Two-quasiparticle isomers and bands of {sup 154,156}Nd and {sup 156,158,160}Sm

Journal Article · Sat Aug 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.024304· OSTI ID:21293780

Simpson, G S; Genevey, J; Pinston, J A ^[1]; Urban, W ^[2]; Orlandi, R ^[3]; Scherillo, A ^[4]; Smith, A G; Smith, J F ^[5]; Ahmad, I; Greene, J P ^[6]

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1. LPSC, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex (France)
2. Faculty of Physics, University of Warsaw, ul. Hoza 69, PL-00-681 Warszawa (Poland)
3. INFN, Laboratori Nazionali di Legnaro, Legnaro (Italy)
4. Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX (United Kingdom)
5. Department of Physics and Astronomy, University of Manchester, M13 9PL Manchester (United Kingdom)
6. Argonne National Laboratory, Argonne, Illinois 60439 (United States)

The decay of a new 3.2-{mu}s, (4{sup -}) isomeric state at 1298.0 keV has been observed using {gamma}-ray spectroscopy at the Lohengrin mass spectrometer of the Institut Laue-Langevin. By comparison with theoretical calculations this state was assigned a {nu}5/2[642] x {nu}3/2[521] dominant configuration. Prompt {gamma}-ray data from a spontaneous fission experiment have also been analyzed allowing the observation of a collective band on top of this isomeric state, the identification of a new band on top of the previously reported (5{sup -}) isomer of {sup 156}Nd and the extension of collective bands on top of (5{sup -}) isomers of the neighboring {sup 156,158}Sm nuclei. Quasiparticle rotor model calculations reported in this work correctly predict the energies and decay patterns of these bands. A new (5{sup -}) isomer in {sup 160}Sm has also been observed. The calculations predict {nu}5/2[642] x {nu}5/2[523] dominant configurations for all these (5{sup -}) isomers.

• OSTI ID: 21293780
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COMPARATIVE EVALUATIONS
CONFIGURATION
GAMMA RADIATION
GAMMA SPECTROSCOPY
ISOMERS
MASS SPECTROMETERS
NEODYMIUM 154
NEODYMIUM 156
PARTICLE-CORE COUPLING MODEL
QUASI PARTICLES
SAMARIUM 156
SAMARIUM 158
SAMARIUM 160
SIMULATION
SPONTANEOUS FISSION