Candidates for low-lying mixed-symmetry states in Nd140

E. Williams, R. J. Casperson, V. Werner, H. Ai, P. Boutachkov, M. Chamberlain, G. Gürdal, A. Heinz, E. A. McCutchan, J. Qian, and R. Winkler
Phys. Rev. C 80, 054309 – Published 17 November 2009

Abstract

The nucleus Nd140 was investigated using γ-γ coincidence and angular-correlation techniques following the ε/β+ decay of Sm140 and Pr140. Spins, γ-decay intensities, and E2/M1 mixing ratios were extracted from the data. The 23+ and 24+ states were identified as possible mixed-symmetry states, based on mixing ratios obtained for observed decays to the 21+ state. The relationship between the decay pattern of these two candidate states and underlying shell structure in this mass region is discussed.

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  • Received 28 September 2009

DOI:https://doi.org/10.1103/PhysRevC.80.054309

©2009 American Physical Society

Authors & Affiliations

E. Williams1,*, R. J. Casperson1, V. Werner1, H. Ai1, P. Boutachkov2, M. Chamberlain1,3, G. Gürdal1,4, A. Heinz1, E. A. McCutchan1, J. Qian1, and R. Winkler1

  • 1Wright Nuclear Structure Laboratory, Yale University, 272 Whitney Avenue, New Haven, Connecticut 06520-8124, USA
  • 2Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903, USA
  • 3Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
  • 4Clark University, Worcester, Massachusetts 01610, USA

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Vol. 80, Iss. 5 — November 2009

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