An excited isomeric state has been identified in the At-196 nucleus using t
he recoil decay tagging technique. This is the first identification of an e
xcited state in this neutron-deficient odd-odd nucleus. Several tentative p
rompt gamma-rays have also been correlated with At-196 alpha-decay, althoug
h it has not been possible to assign them to specific energy levels in At-1
96. The mean lifetime of the isomeric state has been measured as tau = 11 /- 2 mu s. The new level is compared with similar low-lying states in neigh
bouring nuclei and is de-excited by an E2 gamma-ray transition, the large h
indrance of which is not expected.