Some experimental results concerning the decay times of the luminescence emission of Pbe+ centres in KCl and NaCl crystals are reported and discussed in order to clarify the origin of the two emissions excitable in the A absorption band. The experimental features support the luminescent Pbe+ centre model implying a resonant energy transfer.Des r6sultats experimentaux concernant l'extinction des 6missions luminescentes des centres Pb2+ en cristaux de NaCl et KCl sont pr6sentks et discutes dans le but de clarifier l'origine des deux 6missions produites par irradiation dans la bande A d'absorption. Les donnks exp6rimentales sont en bien accord avec le modhle de centre luminescent impliquant un transfert r6sonan. d'6nergie.
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