Search Results - "Duplâtre, G."

Positronium as a probe in natural polymers: decomposition in starch by Roudaut, G, Duplâtre, G

“…Ortho-positronium (o-Ps) is used as a probe in positron annihilation lifetime spectroscopy (PALS) experiments, to characterise the behaviour of free volumes in…”
Get more information

Track Effects in Positronium Formation by Stepanov, S.V., Byakov, V.M., Duplâtre, G., Stepanov, P.S., Bokov, A.V.

Get full text

Current Problems and Unknowns in Positronium Dynamics by Duplâtre, G.

Get full text

Positrons and Positronium Atoms in a Condensed Phase Close to Its Melting Point by Stepanov, S.V., Zvezhinskiy, D.S., Byakov, V.M., Duplâtre, G., Stepanov, P.S.

Get full text

Formation of Quasi-Free and Bubble Positronium States in Water and Aqueous Solutions by Stepanov, S.V., Duplâtre, G., Byakov, V.M., Zvezhinskiy, D.S., Subrahmanyam, V.S.

Get full text

Electron beam and gamma irradiation effects on high density polyethylene studied via positron annihilation lifetime spectroscopy by Badia, A., Duplâtre, G.

“…Positron annihilation lifetime spectroscopy is applied to the study of electron beam and gamma irradiation effects on high density polyethylene (HDPE). The…”
Get full text

On the peculiarities of positron annihilation features in silicalite-1 and Y-zeolites by Kajcsos, Zs, Duplâtre, G, Liszkay, L, Billard, I, Bonnenfant, A, Azenha, E, Lázár, K, Pál-Borbély, G, Caullet, P, Patarin, J, Lohonyai, L

“…Conditions that facilitate high Ps formation and interactions that modify the o-Ps lifetime were investigated by positron annihilation techniques in…”
Get full text

SOLVENT EXTRACTION OF URANIUM(VI) AND THORIUM(IV) WITH A TETRA-CARBOXYLATED CALIX[4]ARENE AND EFFECT OF ALKALI IONS (Na+, K+) by Montavon, G., Duplâtre, G., Asfari, Z., Vicens, J.

“…The solvent extraction of uranium(VI) and thorium(IV) with a tetra-carboxylated calix[4]arene (LH 4 ) in chloroform has been studied in the presence or absence…”
Get full text

Effect of water-soluble electron scavengers on positronium formation in AOT/water/isooctane microemulsions by Subrahmanyam, V.S., Ferreira Marques, M.F., Duplâtre, G.

“…In a previous work reporting on positron annihilation lifetime spectroscopy (LS) measurements in AOT/water/isooctane microemulsions, a model was established…”
Get full text

Competitive positron and positronium trapping in porous media by Kajcsos, Zs, Liszkay, L., Duplâtre, G., Lázár, K., Lohonyai, L., Varga, L., Gordo, P.M., de Lima, A.P., Lopes de Gil, C., Ferreira Marques, M.F., Bosnar, D., Bosnar, S., Kosanovic, C., Subotic, B.

“…Positron annihilation acquired acceptance for structural investigation of solids but results in porous media—where positron lifetime spectroscopy (LT) reveals…”
Get full text

Synthesis and characterization of antimony mixed-valence compounds in view of solid state isotopic exchange studies by Fernandez-Valverde, S., Ordońez-Regil, E., Bosch, P., Duplâtre, G.

Get full text

Improved tungsten moderator structures for slow positron beams by Liszkay, L, Kajcsos, Zs, Barthe, M.-F, Henry, L, Duplâtre, G, Nagy, A

“…Tungsten filaments from commercial incandescent light bulbs have been tested as slow positron moderators. The filaments were annealed by electric current in…”
Get full text

Micellar Radii and High Aggregation Numbers in a 0.6 M NaCl Sodium Dodecylsulfate Solution Determined through Positron Annihilation Lifetime Spectroscopy by Messaoud, Taoufik, Duplâtre, Gilles, Michels, Bernard, Waton, Gilles

“…The equations related to a recently published method to measure both the micellar average radius (R mic) and aggregation number (N ag) using a single…”
Get full text

Positron and positronium in porous media: zeolites by Kajcsos, Zs, Liszkay, L, Duplâtre, G, Lohonyai, L, Varga, L, Lázár, K, Pál-Borbély, G, Beyer, H.K, Caullet, P, Patarin, J, Lima, A.P.de, Gil, C.Lopes, Gordo, P.M, Marques, M.F.Ferreira

“…Correlations between positronium (Ps) production features and positron annihilation (PA) parameters were investigated in various zeolite samples (MFI,…”
Get full text

Solvent and temperature effects on positronium annihilation parameters and on its quenching reactions with the free radical HTEMPO by Magalh es, W. F., Abb, J. C., Dupl tre, G.

Get full text

Size of sodium dodecyl sulphate micelles in aqueous NaCl solutions as studied by positron annihilation lifetime spectroscopy by Bockstahl, Frédéric, Pachoud, Eric, Duplâtre, Gilles, Billard, Isabelle

“…The changes in size and shape of the micelles formed by 0.28 M sodium dodecyl sulphate in aqueous solution are studied as a function of added sodium chloride…”
Get full text

Ion association studies in aqueous NiSO4 solutions by positron lifetime spectroscopy by Duplâtre, G., Haessler, A., Netto, A. Marques

Get full text

Solvent extraction of alkaline-earth ions by dicarboxylated calix[4]arenes by Barakat, N., Burgard, M., Asfari, Z., Vicens, J., Montavon, G., Duplâtre, G.

“…The extraction of the alkaline-earth metal ions by 25,27-dicarboxymethyl-26,28-dimethoxy-5,11,17,23-tetra- tert-butylcalix [4]arene(L IH 2) and…”
Get full text

Surface charges and Np(V) sorption on amorphous Al and Fe silicates by Del Nero, Mirella, Assada, Aminou, Madé, Benoit, Barillon, Rémi, Duplâtre, Gilles

“…Sorption onto Si-rich alteration layers of crystalline minerals and nuclear glasses, and onto amorphous secondary silicates of rocks and soils, are expected to…”
Get full text

Behaviour of Pluronic P84 block copolymer micelles above the gelification temperature as probed by positron annihilation lifetime spectroscopy by Messaoud, Taoufik, Duplâtre, Gilles, Waton, Gilles, Michels, Bernard

“…The new method based on positron annihilation lifetime spectroscopy (PALS) to determine both the mean core radius, R(core), and aggregation number, N(ag), of…”
Get more information