Year: 2011
Author: Debra Jo Scardino, Matthew D. McDowell, Jacob D. Graham, Nathan I. Hammer
Journal of Atomic and Molecular Sciences, Vol. 2 (2011), Iss. 2 : pp. 93–98
Abstract
The study of the multiphoton ionization of methyl iodide has a long and storied history. Here, we revisit this topic and present spectra of each of the photoionization and photodissociation fragments ($C^{+},$ $CH^{+},$ $CH_{2}^{+},$ $CH_{3}^{+},$ $CH_{3}I^{+},$ and $I^{+}$) using a custom time-of-flight mass spectrometer and a tunable dye laser over the excitation range of 550-740 nm (2.2-1.67 eV). The choice of this wavelength range allows for excitation through the $A$ state and resonant ionization through higher energy levels using 4+1, 5+1, or 6+1 photons for excitation and ionization. Although the various fragments yield very similar spectra, fewer fragment ions are observed with increasing wavelength.
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Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/jams.010511.011411a
Journal of Atomic and Molecular Sciences, Vol. 2 (2011), Iss. 2 : pp. 93–98
Published online: 2011-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 6
Keywords: methyl iodide multiphoton ionization photofragmentation photoionization mass spectra.