Dominant (g{sub 9/2}){sup 2} neutron configuration in the 4{sub 1}{sup +} state of {sup 68}Zn based on new g factor measurements

Journal Article · Sat Oct 01 04:00:00 EDT 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.044301· OSTI ID:20699047

Leske, J; Speidel, K -H; Schielke, S ^[1]; Gerber, J ^[2]; Maier-Komor, P ^[3]; Engeland, T; Hjorth-Jensen, M ^[4]

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1. Helmholtz-Institut fuer Strahlen und Kernphysik, Universitaet Bonn, Nussallee 14-16, D-53115 Bonn (Germany)
2. Institut de Recherches Subatomiques, F-67037 Strasbourg (France)
3. Physik-Department, Technische Universitaet Muenchen, James-Franck-Strasse, D-85748 Garching (Germany)
4. Department of Physics and Center of Mathematics for Applications, University of Oslo, N-0316 Oslo (Norway)

The g factor of the 4{sub 1}{sup +} state in {sup 68}Zn was remeasured with improved energy resolution of the detectors used. The value obtained is consistent with the previous result of a negative g factor, thus confirming the dominant 0g{sub 9/2} neutron nature of the 4{sub 1}{sup +} state. In addition, the accuracy of the g factors of the 2{sub 1}{sup +},2{sub 2}{sup +}, and 3{sub 1}{sup -} states has been improved and their lifetimes were well reproduced. New large-scale shell-model calculations based on a {sup 56}Ni core and a 0f{sub 5/2}1p0g{sub 9/2} model space yield a theoretical value, g(4{sub 1}{sup +})=+0.008. Although the calculated value is small, it cannot fully explain the experimental value, g(4{sub 1}{sup +})=-0.37(17). The magnitude of the deduced B(E2) of the 4{sub 1}{sup +} and 2{sub 1}{sup +} transitions is, however, rather well described. These results demonstrate again the importance of g factor measurements for nuclear structure determinations because of their specific sensitivity to detailed proton and neutron components in the nuclear wave functions.

• OSTI ID: 20699047
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 72; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ENERGY LEVELS
ENERGY RESOLUTION
ENERGY-LEVEL TRANSITIONS
LANDE FACTOR
LIFETIME
NEUTRONS
NICKEL 56
NUCLEAR MAGNETIC MOMENTS
NUCLEAR STRUCTURE
PROBABILITY
PROTONS
SHELL MODELS
WAVE FUNCTIONS
ZINC 68