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27 April 2024

» arxiv » 1307.1686

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Experimental evidence of twin fast metastable H(2S) atoms from dissociation of cold H_2 induced by electrons
J. Robert ; F. Zappa ; C.R. Carvalho ; Ginette Jalbert ; R.F.Nascimento ; A. Trimeche ; O. Dulieu ; Aline Medina ; Carla Carvalho ; N. V. de Castro Faria ;
Date:	5 Jul 2013
Abstract:	We report the direct detection of two metastable H(2S) atoms coming from the dissociation of a single cold H_2 molecule, in coincidence measurements. The molecular dissociation was induced by electron impact in order to avoid limitations by the selection rules governing radiative transitions. Two detectors, placed close from the collision center, measure the neutral metastable H(2S) through a localized quenching process, which mixes the H(2S) state with the H(2P), leading to a Lyman-alpha detection. Our data show the accomplishment of a coincidence measurement which proves for the first time the existence of the H(2S)-H(2S) dissociation channel.
Source:	arXiv, 1307.1686
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