Band Structures and Nucleon Alignments in $^{173,175}$W

ORAL

Abstract

Spectroscopic study of nuclei in the A$\sim$180 region is essential to better understand regional relationships between Nilsson orbitals. Highly excited rotational states in both nuclei were populated at Argonne National Laboratory via a 230 MeV $^{50}$Ti beam from the ATLAS accelerator incident on a $^{128}$Te target. The Gammasphere array was used to detect $\gamma$ decays from excited states. Rotational bands built on the level 1/2$^-$[521], p$_{3/2}$ in $^{173,175}$W have been extended to spins of 40 and 35$\hbar$ respectively, and bands built on the 7/2$^+$[633], i$_{13/2}$ configuration extended to 38 and 27$\hbar$ respectively. New sidebands in $^{173}$W have been observed in all previously-discovered bands. Alignments from i$_{13/2}$ neutron and h$_{11/2}$ proton crossings are consistent with predictions of Woods-Saxon cranking calculations. Experimental results and regional systematics will be presented.

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Authors

  • C.J. Guess

    • Department of Physics, University of Massachusetts Lowell, Lowell, MA 01854, USA

  • S.K. Tandel

    • Department of Physics, University of Massachusetts Lowell, Lowell, MA 01854, USA

  • P. Chowdhury

    • Department of Physics, University of Massachusetts Lowell, Lowell, MA 01854, USA

  • U. Shirwadkar

    • Department of Physics, University of Massachusetts Lowell, Lowell, MA 01854, USA

  • M.P. Carpenter

    • Argonne National Laboratory, Argonne, IL 60439, USA

  • R.V.F. Janssens

    • Argonne National Laboratory, Argonne, IL 60439, USA

  • T.L. Khoo

    • Argonne National Laboratory, Argonne, IL 60439, USA

  • T. Lauritsen

    • Argonne National Laboratory, Argonne, IL 60439, USA

  • C.J. Lister

    • Argonne National Laboratory, Argonne, IL 60439, USA

  • D. Seweryniak

    • Argonne National Laboratory, Argonne, IL 60439, USA

  • X. Wang

    • Argonne National Laboratory, Argonne, IL 60439, USA

  • S. Zhu

    • Argonne National Laboratory, Argonne, IL 60439, USA

  • D.J. Hartley

    • Department of Physics, U.S. Naval Academy, Annapolis, MD 21402, USA