Evolution of collectivity approaching N=28 for silicon and sulfur isotopes

ORAL

Abstract

Excited states in neutron-rich silicon and sulfur nuclei have been studied at NSCL using inverse kinematics inelastic proton scattering. Exotic cocktail beams impinged upon a RIKEN liquid hydrogen target placed at the target position of the S800 spectrograph. Gamma-rays collected by SeGA (Segmented Germanium Array) were used to tag scattering events that excited specific states in each nucleus, and the S800 spectrograph provided event-by-event isotopic and reaction channel identification. Analysis of (p,p') excitation cross-sections provided information on nuclear deformation, while analysis of the gamma-ray spectra has identified new levels in these neutron-rich nuclei. The evolution of collectivity with increasing neutron number will be discussed.

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Authors

  • K. Starosta

  • C.M. Campbell

  • D. Bazin

  • M.D. Bowen

  • B.A. Brown

  • J.M. Cook

  • D.-C. Dinca

  • A. Gade

  • T. Glasmacher

  • W.F. Mueller

  • H. Olliver

  • J.R. Terry

  • K. Yoneda

    • Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University

  • N. Aoi

  • H. Sakurai

    • Department of Physics, University of Tokyo

  • S. Kanno

    • Department of Physics, Rikkyo University

  • T. Motobayashi

  • S. Takeuchi

    • RIKEN (Institute of Physical and Chemical Research)

  • S.P. Weppner

    • Collegium of Natural Sciences, Eckerd College