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Predissociation lifetimes of the B̃ and C̃ Rydberg states of CH3I

✍ Scribed by Jack A. Syage

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
457 KB
Volume
212
Category
Article
ISSN
0009-2614

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✦ Synopsis

Single-photon direct absorption and resonance-enhanced multiphoton ionization excitation spectra were recorded for CHJ in a jet-cooled molecular beam. The rovibrationally cold molecules yield lineshapes that are lifetime broadenend by predissociation.

Lorentzian fitswere used to extract lifetimes for specific vibronic excitation in the fj and c Rydberg states. The measured lifetimes of the B state are 0.87 ps (origin), 0.83 ps (ul), 0.92 ps (vg), and 0.67 ps (I& The e state origin has a lifetime of 0.25 ps. These results are compared to previous measurements and discussed in terms of possible mode-specific predissociation.

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