High-harmonic transient grating spectroscopy of NO2 electronic relaxation.
J Chem Phys
; 137(22): 224303, 2012 Dec 14.
Article
em En
| MEDLINE
| ID: mdl-23248999
ABSTRACT
We study theoretically and experimentally the electronic relaxation of NO(2) molecules excited by absorption of one â¼400 nm pump photon. Semiclassical simulations based on trajectory surface hopping calculations are performed. They predict fast oscillations of the electronic character around the intersection of the ground and first excited diabatic states. An experiment based on high-order harmonic transient grating spectroscopy reveals dynamics occurring on the same time scale. A systematic study of the detected transient is conducted to investigate the possible influence of the pump intensity, pump wavelength, and rotational temperature of the molecules. The quantitative agreement between measured and predicted dynamics shows that, in NO(2), high harmonic transient grating spectroscopy encodes vibrational dynamics underlying the electronic relaxation.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Chem Phys
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
França