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Phys. Rev. Lett. 91, 132501 (2003) [4 pages]

A Composite Chiral Pair of Rotational Bands in the Odd-A Nucleus 135Nd

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S. Zhu1, U. Garg1, B. K. Nayak1, S. S. Ghugre2, N. S. Pattabiraman2, D. B. Fossan3, T. Koike3, K. Starosta3, C. Vaman3, R. V. F. Janssens4, R. S. Chakrawarthy5, M. Whitehead5, A. O. Macchiavelli6, and S. Frauendorf1
1Physics Department, University of Notre Dame, Notre Dame, Indiana 46556, USA
2IUCDAEF-Calcutta Center, Calcutta 700 094, India
3Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794, USA
4Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
5Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom
6Nuclear Physics Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

Received 20 February 2003; revised 14 May 2003; published 25 September 2003

High-spin states in 135Nd were populated with the 110Pd(30Si,5n)135Nd reaction at a 30Si bombarding energy of 133 MeV. Two ΔI=1 bands with close excitation energies and the same parity were observed. These bands are directly linked by ΔI=1 and ΔI=2 transitions. The chiral nature of these two bands is confirmed by comparison with three-dimensional tilted axis cranking calculations. This is the first observation of a three-quasiparticle chiral structure and establishes the primarily geometric nature of this phenomenon.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.132501
DOI:
10.1103/PhysRevLett.91.132501
PACS:
21.10.Re, 21.60.Ev, 23.20.Lv, 27.60.+j
 
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