Nuclear Spins and Moments of Ga Isotopes Reveal Sudden Structural Changes between N=40 and N=50

Journal Article · Fri Jun 25 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.252502· OSTI ID:21410436

Cheal, B; Mane, E; Billowes, J; Charlwood, F C ^[1]; Bissell, M L; Neyens, G; Vingerhoets, P ^[2]; Blaum, K; Schug, M; Yordanov, D T ^[3]; Brown, B A ^[4]; Flanagan, K T ^[5]; Forest, D H ^[6]; Geppert, C; Noertershaeuser, W ^[7]; Honma, M ^[8]; Jokinen, A; Moore, I D ^[9]; Kowalska, M ^[10]; Krieger, A ^[11]

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1. School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL (United Kingdom)
2. Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven (Belgium)
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. I.P.N. Orsay, F-91940 Orsay Cedex (France)
6. School of Physics and Astronomy, The University of Birmingham, Birmingham, B15 2TT (United Kingdom)
7. GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, D-64291 Darmstadt (Germany)
8. Center for Mathematical Sciences, University of Aizu, Tsuruga, Ikki-machi, Aizu-Wakamatsu, Fukushima 965-8580 (Japan)
9. Department of Physics, University of Jyvaeskylae, FIN-40014 Jyvaeskylae (Finland)
10. Physics Department, CERN, CH-1211 Geneva 23 (Switzerland)
11. Institut fuer Kernchemie, Universitaet Mainz, D-55128 Mainz (Germany)

Collinear laser spectroscopy was performed on Ga (Z=31) isotopes at ISOLDE, CERN. A gas-filled linear Paul trap (ISCOOL) was used to extend measurements towards very neutron-rich isotopes (N=36-50). A ground state (g.s.) spin I=1/2 is measured for {sup 73}Ga, being near degenerate with a 3/2{sup -} isomer (75 eV < or approx. E{sub ex} < or approx. 1 keV). The {sup 79}Ga g.s., with I=3/2, is dominated by protons in the {pi}f{sub 5/2} orbital and in {sup 81}Ga the 5/2{sup -} level becomes the g.s. The data are compared to shell-model calculations in the f{sub 5/2}pg{sub 9/2} model space, calling for further theoretical developments and new experiments.

• OSTI ID: 21410436
• Journal Information: Physical Review Letters, Vol. 104, Issue 25; Other Information: DOI: 10.1103/PhysRevLett.104.252502; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
CERN
EV RANGE
GALLIUM 73
GALLIUM 79
GALLIUM 81
GROUND STATES
ISOMERS
KEV RANGE
LASER SPECTROSCOPY
NEUTRON-RICH ISOTOPES
PROTONS
SHELL MODELS
SPIN
ANGULAR MOMENTUM
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
FERMIONS
GALLIUM ISOTOPES
HADRONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNATIONAL ORGANIZATIONS
ISOTOPES
MATHEMATICAL MODELS
NUCLEAR MODELS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTROSCOPY