Q values for neutron-rich rubidium and lanthanum isotopes

Beta-ray end-point energies for Rb and La fission products were measured on an on-line mass separator using a hyperpure Ge ..beta.. spectrometer. Coincidence measurements were used to establish feeding relationships and to verify level schemes in daughter nuclides. Q/sub ..beta../ values are reported for /sup 88,94,96,98/Rb and /sup 146,148/La. Our results are compared with those from other experiments and with predictions of mass formulae.