Nuclear Spins and Moments of Ga Isotopes Reveal Sudden Structural Changes between N=40 and N=50
- Cheal, B.
- Mané, E.
- Billowes, J.
- L. Bissell, M.
- Blaum, K.
- A. Brown, B.
- C. Charlwood, F.
- Flanagan, K.T.
- H. Forest, D.
- Geppert, C.
- Honma, M.
- Jokinen, A.
- Kowalska, M.
- Krieger, A.
- Krämer, J.
- D. Moore, I.
- Neugart, R.
- Neyens, G.
- Nörtershäuser, W.
- Schug, M.
- H. Stroke, H.
- Vingerhoets, P.
- T. Yordanov, D.
- Žáková, M.
Publication date
January 2010
DOI Publisher
American Physical Society (APS)Abstract
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 73Ga, being near degenerate with a 3/2- isomer (75 eV≲Eex≲1 keV). The 79Ga g.s., with I=3/2, is dominated by protons in the πf5/2 orbital and in 81Ga the 5/2- level becomes the g.s. The data are compared to shell-model calculations in the f5/2pg9/2 model space, calling for further theoretical developments and new experiments
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