Centrifugal stretching from lifetime measurements in the ${}^{170}$Hf ground state band

Centrifugal stretching from lifetime measurements in the $^{170}$ Hf ground state band

M. K. Smith, V. Werner, J. R. Terry, N. Pietralla, P. Petkov, Z. Berant, R. J. Casperson, A. Heinz, G. Henning, R. Lüttke, J. Qian, B. Shoraka, G. Rainovski, E. Williams, and R. Winkler

Phys. Rev. C 87, 044317 – Published 11 April 2013

Abstract

Centrifugal stretching in the deformed rare-earth nucleus $^{170}$ Hf is investigated using high-precision lifetime measurements, performed with the New Yale Plunger Device at Wright Nuclear Structure Laboratory, Yale University. Excited states were populated in the fusion-evaporation reaction $^{124}$ Sn( $^{50}$ Ti,4n) $^{170}$ Hf at a beam energy of 195 MeV. Recoil distance doppler shift data were recorded for the ground state band through the $J = 16^{+}$ level. The measured $B (E 2)$ values and transition quadrupole moments improve on existing data and show increasing $β$ deformation in the ground state band of $^{170}$ Hf. The results are compared to descriptions by a rigid rotor and by the confined $β$ -soft rotor model.

4 More

Received 17 January 2013

DOI:https://doi.org/10.1103/PhysRevC.87.044317

Authors & Affiliations

M. K. Smith^1,2, V. Werner¹, J. R. Terry^1,*, N. Pietralla³, P. Petkov⁴, Z. Berant^1,5, R. J. Casperson^1,†, A. Heinz^1,‡, G. Henning^1,6,§, R. Lüttke^1,3,∥, J. Qian¹, B. Shoraka^1,7, G. Rainovski⁸, E. Williams^1,¶, and R. Winkler^1,*

¹Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8124, USA
²Nuclear Science Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA
³Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
⁴Bulgarian Academy of Sciences, Institute for Nuclear Research and Nuclear Energy, 1784 Sofia, Bulgaria
⁵Nuclear Research Center Negev, Beer-Sheva 84190, Israel
⁶ENS Cachan, 61 Avenue du Président Wilson, 94235 Cachan, France
⁷University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
⁸Faculty of Physics, St. Kliment Ohridski University of Sofia, Sofia 1164, Bulgaria

^*Present address: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
^†Present address: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
^‡Present address: Fundamental Physics, Chalmers University of Technology, SE-412-916 Göteborg, Sweden.
^§Present address: GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany.
^∥Present address: Technische Universität München, 80333 München, Germany.
^¶Present address: Department of Nuclear Physics, Australian National University, Canberra, Austalian Capital Territory 0200, Australia.

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 87, Iss. 4 — April 2013

Reuse & Permissions

Access Options

Article Available via CHORUS

Download Accepted Manuscript

Author publication services for translation and copyediting assistance advertisement

Physical Review C

covering nuclear physics