The 11/2{sup -}[505] neutron extruder orbital in {sup 159}Sm

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

DOI:https://doi.org/10.1103/PHYSREVC.80.037301· OSTI ID:21293885

Urban, W ^[1]; Pinston, J A; Simpson, G S ^[2]; Smith, A G; Smith, J F ^[3]; Rzaca-Urban, T ^[4]; Ahmad, I ^[5]

---

1. Institut Laue-Langevin, 6 rue J. Horowitz, F-38042 Grenoble (France)
2. LPSC, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, F-38026 Grenoble Cedex (France)
3. Department of Physics and Astronomy, University of Manchester, M13 9PL Manchester (United Kingdom)
4. Faculty of Physics, University of Warsaw, ul. Hoza 69, PL-00-681 Warsaw (Poland)
5. Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Excited states in {sup 159}Sm, populated following the spontaneous fission of {sup 252}Cf have been studied by means of {gamma} spectroscopy, using the Gammasphere array. In {sup 159}Sm we have identified an isomeric level with a half-life of T{sub 1/2}=116(8) ns at an excitation energy of 1276.8 keV and observed a rotational band on top of this isomer. On the basis of the observed properties of the isomer and the band on top of it we propose that the 1276.8-keV level in {sup 159}Sm corresponds to the 11/2{sup -}[505] neutron extruder configuration. The new excitation scheme of {sup 159}Sm is compared to quasiparticle rotor model calculations.

• OSTI ID: 21293885
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALIFORNIUM 252
CONFIGURATION
EXCITATION
EXCITED STATES
GAMMA SPECTROSCOPY
HALF-LIFE
ISOMERS
NEUTRONS
ROTATIONAL STATES
SAMARIUM 159
SPONTANEOUS FISSION