are in excellent agreement with the properties of this band. Similar calculations for the neighboring N=Z and N=Z+1 nuclei are also in good agreement with experimental data. This suggests that the presence of the putative T=0 neutron-proton pairing does not significantly affect such simple observables as the moments of inertia of these bands at low spins. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 670261
- Journal Information:
- Physical Review, C, Vol. 58, Issue 6; Other Information: PBD: Dec 1998
- Country of Publication:
- United States
- Language:
- English
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