Nontrivial aspects of the onset of nuclear collectivity: Static moments.

We consider several topics concerning static magnetic dipole and electric quadrupole moments ({mu} and {ital Q}) as signatures of the onset of nuclear collectivity. Having previously noted that in {sup 50}Cr there is an abrupt change of sign in {ital Q} of yrast states with {ital J}{sup {pi}}=10{sup +},12{sup +}, and 14{sup +} relative to lower {ital J} states, we discuss whether these states are oblate or prolate. We next show that configuration mixing leads to much larger changes in {ital Q} than in {mu}. We then look for other bands of interest in {sup 50}Cr. Finally we discuss the Jolos{endash}von Brentano relationship which relates {ital Q} of 2{sub 1}{sup +} states to {ital B}({ital E}2){close_quote}s for transitions from and to the 2{sub 1}{sup +} states. {copyright} {ital 1996 The American Physical Society.}