Near-yrast structure of the {sup 149}La nucleus

Journal Article · Sat Sep 15 00:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.037301· OSTI ID:21064385

Urban, W; Rzaca-Urban, T ^[1]; Syntfeld-Kazuch, A ^[2]; Durell, J L; Smith, A G; Varley, B J ^[3]; Ahmad, I ^[4]

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1. Faculty of Physics, University of Warsaw, ul. Hoza 69, PL-00-681 Warsaw (Poland)
2. Soltan Institute for Nuclear Studies, PL-05-400 Swierk-Otwock (Poland)
3. Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK (United Kingdom)
4. Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Excited states in {sup 149}La, populated in the spontaneous fission of {sup 248}Cm, were studied with the EUROGAM2 array. A new {delta}I=2 band found in {sup 149}La is interpreted as the {alpha}=-1/2 branch of the {pi}3/2{sup -}[402] configuration. The bandhead has spin 7/2{sup -} because the 3/2{sup -} and 5/2{sup -} levels are pushed up by the Coriolis interaction. The 7/2{sup -} level is located not higher than 30 keV above the ground state and may form a long-lived isomer if spin and parity of the g.s. is 3/2{sup +}.

• OSTI ID: 21064385
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 76, Issue 3; Other Information: DOI: 10.1103/PhysRevC.76.037301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CURIUM 248
EXCITED STATES
GROUND STATES
ISOMERIC NUCLEI
KEV RANGE
LANTHANUM 149
NUCLEAR STRUCTURE
PARITY
SPIN
SPONTANEOUS FISSION
YRAST STATES