Eur. Phys. J. B 59, 167-172 (2007)
https://doi.org/10.1140/epjb/e2007-00277-1

Short and long consecutive pairs model in the interpretation of MFE and F-ODMR experiments in molecular crystals

¹ Unité Matériaux Avancés et Optronique, Faculté des Sciences de Tunis, Campus Universitaire, Tunis, 1002, Tunisia
² Institut Préparatoire aux Études d'Ingénieurs de Tunis, 2 Rue Jawaher Lel Nahrou Montfleury, 1008 Tunis, Tunisia
³ Institut des Nanosciences de Paris, Universités Paris 6 et Paris 7 Campus Boucicaut, 140 rue de Lourmel, 75015 Paris, France

Corresponding author: ^a tarek.barhoumi@ipeit.rnu.tn

Received: 15 July 2007
Revised: 31 August 2007
Published online: 10 October 2007

Abstract

We have presented a model of two consecutive pairs of triplet excitons, which consists of a succession of two pairs known as short pair and long pair with reference to their respective lifetimes. We have applied this model to the modulation of prompt fluorescence (PF) in crystalline tetracene by a static magnetic field (MFE) and a microwave field (F-ODMR). The two types of experiments have been enough perfectly reproduced by using the same set of kinetics constants. Thus, we have arrived to rise the inconsistencies which one reproached the Seventies kinetic model.