Exploring the Level Structure of $^{59}$Co

ORAL

Abstract

Fusion evaporation reaction induced by a beam of 43MeV $^{14}$C on a $^{48}$Ti target has been used to populate the high spin levels in $^{59}$Co. Emitted $\gamma $ rays were detected using the FSU clover array which consists of 6 high purity germanium clover detectors (with BGO shields for Compton suppression) and a few single crystal detectors all placed at 3 different angles. The directional correlation from oriented states (DCO ratio) was measured using ratios of intensities from detectors at 90$^{o}$ and 135$^{o}$.The polarization was also measured, which in addition to the DCO ratio was used to determine the spin and parity of the new energy levels in the $^{59}$Co. Previously known spins in the $^{59}$Co were confirmed and their parity was assigned. Level scheme of the $^{59}$Co has been extended to 11139keV with J$^{\pi } \quad =$ 31/2$+$. The result was compared with the theoretical shell model calculations within the fp-g$_{9/2}$ shells valence space and was found to agree up to the single particle excitation.~Using same beam on $^{50}$Ti target. preliminary results of $^{61}$Co are also presented here. This work was supported by the U.S. National Science Foundation under grant number Phy-2012522.

*This work was supported by the U.S. National Science Foundation under grant number Phy-2012522.

Authors

  • Samuel Ajayi

    • Florida State University
  • Vandana Tripathi

    • Florida State University
  • Elizabeth Rubino

    • Florida State University
  • Rebeka Lubna

    • Florida State University
  • Caleb Benetti

    • Florida State University
  • Samuel Tabor

    • Florida State University
  • Yutaka Utsuno

    • Advanced Science Research Center, Japan Atomic Energy Agency
  • Noritaka Shimizu

    • Center for Nuclear Study, University of Tokyo
  • James Allmond

    • Oak Ridge National Laboratory, USA