Determination of /sup 193/Au and /sup 193/Hg atomic masses by the /sup 197/Au(. cap alpha. ,/sup 8/He)/sup 193/Au reaction

The atomic mass excess of /sup 193/Au was determined to be -33.419 +- 0.011 MeV for the first time from the measured Q value of -26.919 +- 0.009 MeV for the /sup 197/Au(..cap alpha..,/sup 8/He)/sup 193/Au reaction. The atomic mass excess of /sup 193/Hg was also determined to be -31.080 +- 0.032 MeV by using the known Q value of /sup 193/Hg beta decay to /sup 193/Au. These results were compared with some predicted values.