  The first systematic experimental study of the neutron-rich Br isotopes with
two complementary state-of-the-art techniques is presented. These isotopes have
been populated in the fission process at two different facilities, GANIL and
ILL. New spectroscopic information has been obtained for odd-even $^{87-93}$Br
isotopes and the experimental results have been compared with state-of-the-art
Large-Scale Shell-Model and DNO Shell-Model calculations. As a result of such
theoretical approaches, a transition from prolate ($^{87,89}$Br) to oblate
($^{91,93}$Br) shapes is obtained from the subtle balance between proton and
neutron quadrupole deformations, as a clear signature of pseudo-SU3 quadrupole
regime.
