Photodissociation dynamics of NH3, NH2D, NHD2, and ND3: Rovibronic absorption analysis of the Ã-X̃ transition

Atsushi Nakajima, Kiyokazu Fuke, Keizo Tsukamoto, Yasushi Yoshida, Koji Kaya

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The photodissociation dynamics of à state ammonia molecules has been further investigated for deuterium-substituted derivatives NH2D, NHD2, and ND3 measuring the homogeneous line widths on action spectra. The line widths of the 201 vibronic band were determined to be 19, 12, and 1.3 cm-1 fwhm for NH2D, NHD2, and ND3, respectively. In consideration of our previously reported value of 26 cm-1 for NH3, the spectral line width decreases in proportion to the number of D atoms. This result shows that the dissociation rate in the à state is additive as for the number of H atoms, and it is explained by the fact that the zero-point energies on the potential surface of à state are equally shifted among deuterium-substituted ammonias.

Original languageEnglish
Pages (from-to)571-574
Number of pages4
JournalJournal of Physical Chemistry
Volume95
Issue number2
Publication statusPublished - 1991

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Photodissociation
Linewidth
photodissociation
deuterium
Deuterium
spectral line width
zero point energy
atoms
ammonia
Atoms
proportion
Surface potential
dissociation
Ammonia
Derivatives
molecules
Molecules

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Photodissociation dynamics of NH3, NH2D, NHD2, and ND3 : Rovibronic absorption analysis of the Ã-X̃ transition. / Nakajima, Atsushi; Fuke, Kiyokazu; Tsukamoto, Keizo; Yoshida, Yasushi; Kaya, Koji.

In: Journal of Physical Chemistry, Vol. 95, No. 2, 1991, p. 571-574.

Research output: Contribution to journalArticle

Nakajima, Atsushi ; Fuke, Kiyokazu ; Tsukamoto, Keizo ; Yoshida, Yasushi ; Kaya, Koji. / Photodissociation dynamics of NH3, NH2D, NHD2, and ND3 : Rovibronic absorption analysis of the Ã-X̃ transition. In: Journal of Physical Chemistry. 1991 ; Vol. 95, No. 2. pp. 571-574.
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abstract = "The photodissociation dynamics of {\~A} state ammonia molecules has been further investigated for deuterium-substituted derivatives NH2D, NHD2, and ND3 measuring the homogeneous line widths on action spectra. The line widths of the 201 vibronic band were determined to be 19, 12, and 1.3 cm-1 fwhm for NH2D, NHD2, and ND3, respectively. In consideration of our previously reported value of 26 cm-1 for NH3, the spectral line width decreases in proportion to the number of D atoms. This result shows that the dissociation rate in the {\~A} state is additive as for the number of H atoms, and it is explained by the fact that the zero-point energies on the potential surface of {\~A} state are equally shifted among deuterium-substituted ammonias.",
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