Distribution of vibrational populations of CO electronic states produced in CO2 photodissociation

Yehuda B. Band; Karl F. Freed

doi:10.1063/1.432099

Distribution of vibrational populations of CO electronic states produced in CO₂ photodissociation

Yehuda B. Band, Karl F. Freed

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

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Abstract

The vibrational distributions of CO(d ³Δ), COa′ ³Σ⁺), and CO(a ³Π) states produced from CO₂ photodissociation at various incident photon energies are calculated using a quantum mechanical theory of polyatomic molecule dissociation and are compared with experiment. It is assumed that CO(d ³Δ) and CO(a′ ³Δ⁺) are produced via direct photodissociation from the CO₂ ground state to a repulsive electronic state. Agreement between theoretical and experimental distribution are obtained. The CO(a ³Π) vibrational distribution calculated using the direct photodissociation assumption could not be made to agree with experiment. Evidence that the CO(a ³Π) dissociation in the photon energy range considered proceeds via a predissociative state of CO₂ is given. Comparisons are made with other models of dissociation.

Original language	English
Pages (from-to)	4329-4333
Number of pages	5
Journal	Journal of Chemical Physics
Volume	64
Issue number	11
DOIs	https://doi.org/10.1063/1.432099
State	Published - 1 Jan 1976
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Distribution of vibrational populations of CO electronic states produced in CO2 photodissociation",

abstract = "The vibrational distributions of CO(d 3Δ), COa′ 3Σ+), and CO(a 3Π) states produced from CO2 photodissociation at various incident photon energies are calculated using a quantum mechanical theory of polyatomic molecule dissociation and are compared with experiment. It is assumed that CO(d 3Δ) and CO(a′ 3Δ+) are produced via direct photodissociation from the CO2 ground state to a repulsive electronic state. Agreement between theoretical and experimental distribution are obtained. The CO(a 3Π) vibrational distribution calculated using the direct photodissociation assumption could not be made to agree with experiment. Evidence that the CO(a 3Π) dissociation in the photon energy range considered proceeds via a predissociative state of CO2 is given. Comparisons are made with other models of dissociation.",

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AU - Freed, Karl F.

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N2 - The vibrational distributions of CO(d 3Δ), COa′ 3Σ+), and CO(a 3Π) states produced from CO2 photodissociation at various incident photon energies are calculated using a quantum mechanical theory of polyatomic molecule dissociation and are compared with experiment. It is assumed that CO(d 3Δ) and CO(a′ 3Δ+) are produced via direct photodissociation from the CO2 ground state to a repulsive electronic state. Agreement between theoretical and experimental distribution are obtained. The CO(a 3Π) vibrational distribution calculated using the direct photodissociation assumption could not be made to agree with experiment. Evidence that the CO(a 3Π) dissociation in the photon energy range considered proceeds via a predissociative state of CO2 is given. Comparisons are made with other models of dissociation.

AB - The vibrational distributions of CO(d 3Δ), COa′ 3Σ+), and CO(a 3Π) states produced from CO2 photodissociation at various incident photon energies are calculated using a quantum mechanical theory of polyatomic molecule dissociation and are compared with experiment. It is assumed that CO(d 3Δ) and CO(a′ 3Δ+) are produced via direct photodissociation from the CO2 ground state to a repulsive electronic state. Agreement between theoretical and experimental distribution are obtained. The CO(a 3Π) vibrational distribution calculated using the direct photodissociation assumption could not be made to agree with experiment. Evidence that the CO(a 3Π) dissociation in the photon energy range considered proceeds via a predissociative state of CO2 is given. Comparisons are made with other models of dissociation.

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Distribution of vibrational populations of CO electronic states produced in CO₂ photodissociation

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