A K-PI=8- ISOMER IN SM-136

An isomer with a half-life of 15 +/- 1 mus has been observed in the N = 74 nucleus Sm-136, populated following the reaction (Ag(S,p2n)Sm)-Ag-107-S-32-Sm-136. It is proposed to have a K(pi) = 8- two quasineutron configuration. The isomer decays via a DELTAK = 8, 466 keV E1 transition with a surprisingly low hindrance per degree of K forbiddenness, f(nu) = 25.