Deformed rotational bands in the doubly odd nuclei 134Pr and 132Pr.

Abstract

The nuclei $^{132,134}\mathrm{Pr}$ have been investigated using the $^{100}\mathrm{Mo}$${(}^{37}$Cl,xn) reactions at a beam energy of 155 MeV. Gamma rays were detected with the Eurogam array. Analysis of the data has revealed the presence of two new weakly populated decoupled bands in $^{134}\mathrm{Pr}$. One of these bands has been linked into the normal-deformed states and is thought to be built on a \ensuremath{\pi}(${\mathit{h}}_{11/2}$${)}^{2}$\ensuremath{\bigotimes}\ensuremath{\nu}(${\mathit{f}}_{7/2}$,${\mathit{h}}_{9/2}$) configuration. The second band has been interpreted as being based on a \ensuremath{\pi}(${\mathit{h}}_{11/2}$${)}^{3}$\ensuremath{\bigotimes}\ensuremath{\nu}${\mathit{i}}_{13/2}$ intruder configuration within the second ${\mathrm{\ensuremath{\beta}}}_{2}$\ensuremath{\simeq}0.3 prolate minimum. The known decoupled band in $^{132}\mathrm{Pr}$ (5n reaction channel) and the highly deformed band in $^{130}\mathrm{La}$ A(\ensuremath{\alpha}3n) have also been extended. The structure of all of these bands is discussed together with similar bands in nieghboring odd-odd nuclei.