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See detailEnergy-transfer phenomena and dissociation processes in electronically excited molecules
Lorquet, Jean-Claude ULg; Elkomoss, S. G.; Magee, J. L.

in Journal of Chemical Physics (1962), 37(9), 1991-2000

This paper is an extension of previous work by Magee and Funabashi on the influence of electronic coupling on dissociation mechanisms. The same model (linear chain of diatomic molecules) has again been ... [more ▼]

This paper is an extension of previous work by Magee and Funabashi on the influence of electronic coupling on dissociation mechanisms. The same model (linear chain of diatomic molecules) has again been considered. The use of a dynamical version of the Hellmann-Feynman theorem allows the development of a unified treatment valid for any coupling. An application to an infinite linear chain of hydrogen moleculeions is made, and the following results are found: (1) In the weak-coupling case, immediate dissociation occurs. (2) In the intermediate case, the electronic excitation energy is converted into vibrational energy, mainly localized on the molecule initially excited. Redistribution of the vibrational energy then occurs. (3) In the strong-coupling case, dissociation does not occur. Many molecules vibrate with comparable amplitudes. Short chains, containing two, three, four, and seven molecules, are also considered. For these it is found that two or more dissociations usually occur regardless of the type of coupling and initial position of the excitation. Finally, an application to intramolecular energy transfer is attempted. The case of the radiation induced isomerization of cis-polybutadiene into its trans isomer, studied by Golub, is examined. With certain restrictions, our results can be considered as supporting Golub's views. [less ▲]

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See detailL’enfance comme champ d’intervention politique au Burkina Faso
Wouango, Joséphine ULg

Conference (2008, November 21)

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See detailEnfance et cinéma
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Conference given outside the academic context (2008)

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Scientific conference (2006, May 19)

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Mormont, Christian ULg

Article for general public (1997)

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in Espace de Libertés : Magazine du Centre d'Action Laïque (2007), 349

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See detailEnfance, culture, morale. Autour de Sartre lecteur et relecteur d’Alain
Cormann, Grégory ULg

Conference (2012, September 11)

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See detailEnfance, transmission et individualisation. Le cas des enfants mineurs du Katanga (RDC)
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Conference (2008, July)

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in Phainomenon : Revista de Fenomenologia (2006)

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Article for general public (1997)

Entretien avec Bernadette Bawin, sociologue.

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Scientific conference (2004)

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See detailL'enfant dans l'Égypte gréco-romaine
Marganne, Marie-Hélène ULg

in Revue de Pédiatrie (La) (1999), 30(298-7), 30-37

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in La Clinique lacanienne (2006), 10

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in Dossiers de l'A C T I F (1980), 3

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in Enfance : Psychologie, Pédagogie, Neuropsychiatrie, Sociologie (2005), 57(4), 299-317

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Dumortier, Jean-Louis ULg

in Revue de la Direction Générale de l’Organisation des Etudes (1980)

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Gauthier, Jean-Marie ULg

Book published by Dunod - 2e (2001)

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SENTERRE, Thibault ULg

in Dubru, Jean-Marie (Ed.) Prévention et Petite Enfance : Guide de Médicine Préventive du Nourrisson et du Jeunes Enfant (2011)

Detailed reference viewed: 16 (7 ULg)