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Phys. Rev. C 75, 051301(R) (2007) [4 pages]

Pair correlations in nuclei involved in neutrinoless double β decay: 76Ge and 76Se

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S. J. Freeman1, J. P. Schiffer2,*, A. C. C. Villari3, J. A. Clark4, C. Deibel4, S. Gros2, A. Heinz4, D. Hirata3,5, C. L. Jiang2, B. P. Kay1, A. Parikh4, P. D. Parker4, J. Qian4, K. E. Rehm2, X. D. Tang2, V. Werner4, and C. Wrede4
1Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
2Argonne National Laboratory, Argonne, Illinois 60439, USA
3GANIL (IN2P3/CNRS-DSM/CEA), B. P. 55027 F-14076 Caen Cedex 5, France
4A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USA
5The Open University, Dept. of Physics and Astronomy, Milton Keynes, MK7 6AA, United Kingdom

Received 22 December 2006; revised 15 February 2007; published 3 May 2007

Precision measurements were carried out to test the similarities between the ground states of 76Ge and 76Se. The extent to which these two nuclei can be characterized as consisting of correlated pairs of neutrons in a BCS-like ground state was studied. The pair removal (p,t) reaction was measured at the far forward angle of 3°. The relative cross sections are consistent (at the 5% level) with the description of these nuclei in terms of a correlated pairing state outside the N=28 closed shells with no pairing vibrations. Data were also obtained for 74Ge and 78Se.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.75.051301
DOI:
10.1103/PhysRevC.75.051301
PACS:
25.40.Hs, 23.40.Hc, 27.50.+e

*Electronic address: schiffer@anl.gov

 
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