Low-lying isomeric levels in {sup 75}Cu

Journal Article · Mon Mar 15 04:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.034304· OSTI ID:21386670

Daugas, J M; Faul, T; Sauvestre, J E ^[1]; Grawe, H ^[2]; Pfuetzner, M; Sawicka, M ^[3]; Grzywacz, R ^[4]; Lewitowicz, M; France, G de; Lopez Jimenez, M J; Oliveira Santos, F de ^[5]; Achouri, N L; Angelique, J C ^[6]; Baiborodin, D ^[7]; Bentida, R; Beraud, R; Emsallem, A ^[8]; Borcea, C ^[9]; Bingham, C R; Grzywacz, K L ^[4]

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1. CEA, DAM, DIF, F-91297 Arpajon cedex (France)
2. GSI-Hemholtzzentrum fuer Schwerionenforschung, Planckstrasse 1, D-64220 Darmstadt (Germany)
3. IEP, Warsaw University, 00681 Warsaw, PL-00681 Hoza 69 (Poland)
4. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States)
5. Grand Accelerateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, BP 55027, F-14076 Caen cedex 5 (France)
6. Laboratoire de Physique Corpusculaire ENSICAEN, CNRS-IN2P3 UMR 6534 et Universite de Caen, F-14050 Caen cedex (France)
7. Nuclear Physic Institute, CZ-25068 Rez (Czech Republic)
8. Institut de Physique Nucleaire de Lyon, CNRS/IN2P3, Universite Lyon 1, F-69622 Villeurbanne cedex (France)
9. Horia Hulubei National Institute of Physics and Nuclear Engineering, P.O. Box MG6, Bucharest-Margule (Romania)

Isomeric low-lying states were identified and investigated in the {sup 75}Cu nucleus. Two states at 61.8(5)- and 128.3(7)-keV excitation energies with half-lives of 370(40)- and 170(15)-ns were assigned as {sup 75m1}Cu and {sup 75m2}Cu, respectively. The measured half-lives combined with the recent spin assignment of the ground state allow one to deduce tentatively spin and parity of the two isomers and the dominant multipolarities of the isomeric transitions with respect to the systematics of the Cu isotopes. Shell-model calculations using an up-to-date effective interaction reproduce the evolution of the 1/2{sup -}, 3/2{sup -}, and 5/2{sup -} states for the neutron-rich odd-mass Cu isotopes when filling the nug{sub 9/2}. The results indicate a significant change in the nuclear structure in this region, where a single-particle 5/2{sup -} state coexists with more and more collective 3/2{sup -} and 1/2{sup -} levels at low excitation energies.

• OSTI ID: 21386670
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALLOCATIONS
ANGULAR MOMENTUM
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COPPER 75
COPPER ISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVOLUTION
EXCITATION
FERMIONS
GROUND STATES
HADRONS
HALF-LIFE
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITIONS
ISOMERS
ISOTOPES
KEV RANGE
KEV RANGE 100-1000
MASS
MATHEMATICAL MODELS
NEUTRONS
NUCLEAR MODELS
NUCLEAR STRUCTURE
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SHELL MODELS
SPIN