Characterisation and behaviour under irradiation of rare-earth doped powellite phases : application to the long term behaviour of nuclear waste matrixes
type: Dataset
description: This work deals with the behaviour under irradiation of a glass-ceramic made after heat treatment of a molybdenum rich R7/T7 type glass. Rare earth elements (Eu3+ and Nd3+) are used as surrogates of minor actinides and fission products as well as structural luminescent probes. We will focus on the behaviour of the crystalline phase which is a powellite type calcium molybdate that incorporated other elements including rare earth elements. In order to determine the crystalline-chemical properties of the powellite structure, Raman spectroscopy and photoluminescence analyses are led on natural powellite samples and synthetic ceramics with compositions from pure CaMoO4 to Ca0.76Sr0.1Na0.07Eu0.01La0.02Nd0.02Pr0.02MoO4, a model composition of the crystalline phase of the glass-ceramic. The analyses of synthetic samples irradiated with He, Ar and Pb ions compared to the behaviour of a natural powellite sample that contains uranium indicate that powellite resist strongly to irradiation and never reach the amorphous state.
landing page: https://theses.hal.science/tel-00707843
identifier: NNT: 2010LYO10154
keyword: analogues-naturels
keyword: ceramic
keyword: ceramique
keyword: dechets-nucleaires
keyword: glass
keyword: glass-ceramic
keyword: infoeu-reposemanticsdoctoralthesis
keyword: natural-analogs
keyword: nuclear-wastes
keyword: photoluminescence
keyword: physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother
keyword: powellite
keyword: raman-spectroscopy
keyword: spectroscopie-raman
keyword: theses
keyword: verre
keyword: vitroceramique
issued: 2026-05-15T18:40:39.716429
modified: 2026-05-15T18:40:39.716435
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Characterisation and behaviour under irradiation of rare-earth doped powellite phases : application to the long term behaviour of nuclear waste matrixes
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00707843
issued: 2026-05-15T18:40:39.720675
modified: 2026-05-15T18:40:39.680707