Search for an M0 transition in 170Yb

We have examined the suggestion that an M0 transition occurs between the 2819.6-keV 0- level of 170Yb and the 0+ ground state by internal-conversion electron emission. Gamma rays, internal-conversion electrons, and internal e+e- pairs were detected from the β+ and electron capture decay of two-day 170Lu (0+). At an upper limit of 2x10-8 electron per 170Lu decay, no evidence was obtained for M0 decay of the 2819.6-keV level of 170Yb by single-electron emission