Výsledky vyhledávání - "Jean-Louis Lemaire"

Morphology of the solid water synthesized through the pathway D + O2 studied by the sensitive TPD technique

Autor: Mario Accolla, Jean-Louis Lemaire, François Dulieu, E. Congiu, V. Pirronello, H. Chaabouni, G. Manicò

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2013, 429 (4), pp.3200-3206. ⟨10.1093/mnras/sts578⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2013, 429 (4), pp.3200-3206. ⟨10.1093/mnras/sts578⟩

We report on an experimental study on the formation of water, through the D + O2 pathway, on a sample of amorphous solid water, i.e. a realistic analogue of the surface of the interstellar grains of dense clouds. For improving our experimental condit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb8c039740eae1c390e55d5e97eb07a0
https://doi.org/10.1093/mnras/sts578

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Experimental study of H atom recombination on different surfaces in relation to H− negative ion production

Autor: S. Aleiferis, J. Bentounes, Lisseth Gavilan, Ana Lacoste, Alexandre Bes, Stephane Bechu, Panagiotis Svarnas, Jean-Louis Lemaire

Publikováno v: AIP Conference Proceedings
5th International Symposium on Negative Ions, Beams and Sources (NIBS’16)
5th International Symposium on Negative Ions, Beams and Sources (NIBS’16), Sep 2016, Oxford, United Kingdom. pp.020011, ⟨10.1063/1.4995717⟩
5th International Symposium on Negative Ions, Beams and Sources (NIBS’16), Sep 2016, Oxford, United Kingdom. AIP Conference Proceedings, 1869, pp.020011 2017, ⟨10.1063/1.4995717⟩

International audience; Volume production of H- negative ions is mostly attributed to the dissociative attachment (DA) of electrons to ro-vibrationally excited molecules.1,2 Apart from the main formation path for enriching the plasma with these molec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35f36c13d2b2c85ceedd4f02b993748a
https://hal-insu.archives-ouvertes.fr/insu-01616032

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Hard X-ray irradiation of cosmic silicate analogs: structural evolution and astrophysical implications

Autor: T Sabri, Damien Salomon, E. Foy, Cornelia Jäger, Lisseth Gavilan, Jean-Louis Lemaire, Alexandre Simionovici, Th. Henning, S. Yagoubi, Gema Martínez-Criado

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2016, 587, pp.A144. ⟨10.1051/0004-6361/201527708⟩
Astronomy and Astrophysics-A&A, 2016, 587, pp.A144. ⟨10.1051/0004-6361/201527708⟩

[Context] Protoplanetary disks, interstellar clouds, and active galactic nuclei contain X-ray-dominated regions. X-rays interact with the dust and gas present in such environments. While a few laboratory X-ray irradiation experiments have been perfor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb533a32bea261875a0e54e7d203e45f
http://hdl.handle.net/10261/185984

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Are molecule-covered dust grains efficient catalysts of H2 formation in the cold ISM?

Autor: Jean-Louis Lemaire, Gianfranco Vidali, Lisseth Gavilan

Publikováno v: Monthly Notices of the Royal Astronomical Society. 424:2961-2970

The formation of H2 in the interstellar medium (ISM) involves complex processes, some of which are still not understood. In cold regions, it is assumed that H2 formation follows Langmuir kinetics, i.e. the immediate desorption of incoming atoms or mo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8434ed0727fc3df9d711b6668abe59fb
https://doi.org/10.1111/j.1365-2966.2012.21463.x

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Differential adsorption of complex organic molecule isomers on interstellar ice surfaces

Autor: Julien Pilmé, M. Lattelais, X. Michaut, François Dulieu, Jean-Louis Lemaire, H. Mokrane, Pascal Jeseck, C. Romanzin, E. Congiu, H. Chaabouni, Jean-Hugues Fillion, S. Baouche, F. Pauzat, Mathieu Bertin, C. Minot, Y. Ellinger

Publikováno v: EAS Publications Series. 58:349-352

Context. Over 20 of the ~150 different species detected in the interstellar and circumstellar media have also been identified in icy environments. For most of the species observed so far in the interstellar medium (ISM), the most abundant isomer of a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::62fc63bf4a82ba3ce81b4e68210cc06b
https://doi.org/10.1051/eas/1258057

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Nuclear spin conversion of molecular hydrogen on amorphous solid water in the presence of O2traces

Autor: X. Michaut, H. Mokrane, Jean-Louis Lemaire, J. H. Fillion, François Dulieu, H. Chaabouni, E. Congiu, M. Chehrouri, E. Matar

Publikováno v: Phys. Chem. Chem. Phys.. 13:2172-2178

Nuclear spin conversion (NSC) of ortho- to para-H(2) and para- to ortho-D(2) has been investigated on an amorphous solid water (ASW) surface at 10 K, in the presence of co-adsorbed O(2). The dynamics of the nuclear spin conversion could be revealed b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aedcb1feb1c8ae2c59c4b09eee2ef84f
https://doi.org/10.1039/c0cp01322f

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Observational 2D model of H2emission from a bow shock in the Orion Molecular Cloud

Autor: M. Gustafsson, S. Diana, G. Pineau des Forêts, David J. Field, T. Ravkilde, L. E. Kristensen, Jean-Louis Lemaire, S. Cabrit

Publikováno v: Kristensen, L E, Ravkilde, T L, Des Forêts, G P, Cabrit, S, Field, D, Gustafsson, M, Diana, S & Lemaire, J L 2008, ' Observational 2D model of H 2 emission from a bow shock in the Orion Molecular Cloud ', Astronomy and Astrophysics, vol. 477, no. 1, pp. 203-211 . https://doi.org/10.1051/0004-6361:20078100
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2008, 477, pp.203-211. ⟨10.1051/0004-6361:20078100⟩

International audience; Aims:We present a new method for reproducing high spatial resolution observations of bow shocks by using 1D plane parallel shock models. As an example we analyse one bow shock located in the Orion Molecular Cloud (OMC1). Metho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ad58185da06541cc02d685ee834e55d
https://doi.org/10.1051/0004-6361:20078100

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Physisorption and desorption of H2, HD and D2 on amorphous solid water ice. Effect on mixing isotopologue on statistical population of adsorption sites

Autor: L. Amiaud, François Dulieu, A. Momeni, Jean-Hugues Fillion, Jean-Louis Lemaire

Publikováno v: Physical Chemistry Chemical Physics
Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2015, 17 (44), pp.30148-30157. ⟨10.1039/C5CP03985A⟩
Physical Chemistry Chemical Physics, 2015, 17 (44), pp.30148-30157. ⟨10.1039/C5CP03985A⟩

We study the adsorption and desorption of three isotopologues of molecular hydrogen mixed on 10 ML of porous amorphous water ice (ASW) deposited at 10 K. Thermally programmed desorption (TPD) of H2, D2 and HD adsorbed at 10 K have been performed with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab511996e0fb4d101fda068ba857aa7e
https://pubmed.ncbi.nlm.nih.gov/26503710

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