AbstractAbstract
No abstract available
Source
International conference on Moessbauer spectroscopy; Portoroz, Yugoslavia; 10 - 14 Sep 1979; Published in summary form only.
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Journal Article
Literature Type
Conference
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Journal de Physique. Colloque; ISSN 0449-1947; 
; (no.C-1); p. 131-132
; (no.C-1); p. 131-132
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AbstractAbstract
No abstract available
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Journal Article
Journal
Physics Letters. A; v. 50(1); p. 20-22
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AbstractAbstract
[en] Two differential ionization chambers with very low background (+-10-16A) were developed to measure the lifetime variation of a radioactive isotope as a function of its physical and chemical state. It should be possible to measure effects of order 10-4
[fr]
On a mis au point deux chambres d'ionisation differentielles a tres faible bruit de fond (+-10-16A) pour mesurer des variations du taux de desintegration d'un isotope radioactif en fonction de son environnement physico-chimique. Des effets de l'ordre de 10-4 doivent pouvoir etre mesuresOriginal Title
Chambres d'ionisations differentielles pour la mesure de variation de periode radioactive
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Journal Article
Journal
Revue de Physique Appliquee; v. 11(1); p. 167-174
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AbstractAbstract
No abstract available
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International conference on the applications of the Moessbauer effect; Bendor, France; 02 Sep 1974
Record Type
Journal Article
Literature Type
Conference
Journal
J. Phys. (Paris), Colloq; (no.6); p. 301-303
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[en] The isomeric 124.8 keV (4-) level of 90Nb is known to decay by an almost entirely converted M2 transition of 2.38 + - 0.36 keV energy, to the 122.4 keV (6+) level. The 6+ level decays further by a prompt direct transition to the 8+ (Tsub(1/2) = 14.6 h) ground level of 90Nb. The half life of the isomeric state is about 19 s. Several authors have searched for possible 'chemical effects' on the decay rate of this isomeric state. A comparison of all available results seems to indicate that the decay constant of sup(90m)Nb in 4 different chemical environments (Zr and Hf lattices, ZrO and fluorine complex) are equal, but that for sup(90m)Nb in a Nb lattice and in Nb2O5, it is about 4% and 2% larger, respectively. However, these various results were obtained using very different experimental techniques, so the comparison is rather uncertain. The aim of the present experiment was to check this by measuring the decay rate of sup(90m)Nb nuclei implanted in various metallic foils, including Zr, Hf and Nb. (Auth.)
Source
International meeting on hyperfine interactions; Leuven, Belgium; 10 Sep 1975
Record Type
Journal Article
Literature Type
Conference
Journal
Hyperfine Interactions; v. 2(2); p. 419-420
Country of publication
BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, ELEMENTS, ENERGY-LEVEL TRANSITIONS, HOURS LIVING RADIOISOTOPES, INTERMEDIATE MASS NUCLEI, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, METALS, NIOBIUM ISOTOPES, NUCLEI, ODD-ODD NUCLEI, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES, TRANSITION ELEMENTS
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[en] The perturbation of the decay constant of sup(90m)Nb implanted in various transition metals (Zr, Nb, Hf, Ta, Ag and Au) has been determined by direct half-life measurements. Particular care was taken to evaluate and minimize possible systematic errors. The maximum relative change found is -(4.5 +- 0.8)%. (orig.)
[de]
Durch eine direkte Messung der Halbwertszeit wurde die Stoerung der sup(90m)Nb-Zerfallskonstanten nach Implantation in verschiedene Uebergangsmetalle (Zr, Nb, Hf, Ta, Ag und Au) untersucht. Besondere Sorgfalt wurde auf die Bestimmung und Minimierung moeglicher systematischer Fehler verwendet. Fuer die maximale relative Aenderung findet man -(4,5 +- 0,8)%. (orig.)Primary Subject
Source
5 figs.; 2 tabs.; 16 refs.
Record Type
Journal Article
Journal
Z. Phys., A; v. 284(4); p. 417-423
Country of publication
BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, ELEMENTS, ENERGY-LEVEL TRANSITIONS, HOURS LIVING RADIOISOTOPES, INTERMEDIATE MASS NUCLEI, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, METALS, MULTIPOLE TRANSITIONS, NIOBIUM ISOTOPES, NUCLEI, ODD-ODD NUCLEI, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES, SPECTRA, TRANSITION ELEMENTS
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AbstractAbstract
No abstract available
Source
International conference on the applications of the Moessbauer effect; Corfu, Greece; 13 - 17 Sep 1976; Published in abstract form only.
Record Type
Journal Article
Literature Type
Conference
Journal
J. Phys. (Paris), Colloq; (no.6); p. C6.707
Country of publication
BASIC INTERACTIONS, BETA DECAY, BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, DECAY, ELECTRON CAPTURE RADIOISOTOPES, EVEN-EVEN NUCLEI, HOURS LIVING RADIOISOTOPES, INTERACTIONS, INTERMEDIATE MASS NUCLEI, IRON ISOTOPES, ISOTOPES, LEPTONIC DECAY, NUCLEI, PARTICLE DECAY, RADIOISOTOPES, WEAK INTERACTIONS
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AbstractAbstract
[en] The 'Δlambda' variation occuring in the decay probability 'lambda' of 52Fe according to its physico-chemical state was investigated. The differential method of measurement with a ionization chamber was used for two 52Fe compounds with very different isomer shifts: the Fe2+ oxalate and Fe3+ oxide (Fe2O3). The corrected value obtained for Δ lambda/lambda with these two Fe2+ and Fe3+ compounds is 5.2+-0.4x10-4
[fr]
On a cherche a mesurer la variation 'Δ lambda' de la probabilite de desintegration 'lambda' de 52Fe, selon son etat physicochimique. On a utilise la methode de mesure differentielle par chambres d'ionisation, entre deux composes de 52Fe de deplacements isomeriques tres differents: l'oxalate de Fe2+ et l'oxyde de Fe3+ Fe2O3. La valeur corrigee de Δlambda/lambda obtenue entre les deux composes Fe2+ et Fe3+ est 5,2+-0,4x10-4Original Title
Mesure de variation de periode du 52Fe
Source
CEA Centre d'Etudes Nucleaires de Grenoble, 38 (France). Dept. de Recherche Fondamentale; p. 75-76; 1976
Record Type
Report
Literature Type
Progress Report
Report Number
Country of publication
BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, CARBOXYLIC ACID SALTS, CHALCOGENIDES, ELECTRON CAPTURE RADIOISOTOPES, EVEN-EVEN NUCLEI, HOURS LIVING RADIOISOTOPES, INTERMEDIATE MASS NUCLEI, IRON ISOTOPES, ISOTOPES, NUCLEI, OXIDES, OXYGEN COMPOUNDS, RADIOISOTOPES, TRANSITION ELEMENT COMPOUNDS
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[en] Electron densities at the nucleus are estimated from measurements of the change in electron capture rate of 52Fe in different iron compounds. This leads to a calibration constant α for the 57Fe isomer shift: α=-0.31+-0.04 a03.mm.s-1
Source
8. International conference on applications of the Moessbauer effect; Kyoto, Japan; 28 Aug - 1 Sep 1978
Record Type
Journal Article
Literature Type
Conference; Numerical Data
Journal
J. Phys. (Paris), Colloq; (no.2); p. C2.20-C2.22
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