Nuclear spins, magnetic moments, and quadrupole moments of Cu isotopes from N=28 to N=46: Probes for core polarization effects

Journal Article · Wed Dec 15 00:00:00 EST 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.064311· OSTI ID:21499263

Vingerhoets, P; Avgoulea, M; Bissell, M L; De Rydt, M; Neyens, G ^[1]; Flanagan, K T ^[1]; Billowes, J; Cheal, B; Mane, E ^[2]; Blaum, K; Schug, M ^[3]; Brown, B A ^[4]; Forest, D H; Tungate, G ^[5]; Geppert, Ch; Noertershaeuser, W ^[6]; Honma, M ^[7]; Kowalska, M ^[8]; Kraemer, J; Krieger, A ^[9]

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1. Instituut voor Kern- en Stralingsfysica, K.U. Leuven, B-3001 Leuven (Belgium)
2. School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL (United Kingdom)
3. Max-Planck-Institut fuer Kernphysik, D-69117 Heidelberg (Germany)
4. National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-1321 (United States)
5. School of Physics and Astronomy, The University of Birmingham, Birmingham B15 2TT (United Kingdom)
6. GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, D-64291 Darmstadt (Germany)
7. Center for Mathematical Sciences, University of Aizu, Tsuruga, Ikki-machi, Aizu-Wakamatsu, Fukushima 965-8580 (Japan)
8. Physics Department, CERN, CH-1211 Geneva 23 (Switzerland)
9. Institut fuer Kernchemie, Johannes Gutenberg-Universitaet Mainz, D-55128 Mainz (Germany)

Measurements of the ground-state nuclear spins and magnetic and quadrupole moments of the copper isotopes from {sup 61}Cu up to {sup 75}Cu are reported. The experiments were performed at the CERN online isotope mass separator (ISOLDE) facility, using the technique of collinear laser spectroscopy. The trend in the magnetic moments between the N=28 and N=50 shell closures is reasonably reproduced by large-scale shell-model calculations starting from a {sup 56}Ni core. The quadrupole moments reveal a strong polarization of the underlying Ni core when the neutron shell is opened, which is, however, strongly reduced at N=40 due to the parity change between the pf and g orbits. No enhanced core polarization is seen beyond N=40. Deviations between measured and calculated moments are attributed to the softness of the {sup 56}Ni core and weakening of the Z=28 and N=28 shell gaps.

• OSTI ID: 21499263
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 6; Other Information: DOI: 10.1103/PhysRevC.82.064311; (c) 2010 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CERN
COPPER ISOTOPES
GROUND STATES
LASER SPECTROSCOPY
MAGNETIC MOMENTS
MASS
NEUTRONS
NICKEL 56
ORBITS
PARITY
POLARIZATION
QUADRUPOLE MOMENTS
SHELL MODELS
SPIN
ANGULAR MOMENTUM
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
INTERNATIONAL ORGANIZATIONS
ISOTOPES
MATHEMATICAL MODELS
NICKEL ISOTOPES
NUCLEAR MODELS
NUCLEI
NUCLEONS
PARTICLE PROPERTIES
RADIOISOTOPES
SPECTROSCOPY