J. Phys. IV France 03 (1993) C6-207-C6-216
Coherence between the excitation of states with different energiesJ.A. DE GOUW, J. VAN ECK, S. VAN DER AART and H.G.M. HEIDEMAN
Debye Institute, Department of Atomic and Interface Physics, Utrecht University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands
In recent experiments we have shown both in electron impact and in photoionisation studies the possibility to determine coherences between the excitation of states of different energies. In this paper the consequences of applying coincident techniques to these experiments are discussed. In a coincidence experiment one has to choose, however, for lower energy resolutions in order to reach sufficient count rates. We present an experiment which shows that these lower resolutions do not totally obscure the formerly observed interference effects, thus proving the feasibility of a future coincidence experiment.
© EDP Sciences 1993