First observation of a rotational band and the role of the proton intruder orbital π1/2+[431] in very neutron-rich odd-odd Nb106

Y. X. Luo, J. O. Rasmussen, J. H. Hamilton, A. V. Ramayya, E. Wang, Y. X. Liu, C. F. Jiao, W. Y. Liang, F. R. Xu, Y. Sun, S. Frauendorf, J. K. Hwang, S. H. Liu, S. J. Zhu, N. T. Brewer, I. Y. Lee, G. M. Ter-Akopian, Yu. Oganessian, R. Donangelo, and W. C. Ma
Phys. Rev. C 89, 044326 – Published 30 April 2014

Abstract

A rotational band was observed for the first time in Nb106 by means of γ-γ-γ and γ-γ-γ-γ measurements of prompt fission γ rays from Cf252 by using the Gammasphere multidetector array. Projected shell model and potential-energy surface calculations were performed and were compared to the experimental data of Nb106 and the previously reported Nb104. Configurations and spin-parity were assigned to the ground level, low-lying levels, and rotational bandheads of the two Nb isotopes. The new rotational band in Nb106 was interpreted as a Kπ=2 band with a configuration π1/2+[431] × ν5/2[532]. The same spin-parity and configuration were assigned to the analogous band in Nb104. π1/2+[431] × ν5/2+[413], Kπ=3+ were assigned to the 0.66-μs isomer and explained the M2 isomeric decay to the ground in Nb106. The proton intruder orbital π1/2+[431] plays an important role in shape evolution with regard to triaxial deformation in these neutron-rich Nb isotopes.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
8 More
  • Received 26 November 2013
  • Revised 27 January 2014

DOI:https://doi.org/10.1103/PhysRevC.89.044326

©2014 American Physical Society

Authors & Affiliations

Y. X. Luo1,2, J. O. Rasmussen2,3, J. H. Hamilton1, A. V. Ramayya1, E. Wang1, Y. X. Liu4, C. F. Jiao5, W. Y. Liang5, F. R. Xu5, Y. Sun6,7, S. Frauendorf8,9, J. K. Hwang1, S. H. Liu1,10, S. J. Zhu1,11, N. T. Brewer1,12, I. Y. Lee2, G. M. Ter-Akopian13, Yu. Oganessian13, R. Donangelo14, and W. C. Ma15

  • 1Department of Physics, Vanderbilt University, Nashville, Tennessee 37235, USA
  • 2Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 3Department of Chemistry, University of California Berkeley, Berkeley, California 94720, USA
  • 4School of Science, Huzhou Teachers College, Huzhou 31300, China
  • 5School of Physics, Peking University, Beijing 100871, China
  • 6Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • 7Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 8Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
  • 9Institut für Strahlenphysik, FZD-Rossendorf, Postfach 510119, D-01314 Dresden, Germany
  • 10Department of Chemistry, University of Kentucky, Lexington, Kentucky 40505, USA
  • 11Department of Physics, Tsinghua University, Beijing 100084, China
  • 12Physics Devision, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
  • 13Flerov Laboratory for Nuclear Reactions, JINR, Dubna, Russia
  • 14Facultad de Ingenieria, Casilla de Correo 30, 11300 Montevideo, Uruguay
  • 15Mississippi State University, P. O. Drawer 5167, Mississippi State, Mississippi 39762, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 89, Iss. 4 — April 2014

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×