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5 February 1999 Vibrational distribution of ions H+2 under multiphoton ionization of hydrogen molecules
G. V. Golubkov, G. K. Ivanov, S. V. Drygin
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Proceedings Volume 3732, ICONO '98: Laser Spectroscopy and Optical Diagnostics: Novel Trends and Applications in Laser Chemistry, Biophysics, and Biomedicine; (1999) https://doi.org/10.1117/12.340025
Event: ICONO '98: Laser Spectroscopy and Optical Diagnostics: Novel Trends and Applications in Laser Chemistry, Biophysics, and Biomedicine, 1998, Moscow, Russian Federation
Abstract
The four-photon (3 + 1) ionization of H2 molecule with population of intermediate Rydberg C1IIu state has been investigated. We analyzed this process using method of radiative collision T-matrix, where total wave function of the system with accounting for electromagnetic field in the final state is expressed via its elements. Formalism utilized allows to include naturally predissociation channel of intermediate complex H2** (u') resonance states concerned with transition into repulsive 1IIg state. Without field (f equals 0) it causes the ultimate shift of distribution function W0 to the greater u values with respect to Franck-Condon distribution. Interaction with field in final state forms the additional ionization channels and effects essentially on profile of ion distribution H2+ on final vibrational states that has nonmonotonic dependence on external field strength f. At low field strength f less than 10-5 a.u. it provides the additional field broadening of resonance levels and shift of spectrum pattern toward the less v values comparing with W0. This dependence becomes more complicated at higher field strength f greater than or equal to 10-4 a.u. that is connected with multiphoton character of absorption and appearing of new reaction channels. The dependence of ion H2+ vibrational distribution on strength magnitude is calculated.
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G. V. Golubkov, G. K. Ivanov, and S. V. Drygin "Vibrational distribution of ions H+2 under multiphoton ionization of hydrogen molecules", Proc. SPIE 3732, ICONO '98: Laser Spectroscopy and Optical Diagnostics: Novel Trends and Applications in Laser Chemistry, Biophysics, and Biomedicine, (5 February 1999); https://doi.org/10.1117/12.340025
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KEYWORDS
Ionization
Molecules
Ions
Absorption
Electromagnetism
Hydrogen
Scattering
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