First identification of rotational band structures in Re9175166
Makaleler > Tam Makale · 2015
Yazarlar: H. J. Li, M. Doncel, M. Patial, B. Cederwall, T. Bäck, U. Jakobsson, K. Auranen, S. Bönig, M. Drummond, T. Grahn, P. Greenlees, A. Herzáň, D. T. Joss, R. Julin, S. Juutinen, J. Konki, T. Kröll, M. Leino, C. McPeake, D. O'Donnell, R. D. Page, J. Pakarinen, J. Partanen, P. Peura, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Sarén, B. Sayğı, C. Scholey, J. Sorri, S. Stolze, M. J. Taylor, A. Thornthwaite, J. Uusitalo, Z. G. Xiao
Physical Review C, Uluslararası, Wos, 2015, cilt 92
DOI: 10.1103/physrevc.92.014310
Özet
Excited states in the odd-odd, highly neutron-deficient nucleus $^{166}\mathrm{Re}$ have been investigated via the $^{92}\mathrm{Mo}(^{78}\mathrm{Kr},\phantom{\rule{0.16em}{0ex}}3p1n)^{166}\mathrm{Re}$ reaction. Prompt $\ensuremath{\gamma}$ rays were detected by the JUROGAM II $\ensuremath{\gamma}$-ray spectrometer, and the recoiling fusion-evaporation products were separated by the recoil ion transport unit (RITU) gas-filled recoil separator and implanted into the Gamma Recoil Electron Alpha Tagging spectrometer located at the RITU focal plane. The tagging and coincidence techniques were applied to identify the $\ensuremath{\gamma}$-ray transitions in $^{166}\mathrm{Re}$, revealing two collective, strongly coupled rotational structures, for the first time. The more strongly populated band structure is assigned to the $\ensuremath{\pi}{h}_{11/2}[514]9/{2}^{\ensuremath{-}}\ensuremath{\bigotimes}\ensuremath{\nu}{i}_{13/2}[660]1/{2}^{+}$ Nilsson configuration, while the weaker structure is assigned to be built on a two-quasiparticle state of mixed $\ensuremath{\pi}{h}_{11/2}[514]9/{2}^{\ensuremath{-}}\ensuremath{\bigotimes}\ensuremath{\nu}[{h}_{9/2}{f}_{7/2}]3/{2}^{\ensuremath{-}}$ character. The configuration assignments are based on the electromagnetic characteristics and rotational properties, in comparison with predictions from total Routhian surface and particle-rotor model calculations.