Lifetime Measurements in $^{160}$Gd

ORAL

Abstract

The nature of low-lying excitations, K$^{\pi}=0^+$ bands in deformed nuclei remain enigmatic in the field, especially in relationship to quadrupole vibrations. One method of characterizing these states is by reduced transition probabilities, B(E2) values, a measure of the collectivity. These values can be measured directly by Coulomb excitation or calculated from measured lifetime values. Within the deformed region, there are five stable Gd isotopes, three of which have been studied to obtain B(E2) values, a fourth, $^{160}$Gd is the focus of this work. We have examined $^{160}$Gd with the (n,n$^{\prime}\gamma$) reaction and neutron energies up to 3.0 MeV to confirm known 0$^+$ states and to determine their lifetimes through DSAM measurements. Gamma-ray excitation functions and angular distribution measurements have been performed and preliminary results will be presented.

*This work has been supported in part under Contract Nos. PHY-08-22648 and PHY-12-05412 with the National Science Foundation.

Authors

  • S.R. Lesher

    • Univ. of Wisconsin - La Crosse
  • I. Marsh

    • Univ. of Wisconsin - La Crosse
  • A. Aprahamian

    • Univ. of Notre Dame
  • C. Casarella

    • Univ. of Notre Dame
  • M. Smith

    • Univ. of Notre Dame
  • B.P. Crider

    • Univ. of Kentucky
  • E.E. Peters

    • Univ. of Kentucky
  • S.W. Yates

    • Univ. of Kentucky