Dissociation dynamics of NH3(Ã1A″2). Experiment and theory

Michael N R Ashfold; CL BENNETT; RN DIXON

doi:10.1039/DC9868200163

Dissociation dynamics of NH₃(Ã¹A^″₂). Experiment and theory

Michael N R Ashfold, CL BENNETT, RN DIXON

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Abstract

The spectroscopy and predissociation of the vibronic levels of the Ã1A″2 excited states of NH3 and ND3 have been studied via Ã-X dispersed emission spectra, C′-Ã dispersed emission spectra and C′-Ã stimulated emission pumping, in each case following two-photon excitation to a selected intermediate level. The predissociation lifetimes span more than two orders of magnitude. The lowest levels predissociate by H(D) atom quantum tunnelling, the higher levels by vibrational rearrangement. A model calculation is presented to illustrate this mechanism for the v1= 1 levels of the Ã state, which are very short-lived.

Original language	English
Pages (from-to)	163-175
Number of pages	13
Journal	Faraday Discussions of the Chemical Society
Volume	82
DOIs	https://doi.org/10.1039/DC9868200163
Publication status	Published - 1986

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@article{e865a23451f641879f248d84fe3cb7eb,

title = "Dissociation dynamics of NH3({\~A}1A″2). Experiment and theory",

abstract = "The spectroscopy and predissociation of the vibronic levels of the {\~A}1A″2 excited states of NH3 and ND3 have been studied via {\~A}-X dispersed emission spectra, C′-{\~A} dispersed emission spectra and C′-{\~A} stimulated emission pumping, in each case following two-photon excitation to a selected intermediate level. The predissociation lifetimes span more than two orders of magnitude. The lowest levels predissociate by H(D) atom quantum tunnelling, the higher levels by vibrational rearrangement. A model calculation is presented to illustrate this mechanism for the v1= 1 levels of the {\~A} state, which are very short-lived.",

author = "Ashfold, {Michael N R} and CL BENNETT and RN DIXON",

year = "1986",

doi = "10.1039/DC9868200163",

language = "English",

volume = "82",

pages = "163--175",

journal = "Faraday Discussions of the Chemical Society",

issn = "0301-7249",

publisher = "Royal Society of Chemistry",

}

TY - JOUR

T1 - Dissociation dynamics of NH3(Ã1A″2). Experiment and theory

AU - Ashfold, Michael N R

AU - BENNETT, CL

AU - DIXON, RN

PY - 1986

Y1 - 1986

N2 - The spectroscopy and predissociation of the vibronic levels of the Ã1A″2 excited states of NH3 and ND3 have been studied via Ã-X dispersed emission spectra, C′-Ã dispersed emission spectra and C′-Ã stimulated emission pumping, in each case following two-photon excitation to a selected intermediate level. The predissociation lifetimes span more than two orders of magnitude. The lowest levels predissociate by H(D) atom quantum tunnelling, the higher levels by vibrational rearrangement. A model calculation is presented to illustrate this mechanism for the v1= 1 levels of the Ã state, which are very short-lived.

AB - The spectroscopy and predissociation of the vibronic levels of the Ã1A″2 excited states of NH3 and ND3 have been studied via Ã-X dispersed emission spectra, C′-Ã dispersed emission spectra and C′-Ã stimulated emission pumping, in each case following two-photon excitation to a selected intermediate level. The predissociation lifetimes span more than two orders of magnitude. The lowest levels predissociate by H(D) atom quantum tunnelling, the higher levels by vibrational rearrangement. A model calculation is presented to illustrate this mechanism for the v1= 1 levels of the Ã state, which are very short-lived.

U2 - 10.1039/DC9868200163

DO - 10.1039/DC9868200163

M3 - Article (Academic Journal)

SN - 0301-7249

VL - 82

SP - 163

EP - 175

JO - Faraday Discussions of the Chemical Society

JF - Faraday Discussions of the Chemical Society