Anomalous behaviour of matter radii of proton-rich Ga, Ge, As, Se and Br nuclei

Proton-rich isotopes of Ga, Ge, As, Se and Br had their total reaction cross-sections (σR) measured. Root-mean-squared matter radii were determined from Glauber model calculations, which reproduced the experimental σR values. For all isotopic series a decrease of the rrms with increasing neutron number and a correlation with deformation was observed.