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          Institute: MPI für biophysikalische Chemie     Collection: Abteilungsunabhängige Arbeitsgruppen     Display Documents



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ID: 16642.0, MPI für biophysikalische Chemie / Abteilungsunabhängige Arbeitsgruppen
State-to-state rate constants for collision induced energy transfer of electronically excited NH2 with NH3
Authors:Lindner, J.; Wilhelm, R.
Language:English
Date of Publication (YYYY-MM-DD):2002-09-08
Title of Journal:Journal of Chemical Physics
Volume:117
Issue / Number:10
Start Page:4878
End Page:4888
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:Collisional energy transfer of NH2 in its electronically excited state (A) over tilde (2)A(1) is investigated with time- resolved Fourier transform emission spectroscopy. NH2 is produced by photodissociation of NH3 and relaxed to low rotational levels before excitation into the electronically excited state. Originating from collisions with NH3, rate constants for total collisional removal and state-to-state rate constants for rotational energy transfer within v(2)=4, K-a=1 with collision induced changes of \DeltaK(c)\less than or equal to3 are determined. The latter rate constants are fitted with several scaling laws. Among these, those based on the energy corrected sudden approximation work best. An approximate potential curve for the anisotropic part of the interaction potential is derived and verified with cross sections obtained with straight line trajectories. The rotational energy transfer originates primarily from collisions with small impact parameters. The observed rate constants for total collisional removal are in accordance with the collision complex model. (C) 2002 American Institute of Physics.
Comment of the Author/Creator:Date: 2002, SEP 8
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für biophysikalische Chemie/AG Peter Vöhringer
External Affiliations:Univ Hannover, Inst Quantum Opt, D-30167 Hannover, Germany
Identifiers:URL:http://scitation.aip.org/getpdf/servlet/GetPDFServ...
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