Low field linear Stark effect on quasi-hydrogenic caesium series

2014 We present the experimental evidence of the linear Stark behaviour in an atomic spectrum at low (absolute) electric field strengths on high lying quasi-hydrogenic series of atomic caesium. This is the behaviour which would be observed on hydrogen atoms for any level. It is exhibited here in the 1-15 V/cm range on quasi-hydrogenic atoms, excited, in vapour phase, by a c.w. dye laser to n = 60 Rydberg states. Under these conditions, the core effects are almost negligible compared with the first linear-in-field term in the Stark expansion of the energy. J. Physique LETTRES 44 (1983) L-517 L-522 ler mILLET 1983, Classification Physics Abstracts 32.60F 32.80