High spin states are observed for the first time in the neutron-rich nuclei 151,153 Pr, 157 Sm, and 93 Kr from the spontaneous fission of 252 Cf. Twenty new transitions in 151 Pr, twelve in 153 Pr, five in 157 Sm, and four in 93 Kr were identified by using x-ray(Pr/Sm)-γ -γ and γ -γ -γ triple coincidences. From the measured total internal conversion coefficients α T of four low-energy transitions in 151,153 Pr, we determine that two bands in each nucleus have opposite parity. The interlacing E1 transitions between the bands suggest a form of parity doubling in 151,153 Pr. New bands in 157 Sm and 93 Kr are reported. The half-life of the 354.8 keV state in 93 Kr is measured to be 10(2) ns.