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Phys. Rev. C 67, 054315 (2003) [5 pages]

B(E2) values and the search for the critical point symmetry X(5) in 104Mo and 106Mo

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C. Hutter1,2, R. Krücken1,3, A. Aprahamian4, C. J. Barton1, C. W. Beausang1, M. A. Caprio1, R. F. Casten1, W.-T. Chou1,5, R. M. Clark6, D. Cline7, J. R. Cooper1,8, M. Cromaz6, A. A. Hecht1, A. O. Macchiavelli6, N. Pietralla1,9, M. Shawcross4, M. A. Stoyer8, C. Y. Wu7, and N. V. Zamfir1,10,11
1A.W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520
2Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
3Physik Department E12, Technische Universität München, 85748 Garching, Germany
4Nuclear Structure Laboratory, University of Notre Dame, Notre Dame, Indiana 46556
5National Tsing Hua University, Hsinchu, Taiwan, Republic of China
6Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720
7Nuclear Structure Research Laboratory, University of Rochester, Rochester, New York 14627
8Lawrence Livermore National Laboratory, Livermore, California 94551
9Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany
10Clark University, Worcester, Massachusetts 01610
11National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania

Received 11 February 2003; published 28 May 2003

Lifetimes of the first 4+ and 6+ states in 104Mo and 106Mo have been measured using the recoil distance method following spontaneous fission of 252Cf. The experiment was performed at the 88-inch cyclotron of the Lawrence Berkeley National Laboratory employing the Gammasphere array and the New Yale Plunger Device. Reduced transition probabilities in the ground state band of 104Mo are compared with predictions of the critical point symmetry X(5) for phase transitional nuclei between rotational and vibrational shape. While known level energies of 104Mo are in good agreement with the X(5) predictions, the analysis of the measured B(E2) values favors a rotor interpretation.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.67.054315
DOI:
10.1103/PhysRevC.67.054315
PACS:
21.10.-k, 21.60.-n, 27.60.+j, 23.20.-g
 
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