✦ LIBER ✦

Thermal state distributions deduced from (2 + 1) resonance enhanced multiphoton ionization of CO

✍ Scribed by Kenneth M. Beck; Kristine A.H. German; Wayne P. Hess

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 537 KB
Volume: 256
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(96)00447-2

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✦ Synopsis

We have recently compared the (2 + 1) resonance enhanced multiphoton ionization spectra of neutral CO products desorbed from CaCO 3 following pulsed UV excitation with those obtained from thermal (295 K) CO samples under similar low pressure and identical ionization conditions. As a result of this investigation, we have concluded that fitting the unresolved B-X (0-0) Q-band may lead to spurious temperature assignments with erroneous 'hotter' temperatures AT > 60 K assigned for product state distributions. Conversely, partially resolved Doppler-limited spectra are found to allow temperature assignments to within 10 K. This discrepancy may arise from line strength perturbation phenomena.

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