Ground-state spins and moments of ${}^{72,74,76,78}$Ga nuclei

Ground-state spins and moments of $^{72, 74, 76, 78}$ Ga nuclei

E. Mané, B. Cheal, J. Billowes, M. L. Bissell, K. Blaum, F. C. Charlwood, K. T. Flanagan, D. H. Forest, Ch. Geppert, M. Kowalska, A. Krieger, J. Krämer, I. D. Moore, R. Neugart, G. Neyens, W. Nörtershäuser, M. M. Rajabali, R. Sánchez, M. Schug, H. H. Stroke, P. Vingerhoets, D. T. Yordanov, and M. Žáková

Phys. Rev. C 84, 024303 – Published 8 August 2011

Abstract

Laser spectroscopy was performed on the $^{72, 74, 76, 78}$ Ga isotopes at On-Line Isotope Mass Separator (ISOLDE) facility, CERN. Ground-state nuclear spins and moments were extracted from the measured hyperfine spectra. The results are compared to shell-model calculations, which provide a detailed probe of the nuclear wave function. The spin is established from the shape of the hyperfine structure and the parity inferred from a comparison of shell-model calculations with the measured nuclear moments. The ground states of $^{76, 78}$ Ga are both assigned a spin and parity of $I^{π} = 2^{-}$ , while $^{74}$ Ga is tentatively assigned as $I^{π} = 3^{-}$ . For $^{72}$ Ga, the results are consistent with the previous $I = 3$ assignment.

Received 23 June 2011

DOI:https://doi.org/10.1103/PhysRevC.84.024303

Authors & Affiliations

E. Mané¹, B. Cheal^1,*, J. Billowes¹, M. L. Bissell², K. Blaum³, F. C. Charlwood¹, K. T. Flanagan⁴, D. H. Forest⁵, Ch. Geppert^6,7, M. Kowalska^8,3, A. Krieger⁷, J. Krämer⁷, I. D. Moore^9,10, R. Neugart⁷, G. Neyens², W. Nörtershäuser^6,7, M. M. Rajabali², R. Sánchez⁶, M. Schug³, H. H. Stroke¹¹, P. Vingerhoets², D. T. Yordanov³, and M. Žáková⁷

¹School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK
²Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
³Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany
⁴CNRS, CSNSM, IN2P3, F-91405 Orsay, France
⁵School of Physics and Astronomy, The University of Birmingham, Birmingham B15 2TT, UK
⁶GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
⁷Institut für Kernchemie, Johannes Gutenberg–Universität Mainz, D-55128 Mainz, Germany
⁸Physics Department, CERN, CH-1211 Geneva 23, Switzerland
⁹Department of Physics, University of Jyväskylä, FIN-40014 Jyväskylä, Finland
¹⁰Helsinki Institute of Physics, University of Helsinki, FIN-00014 Helsinki, Finland
¹¹Department of Physics, New York University, New York, New York 10003, USA

^*bradley.cheal@manchester.ac.uk

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Vol. 84, Iss. 2 — August 2011

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