Two photon coincidence studies of resonant transfer and excitation of hydrogen-like S ions in hydrogen

Abstract We studied the process of resonant transfer and excitation of hydrogenlikc S projectiles in a hydrogen target by X ray-X ray coincidences. Information about the doubly excited intermediate state is obtained by analysing the sum energy spectra of the two time correlated X rays. This reveals a resonance behaviour of the cross sections for populating certain intermediate states as function of the projectile energy.