Eur. Phys. J. A 15, 417-420 (2002)
DOI: 10.1140/epja/i2002-10081-1

Short Note

Candidates for chiral doublet bands in

E. Mergel¹, C.M. Petrache², G. Lo Bianco², H. Hübel¹, J. Domscheit¹, D. Roßbach¹, G. Schönwaßer¹, N. Nenoff¹, A. Neußer¹, A. Görgen¹, F. Becker³, E. Bouchez³, M. Houry³, A. Hürstel³, Y. Le Coz³, R. Lucas³, Ch. Theisen³, W. Korten³, A. Bracco⁴, N. Blasi⁴, F. Camera⁴, S. Leoni⁴, F. Hannachi⁵, A. Lopez-Martens⁵, M. Rejmund⁵, D. Gassmann⁶, P. Reiter⁶, P.G. Thirolf⁶, A. Astier⁷, N. Buforn⁷, M. Meyer⁷, N. Redon⁷ and O. Stezowski<sup>7

1</sup>  Institut für Strahlen- and Kernphysik, Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany
²  Dipartimento di Fisica, Università di Camerino, via Madonna delle Carceri, I-62032 Camerino, and INFN, Sezione di Perugia, Italy
³  DAPNIA/SPhN, CEA Saclay, F-91191 Gif-sur-Yvette, France
⁴  Dipartimento di Fisica and INFN, Sezione di Milano, via Celoria 16, I-20133 Milano, Italy
⁵  CSNSM, IN2P3/CRNS, F-91405 Orsay, France
⁶  Sektion Physik, Ludwig Maximilians-Universität München, D-85748 Garching, Germany
⁷  Institut de Physique Nucléaire, IN2P3/CNRS, Université C. Bernard Lyon-1, F-69622 Villeurbanne Cedex, France

costel.petrache@unicam.it

(Received: 23 May 2002 / Published online: 27 November 2002)

Abstract
The even-even nucleus ¹³⁶Nd was studied via in-beam -ray spectroscopy using the reaction at 100 MeV and the EUROBALL array. One new dipole band was observed. Together with a previously identified dipole band, whose position in the level scheme is revised, the new band forms a doublet structure similar to the recently observed chiral bands in the odd-odd neighboring nuclei. This would be the first case of a chiral doublet in an even-even nucleus.

PACS
23.20.Lv - Gamma transitions and level energies.
21.10.Re - Collective levels.
21.60.Ev - Collective models.
27.60.+j - .

© Società Italiana di Fisica, Springer-Verlag 2002