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Courrol, L.C.; Gomes, L.; Ranieri, I.M.
Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)1992
Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)1992
AbstractAbstract
[en] It has been established the model for the F+2:02- formation in LiF:OH- irradiated based on a statistical distribution of the defects produced during the electron irradiation at - 300C. These stabilized centers are formed during the thermal diffusion of the anionic vacancies in competition with the isolated F+2 centers. A critical distance of thirteen lattice parameters determined for the vacancy capture suggested that the 02- - α dipole is the precursor entity responsible for the F+2:02- creation. (author)
Source
1992; 14 p
Record Type
Miscellaneous
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AbstractAbstract
[en] The phase diagram of the system LiF-GdF3 has been revised, using differential thermal analysis (DTA). We observed a eutectic reaction at 25 mol% of GdF3 and 698 deg. C and a peritectic reaction at 34 mol% of GdF3 and 755 deg. C. We found indications for a GdF3 phase transformation from hexagonal to orthorhombic at 900 deg. C. An identification of the formed phases was made by X-ray diffraction and SEM
Primary Subject
Source
S0925838804002063; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
ALKALI METAL COMPOUNDS, COHERENT SCATTERING, DIAGRAMS, DIFFRACTION, ELECTRON MICROSCOPY, FLUORIDES, FLUORINE COMPOUNDS, GADOLINIUM COMPOUNDS, HALIDES, HALOGEN COMPOUNDS, INFORMATION, LITHIUM COMPOUNDS, LITHIUM HALIDES, MICROSCOPY, RARE EARTH COMPOUNDS, SCATTERING, TEMPERATURE RANGE, THERMAL ANALYSIS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
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Ranieri, I.M.; Cantagallo, M.I.C.; Vieira, M.M.F.; Iyer, S.S.S.; Morato, S.P.
Instituto de Pesquisas Energeticas e Nucleares, Sao Paulo, SP (Brazil)1989
Instituto de Pesquisas Energeticas e Nucleares, Sao Paulo, SP (Brazil)1989
AbstractAbstract
[en] Application of laser fluorimetry for the determination of trace levels of uranium in aqueous samples has been evaluated. The various parameters that may influence the sensitivity and accuracy of the method have been investigated. It was verified that the method is applicable to samples in the concentration range between 1 to 100 ppb U. The precision is 9% in the 1 ppb U level and 2% for 100 ppb. (author)
[pt]
Propoe-se no presente trabalho, a aplicacao da fluorimetria por laser na determinacao de tracos de uranio em solucoes aquosas. Investigaram-se diversos parametros experimentais que influenciam a precisao do metodo, e verificou-se que o metodo e aplicavel para amostras com concentracoes de 1 a 100 ppb U, com precisao de 9% no nivel de 1 ppb U, e 2% para 100 ppb U. (autor)Original Title
Avaliacao do metodo de fluorimetria por laser na determinacao de uranio
Primary Subject
Source
Feb 1989; 13 p
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Report
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AbstractAbstract
No abstract available
Source
31. Annual Meeting of the Brazilian Society for the Advancement of Science; Fortaleza, Brazil; 11 - 18 Jul 1979; Published in summary form only.
Record Type
Journal Article
Literature Type
Conference
Journal
Ciencia e Cultura; ISSN 0009-6725; 
; v. 31(7); p. 303
; v. 31(7); p. 303
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Source
32. Annual Meeting of the Brazilian Society for the Advancement of Science; Rio de Janeiro, Brazil; 6 - 12 Jul 1980; Published in summary form only.
Record Type
Journal Article
Literature Type
Conference
Journal
Ciencia e Cultura; ISSN 0009-6725; ; v. 32(7); p. 272-273
; v. 32(7); p. 272-273
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Courrol, L.C.; Gomes, L.; Ranieri, I.M.
