Collective rotation of an oblate nucleus at very high spin

C.M. Petrache (1) , S. Frauendorf , B.F. Lv (1) , A. Astier (1) , E. Dupont (1) , S. Guo , M.L. Liu , X.H. Zhou , K.L. Wang , P.T. Greenlees , H. Badran , D.M. Cox , T. Grahn , R. Julin , S. Juutinen , J. Konki , J. Pakarinen , P. Papadakis , J. Partanen , P. Rahkila , M. Sandzelius , J. Saren , C. Scholey , J. Sorri , S. Stolze , J. Uusitalo , B. Cederwall , Ö. Aktas , A. Ertoprak , H. Liu , I. Kuti , J. Timár , A. Tucholski , J. Srebrny , C. Andreoiu

1 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière

A sequence of nine almost equidistant quadrupole transitions is observed in Nd137. The sequence represents an extremely regular rotational band that extends to a spin of about 75/2 and an excitation energy of ≈4.5MeV above yrast. Cranked mean-field calculations of the Nilsson-Strutinsky type suggest an oblate shape for the band. They reproduce the observed I(I+1) dependence of the rotational energy whereas predicting a pronounced decrease in the deformation, which is the hallmark of antimagnetic rotation.

Mots clés: Nuclear Structure

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

C.M. Petrache, S. Frauendorf, B.F. Lv, A. Astier, E. Dupont, et al.. Collective rotation of an oblate nucleus at very high spin. Phys.Rev.C, 2019, 99 (4), pp.041301. ⟨10.1103/PhysRevC.99.041301⟩. ⟨hal-02123364⟩