Selective infrared excitation in D2CO: Rotational assignments and the role of collisions

Brian J. Orr; John G. Haub

doi:10.1364/OL.6.000236

Selective infrared excitation in D₂CO: Rotational assignments and the role of collisions

Brian J. Orr, John G. Haub

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

A time-resolved infrared-ultraviolet double-resonance technique is used to characterize specific rovibrationa] states pumped by a pulsed CO₂ laser within the v₄ vibrational ladder of D₂CO. The roles of rotational and quasiresonant rovibrational relaxation, requiring, respectively, ≤1 and ~3 gas-kinetic collisions, are studied. The rotational specificity of the latter suggests that a collision-assisted sequence of infrared absorption steps is able to account for the selective initial stages of multiple-photon excitation in formaldehyde.

Original language	English
Pages (from-to)	236-238
Number of pages	3
Journal	Optics Letters
Volume	6
Issue number	5
DOIs	https://doi.org/10.1364/OL.6.000236
Publication status	Published - 1981
Externally published	Yes

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title = "Selective infrared excitation in D2CO: Rotational assignments and the role of collisions",

abstract = "A time-resolved infrared-ultraviolet double-resonance technique is used to characterize specific rovibrationa] states pumped by a pulsed CO2 laser within the v4 vibrational ladder of D2CO. The roles of rotational and quasiresonant rovibrational relaxation, requiring, respectively, ≤1 and ~3 gas-kinetic collisions, are studied. The rotational specificity of the latter suggests that a collision-assisted sequence of infrared absorption steps is able to account for the selective initial stages of multiple-photon excitation in formaldehyde.",

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AB - A time-resolved infrared-ultraviolet double-resonance technique is used to characterize specific rovibrationa] states pumped by a pulsed CO2 laser within the v4 vibrational ladder of D2CO. The roles of rotational and quasiresonant rovibrational relaxation, requiring, respectively, ≤1 and ~3 gas-kinetic collisions, are studied. The rotational specificity of the latter suggests that a collision-assisted sequence of infrared absorption steps is able to account for the selective initial stages of multiple-photon excitation in formaldehyde.

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ER -

Selective infrared excitation in D₂CO: Rotational assignments and the role of collisions

Abstract

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