Determination of the Multipolarity of the 0.3-secTa182Isomeric Transition by itsLX-ray Pattern Alone

Abstract

We have determined the multipolarity of the short-lived isomeric transition in ${\mathrm{Ta}}^{182}$ to be $M2\mathrm{}$; we have measured the half-life and transition energy; we have observed population of the state from 16-min ${\mathrm{Ta}}^{182m}$; and we make putative spin and parity assignments. Determination of the multipolarity was by a new method which should have applicability to other cases of low-energy highly converted transitions in nuclides with $Z>\mathrm{}60\mathrm{}$.