ISSN:
1432-0649
Keywords:
33
;
79
;
82.65
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract IR laser-induced ionization is investigated in condensed methanol (77 K) using a TEA CO2 laser for resonant vibrational excitation and a quadrupole mass spectrometer to analyse the ion spectra produced by laser irradiation. Ions are already detected at laser fluences below 1 J/cm2, far below dielectric breakdown. The fluence dependence of the ion yield is measured for two groups of ions and the total number of ions. A mechanism is proposed for the photochemical production of protonated molecules. The protonated monomer is the species with the highest abundance; however, protonated dimers and other quasimolecular ions and fragment ions are also found.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00688669
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