Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Alain Baumer"'
Autor:
Philibert Iacconi, H. Prevost, Mourad Benabdesselam, Alain Baumer, Dominique Lapraz, Philippe Blanc
Publikováno v:
physica status solidi (a). 181:515-527
This study addresses the important influence of air thermal preannealings (500–1150 °C) on the emissions of Eu2+ and Eu3+ ions in CaSO4 samples doped with various Eu concentrations (10–2000 ppm) and synthesized under oxidizing conditions. The ch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eff5496da59be576ec41d0aea64e5f99
https://doi.org/10.1002/1521-396x(200010)181:2<515::aid-pssa515>3.0.co
https://doi.org/10.1002/1521-396x(200010)181:2<515::aid-pssa515>3.0.co
Autor:
Dominique Lapraz, Daniel Ohnenstetter, Fabien Cesbron, Alain Baumer, Gérard Panczer, H. Prevost, Philippe Blanc
Publikováno v:
Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science. 329:629-635
Comparative study of luminescence properties of doped synthetic minerals (anhydrite, calcite, fluorite and zircon) by cathodoluminescence and fluorescence methods is presented. The Eu 3+ doped minerals (anhydrite; other sulfates; fluorite) exhibit pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96326037fc0587ec61e3eaf1d71185c5
https://doi.org/10.1016/s1251-8050(00)87639-9
https://doi.org/10.1016/s1251-8050(00)87639-9
Publikováno v:
Chemical Geology. 138:73-80
In order to interpret cathodoluminescence (CL) spectra of natural anhydrites, synthetic crystals were indirectly obtained by precipitation of gypsum from solutions containing doping rare-earth elements (REE), and by transformation into anhydrite by d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2f29790164bf5945970a47c83182deb
https://doi.org/10.1016/s0009-2541(96)00175-1
https://doi.org/10.1016/s0009-2541(96)00175-1
Autor:
D. Goyet, Dominique Lapraz, V. Gérôme, Philibert Iacconi, Alain Baumer, H. Prevost, J. Gasiot
Publikováno v:
Physica Status Solidi (a). 153:239-247
A double origin of UV emissions in the thermostimulated luminescence (TSL) of CaSO4: DY is discussed: Tm traces and/or lattice emission (SO4 groups). Two types of crystals are compared: a commercial dosimetric powder and our synthesized samples. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64771134e907f82c3b3df8cd5e886d2e
https://doi.org/10.1002/pssa.2211530124
https://doi.org/10.1002/pssa.2211530124
Publikováno v:
Thermochimica Acta. 221:255-262
Resume L'eau incluse est l'un des constituants des coraux fossiles. Nous avons mesure par thermogravimetrie, la part d'eau adsorbee et surtout le pourcentage d'eau incluse qui semble constant pour les coraux qui ne contiennent que de l'aragonite (1,7
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::496be4cc0f3f71cb459c0461a02af016
https://doi.org/10.1016/0040-6031(93)85070-p
https://doi.org/10.1016/0040-6031(93)85070-p
Autor:
Michel Bernat, Max Ganteaume, Christian Zahra, Dominique Lapraz, Jean-Emmanuel Bokilo, Philibert Iacconi, Alain Baumer
Publikováno v:
Thermochimica Acta. 170:121-137
The aragonite fossil corals exhibit an intense natural thermoluminescence between 300°C and 450°C. The transformation of this biogenic aragonite into calcite begins at 260°C and is completed around 450°C. It is accompanied by a rapid loss of wate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af259758bcb4d63d202af1c15428ce1e
https://doi.org/10.1016/0040-6031(90)80530-c
https://doi.org/10.1016/0040-6031(90)80530-c
Publikováno v:
European Journal of Mineralogy. 2:297-304
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c69e7c033e056f5a503087a649dba5f1
https://doi.org/10.1127/ejm/2/3/0297
https://doi.org/10.1127/ejm/2/3/0297
Autor:
Guy Rémond, Gérard Panczer, Alain Baumer, Fabien Cesbron, Phillipe Blanc, Daniel Ohnenstetter
Publikováno v:
Cathodoluminescence in Geosciences ISBN: 9783642085260
As the geochemical behavior of the rare earth elements (REE) is of increasing interest in geology (see the reviews edited by Lipin and McKay 1989 and Jones et al. 1996), the main REE minerals in most igneous, metamorphic and sedimentary rocks are now
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71b35a2a02a52f8c42f5515b98e5af72
https://doi.org/10.1007/978-3-662-04086-7_5
https://doi.org/10.1007/978-3-662-04086-7_5
Publikováno v:
Bulletin de Minéralogie. 108:15-20
Tungsten minerals scheelite CaWO4 and ferberite FeWO4 (or wolframite (Fe,Mn)WO4) are met in nature in different contexts. They may also form by the alteration of each other. We have studied this type of reaction experimentally, by reacting a solution
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4e90b39bc79b3d606a68841e7850554
https://doi.org/10.3406/bulmi.1985.7854
https://doi.org/10.3406/bulmi.1985.7854
Autor:
Dominique Lapraz, Alain Baumer
Publikováno v:
Physica Status Solidi (a). 68:309-319
The thermoluminescence (TL) properties of chloroapatite Ca5(PO4)3Cl, — the samples being either natural or obtained by hydrothermal method — are studied between 77 and 650 K after X- irradiation. TL peak temperatures are specific of crystal latti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c86706da2f7c93f1293838f5079d085d
https://doi.org/10.1002/pssa.2210680140
https://doi.org/10.1002/pssa.2210680140