Study of defects in solids. I. Chemical effects related to the (n,γ) reaction and electron capture. II. dehydration of Ba(ClO3)2,H2O
Description
The first part of this work concerns the Moessbauer effect study of two groups of phenomena: those related to the (n,γ) reaction and those connected with radioactive disintegration of 57Co by electron capture. Hf compounds were chosen for the first group, and a chemical study was also devoted to the effects of the (n,γ) reaction in organic complexes of Cr(III). Nuclear recoil and thermal annealing of these compounds were investigated. For the second group an attempt was made to show the effects of the environment on the chemical state of the 57Fe detected. In part two the Ba(ClO3)2,H2O dehydratation mechanism was examined by quadrupolar nuclear resonance. By this technique, combined with X-ray diffraction and Raman spectroscopy, the effects of dehydration on the characteristics of the quadrupolar interaction and on the crystal structure of the compound were demonstrated. A model of the dehydration process is proposed
Availability note (English)
MF available from INIS under the Report Number.Abstract (French)
Dans la premiere partie de ce travail, on a etudie par resonance gamma nucleaire deux groupes de phenomenes: ceux lies a la reaction (n,γ) et ceux se rattachant a la desintegration radioactive par capture electronique de 57Co. Pour le premier groupe, on a choisi les composes de Hf et on a egalement etudie, par voie chimique, les consequences de la reaction (n,γ) dans les complexes organiques de Cr(III). On s'est interesse au recul nucleaire et au recuit thermique de ces composes. Pour le deuxieme groupe, on a essaye de mettre en evidence les influence de l'environnement sur l'etat chimique du 57Fe detecte. Dans la deuxieme partie, on a examine le mecanisme de deshydratation de Ba(ClO3)2,H2O par resonance quadrupolaire necessaire. Cette technique associee a la diffraction des rayons X et a la spectroscopie Raman a permis de mettre en evidence les effets de la deshydratation sur les caracteristiques de l'interaction quadrupolaire et sur la structure cristalline du compose. Un modele du processus de deshydratation est proposeFiles
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Additional details
Additional titles
- Original title (French)
- Etude de defauts dans les solides. I. Effets chimiques associes a la reaction (n,γ) et a la capture electronique. II. Deshydratation du chlorate de baryum monohydrate
Publishing Information
- Imprint Pagination
- 146 p.
- Report number
- FRNC-TH--592
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 7241917
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- ANNEALING; CAPTURE; CHROMIUM COMPLEXES; CHROMIUM 51; HAFNIUM COMPOUNDS; HAFNIUM 180; HOT ATOM CHEMISTRY; MOESSBAUER EFFECT; NEUTRON REACTIONS; RECOILS; RETENTION
- Descriptors DEC
- BARYON REACTIONS; BETA DECAY RADIOISOTOPES; CHEMISTRY; CHROMIUM ISOTOPES; COMPLEXES; ELECTRON CAPTURE RADIOISOTOPES; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HADRON REACTIONS; HAFNIUM ISOTOPES; HEAT TREATMENTS; HOURS LIVING RADIOISOTOPES; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTO; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; RADIOCHEMISTRY; RADIOISOTOPES; STABLE ISOTOPES; TRANSITION ELEMENT COMPLEXES; TRANSITION ELEMENT COMPOUNDS