Lifetime measurements of excited states in W162 and W164 and the evolution of collectivity in rare-earth nuclei
Makaleler > Tam Makale · 2017
Yazarlar: M. Doncel, B. Cederwall, C. Qi, H. Li, U. Jakobsson, K. Auranen, S. Bönig, M. C. Drummond, T. Grahn, P. T. Greenlees, A. Herzan, 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
Physical Review C, Uluslararası, Wos, 2017, cilt 95
DOI: 10.1103/physrevc.95.044321
Özet
Lifetimes of the first excited ${2}^{+}$ states in the extremely neutron-deficient $^{162}\mathrm{W}$ and $^{164}\mathrm{W}$ nuclei have been measured using the recoil distance Doppler shift technique. Experimental $B(E2)$ data for the isotopic chains of hafnium, tungsten, and osmium, from the midshell region near the $\ensuremath{\beta}$-stability line towards the $N=82$ closed shell and the most neutron-deficient nuclides, are compared with predictions of nuclear deformations and ${{2}_{1}}^{+}\ensuremath{\rightarrow}{{0}_{\mathrm{g}.\mathrm{s}.}}^{+}$ reduced transition strengths from different classes of state-of-the-art theoretical model calculations. The results reveal striking differences and deficiencies in the predictive power of current nuclear structure models.