Experimental and theoretical investigation of high-power laser ionization and dissociation of methane.
The main purpose of this paper is to report the high-power laser ionization-dissociation of CH(4) at various femtosecond (fs) laser intensities (from 1 x 10(14) W/cm(2) to 2 x 10(15) W/cm(2)) with a laser pulse duration of 48 fs. The generalized molecular Keldysh theory has been applied to calculate the ionization yields for CH(4)+ and CH(4)++. Outside the influence of the fs intense laser, we propose to calculate the mass spectra due to the decomposition of CH(4)+ and CH(4)++, using the Rice-Ramsperger-Kassel-Marcus (RRKM) theory. The agreement between the experimental mass spectra and calculated mass spectra seems to be reasonable.
Sharifi
M
M
Department of Physics, Engineering Physics and Optics, Laval University, Quebec City, Quebec, GIK 7P4, Canada.
Kong
F
F
Chin
S L
SL
Mineo
H
H
Dyakov
Y
Y
Mebel
A M
AM
Chao
S D
SD
Hayashi
M
M
Lin
S H
SH