ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Multiphoton ionization and fragmentation of the hydrogen iodide molecule have been examined at 355 and 532 nm and optical field intensities of 1011−5×1012 W cm−2 by photoelectron spectroscopy and time-of-flight mass spectrometry. At 532 nm, scission of the H–I bond is favored over direct photoionization of the molecule. Three and four photon ionization of HI at 355 nm ((h-dash-bar)ω≈3.5 eV), however, reveals clear vibrational progressions associated with the HI+ 2Π3/2 and 2Π1/2 ion product states. Analysis of these spectra yields vibrational frequencies for the 2Π3/2 and 2Π1/2 states that agree to better than 8% with those determined by Böwering et al. [Chem. Phys. Lett. 189, 467 (1992)] from single photon ionization experiments. Above threshold ionization (ATI) of both HI and atomic iodine are also observed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.468490
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