  The rotational behaviour of T=0 and T=1 bands in the odd-odd N=Z nucleus 62Ga
is studied theoretically using the spherical shell model (laboratory frame) and
the cranked Nilsson-Strutinsky model (intrinsic frame). Both models give a good
description of available experimental data. The role of isoscalar and isovector
pairing in the T=0 and T=1 bands as functions of angular momentum is studied in
the shell model. The observed backbending in the T=0 band is interpreted as an
unpaired band-crossing between two configurations with different deformation.
The two configurations differ by 2p-2h and are found to terminate the
rotational properties at I\pi=9+ and I\pi=17+, respectively. E2-decay matrix
elements and spectroscopic quadrupole moments are calculated. From the CNS
calculation, supported by shell model results, it is suggested that the low
spin parts of the bands with T=0 and T=1 correspond to triaxially deformed
states with the rotation taking place around the shortest axis (positive
\gamma) and intermediate axis (negative \gamma), respectively. At lower spins
the configuration space pf_{5/2}g_{9/2}, used in the shell model calculation,
is found sufficient while also f_{7/2} becomes important above the backbending.
