In-beamγspectroscopy of the even-even nucleusPt190

Abstract

High-spin states of $^{190}\mathrm{Pt}$ have been reinvestigated using the $^{176}\mathrm{Yb}$($^{18}\mathrm{O}$, $4n$) reaction at a beam energy of 88 MeV. The previously known positive parity band associated with the $\ensuremath{\nu}$${i}_{13/2}^{\ensuremath{-}2}$$\ensuremath{\nu}$${h}_{9/2}^{\ensuremath{-}1}$$\ensuremath{\nu}$${j}^{\ensuremath{-}1}$ ($\ensuremath{\nu}$$j$ being $\ensuremath{\nu}$${p}_{3/2}$ or $\ensuremath{\nu}$${f}_{5/2}$) configuration has been revised and extended significantly. A new negative parity band has been established and proposed to be based on the $\ensuremath{\nu}$${i}_{13/2}^{\ensuremath{-}3}$$\ensuremath{\nu}$${j}^{\ensuremath{-}1}$ configuration. Possible structure evolution of the yrast line from predominantly vibrational to rotational with increasing spin is discussed with the help of $E\ensuremath{\gamma}$ over spin curves. Additionally, calculations of total Routhian surfaces have been performed to investigate the band properties.