Masses of /sup 77/Kr and /sup 75/Kr

The masses of /sup 77/Kr and /sup 75/Kr were determined by measuring the Q values of the /sup 80/Kr(/sup 3/He,/sup 6/He)/sup 77/Kr, /sup 78/Kr(d,t)/sup 77/Kr, and /sup 78/Kr(/sup 3/He,/sup 6/He)/sup 75/Kr reactions. We find that the /sup 77/Kr and /sup 75/Kr mass excesses are -70.160(10) and -64.231(16) MeV, respectively. These new results are integrated into the total scheme of mass measurements in the light rubidium and krypton isotopes. Comparisons with several mass formulae are presented.