Single and multiphoton transitions during atomic and molecular collision in laser fields

B. I. Ermolaev, V. E. Khartsiev

В.В. Лиханский

N. K. Rahman, Carla Guidotti

Merging two subfields, collisions and spectroscopy, this book presents the latest research proposals, innovative experiments and fresh ideas. Topics considered include radiative collision induced electron continuum-continuum scattering; models of laser-induced chemical reactions; experimental studies of laser-induced ionizing collisions; laser photodissociation of Na/sub 2/ + ions produced by laser resonant ionization of Na vapor; steady-state electron-atom collision in a laser field; conditions for the observation of the predicted splitting of the laser assisted electron impact of the differential cross section of atoms; transitions between resonances; some proposals for experiments; above-threshold multiphoton ionization; observability of optical collisions in the frequency and the time domain; laser switched collisions - a diagrammatical approach; polarization of atomic fluorescence excited by molecular photodissociation; multiphoton selective excitation; on the role of chaotic dynamics with many basins of attraction; predissociation in a strong electromagnetic field; theory of double resonance; and coherent excitation of polyatomic molecules up to highly excited vibrational states by laser light.

Vladimir V. Likhanskii

Shih‐I Chu

This report discusses: Microwave Driven Multiphoton Excitation Dynamics in Rydberg Atoms; Nonadiabatic Geometric Phases of Multiphoton Transitions in Dissipative Systems and Spin-j Systems; and Nonperturbative Treatments of Atomic and Molecular Processes in Intense Laser Fields.

C. Jung

How much information about a laser field can be reconstructed is considered if multiphoton transitions have been measured but if the laser-flux distribution in the experiment is unknown. It is shown how this reconstruction is done in detail if the relative strengths of the photon replicas of some atomic or molecular transitions are given. The resulting information about the laser field turns out to be the power moments of a weight function which indicates the relative weight with which a particular laser-flux value has contributed to the observed multiphoton transitions. Some analytically soluble examples are presented for the connection between the laser-flux distribution in space and time, the resulting moments of the weight function, and the weight function itself.