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Robert J, Zappa F, de Carvalho CR, et al. Experimental evidence of twin fast metastable H(2(2)S) atoms from dissociation of cold H2 induced by electrons. Phys Rev Lett. 2013;111(18):183203doi: 10.1103/PhysRevLett.111.183203.
Robert, J., Zappa, F., de Carvalho, C. R., Jalbert, G., Nascimento, R. F., Trimeche, A., Dulieu, O., Medina, A., Carvalho, C., & Faria, N. V. (2013). Experimental evidence of twin fast metastable H(2(2)S) atoms from dissociation of cold H2 induced by electrons. Physical review letters, 111(18), 183203. https://doi.org/10.1103/PhysRevLett.111.183203
Robert, J, et al. "Experimental evidence of twin fast metastable H(2(2)S) atoms from dissociation of cold H2 induced by electrons." Physical review letters vol. 111,18 (2013): 183203. doi: https://doi.org/10.1103/PhysRevLett.111.183203
Robert J, Zappa F, de Carvalho CR, Jalbert G, Nascimento RF, Trimeche A, Dulieu O, Medina A, Carvalho C, Faria NV. Experimental evidence of twin fast metastable H(2(2)S) atoms from dissociation of cold H2 induced by electrons. Phys Rev Lett. 2013 Nov 01;111(18):183203. doi: 10.1103/PhysRevLett.111.183203. Epub 2013 Oct 30. PMID: 24237516.
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Phys Rev Lett. 2013 Nov 01;111(18):183203. doi: 10.1103/PhysRevLett.111.183203. Epub 2013 Oct 30.

Experimental evidence of twin fast metastable H(2(2)S) atoms from dissociation of cold H2 induced by electrons.

Physical review letters

J Robert, F Zappa, C R de Carvalho, Ginette Jalbert, R F Nascimento, A Trimeche, O Dulieu, Aline Medina, Carla Carvalho, N V de Castro Faria

Affiliations

  1. Laboratoire Aimé Cotton, CNRS/Univ Paris-Sud/ENS Cachan, Bâtiment 505, Campus d'Orsay, 91405 Orsay Cedex, France.

PMID: 24237516 DOI: 10.1103/PhysRevLett.111.183203

Abstract

We report the direct detection of two metastable H(2^{2}S) 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 to the collision center, measure the neutral metastable H(2(2)S) through a localized quenching process, which mixes the H(2^{2}S) state with the H(2^{2}P), leading to a Lyman-α detection. Our data show the accomplishment of a coincidence measurement which proves for the first time the existence of the H(2(2)S)-H(2(2)S) dissociation channel.

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