Abstract

The atomic model that contains two autoionization levels coupled to the discrete ground state by an external laser field is discussed. In addition both autoionizing levels are coupled mutually by the dc-electric-field gradient. The analytical formula for the long-time photoelectron spectrum is found for this system. Calculations are performed that are valid for any strength of the laser field and the dc-electric-field gradient. The effects of the additional coupling by the dc-electric-field gradient on the photoelectron spectrum are discussed and illustrated graphically.

© 1991 Optical Society of America

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