Proceedings of the 4. State Symposium on Lasers and Uses - v.11990
Proceedings of the 4. State Symposium on Lasers and Uses - v.11990
AbstractAbstract
[en] A model for F sup(+) sub(2)-01 sup(2-) formation in irradiated LiF:OH, based on a statistical distribution of the defects produced during the electron irradiation at -30 sup(0)C, has been established. These stabilized centers are formed during the thermal diffusion of the anionic vacancies in competition with the isolated F sup(+) sub(2) centers. A critical distance of thirteen lattice parameters suggested that the O sup(2-) - α dipole is the precursor entity responsible for F sup(+) sub(2) -O sup(2-) creation. (author)
Source
Leite, N.F.; Schwab, C. (eds.); Centro Tecnico Aeroespacial, Sao Jose dos Campos, SP (Brazil). Inst. Tecnologico de Aeronautica; 217 p; 1990; p. 374-383; 4. State Symposium on Lasers and Uses; Sao Jose dos Campos, SP (Brazil); 8-10 Oct 1990; Available from the Library of Comissao Nacional de Energia Nuclear, RJ, Brazil
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AbstractAbstract
[en] A color center laser based on F center emission in LiF monocrystals doped with Mg and OH- was operated at room temperature. The Li monocrystals were grown under dry N2 atmosphere by a modified Czochralski technique and irradiated with 50 keV X-rays or 1 MeV electrons in order to produce F centers, F aggregates, and hole centers. F2 center action was observed at 690 nm with about 250 W of peak output power and 10 ns pulse width
Source
Short note.
Record Type
Journal Article
Journal
Physica Status Solidi. A, Applied Research; ISSN 0031-8965; ; v. 73(1); p. K115-K117
; v. 73(1); p. K115-K117
Country of publication
ALKALI METAL COMPOUNDS, ALKALINE EARTH METALS, AMPLIFIERS, BEAMS, CHARGED PARTICLES, COLOR CENTERS, CRYSTAL DEFECTS, CRYSTAL STRUCTURE, ELECTROMAGNETIC RADIATION, ELEMENTS, EQUIPMENT, FLUORIDES, FLUORINE COMPOUNDS, HALIDES, HALOGEN COMPOUNDS, HYDROGEN COMPOUNDS, IONIZING RADIATIONS, IONS, LASERS, LEPTON BEAMS, LITHIUM COMPOUNDS, LITHIUM HALIDES, MATERIALS, METALS, OXYGEN COMPOUNDS, PARTICLE BEAMS, POINT DEFECTS, RADIATION EFFECTS, RADIATIONS, VACANCIES
Reference NumberReference Number
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AbstractAbstract
No abstract available
Secondary Subject
Source
33. Annual Meeting of the Brazilian Society for the Advancement of Science; Salvador, Brazil; 8 - 15 Jul 1981; Published in summary form only.
Record Type
Journal Article
Literature Type
Conference
Journal
Cienc. Cult. (Sao Paulo) Supl; v. 33(7); p. 248
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Frey, B.Y.; Ferreira, V.; Ranieri, I.M.; Morato, S.P.
Proceedings of the 13. National Meeting on Condensed Matter1990
Proceedings of the 13. National Meeting on Condensed Matter1990
AbstractAbstract
[en] Published in summary form only
Original Title
Crescimento de cristais de KDP e ADP a partir da solucao aquosa
Source
Almeida Fonseca, A.L. de (Brasilia Univ., DF (Brazil)); Koiler, B. (Pontificia Univ. Catolica do Rio de Janeiro, RJ (Brazil)); Brescamsin, L.M. (Universidade Estadual de Campinas, SP (Brazil)) (and others); Sociedade Brasileira de Fisica, Rio de Janeiro, RJ (Brazil); 284 p; 1990; p. 61; 13. National Meeting on Condensed Matter Physics; Caxambu, MG (Brazil); 8-12 May 1990; Available from the Library of the Comissao Nacional de Energia Nuclear, RJ, Brazil
Record Type
Miscellaneous
Literature Type
Conference
Country of publication
LanguageLanguage
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Courrol, L.C.; Gomes, L.; Ranieri, I.M.; Morato, S.P.
Proceedings of the 13. National Meeting on Condensed Matter Physics1990
Proceedings of the 13. National Meeting on Condensed Matter Physics1990
AbstractAbstract
[en] Published in summary form only
Original Title
Estudo do processo de estabilizacao dos centros F sub(2) sup (+) em cristais de LiF:OH sup(-) irradiados
Source
Almeida Fonseca, A.L. de (Brasilia Univ., DF (Brazil)); Koiler, B. (Pontificia Univ. Catolica do Rio de Janeiro, RJ (Brazil)); Brescansin, L.M. (Universidade Estadual de Campinas, SP (Brazil)) (and others); Sociedade Brasileira de Fisica, Rio de Janeiro, RJ (Brazil); 284 p; 1990; p. 165; 13. National Meeting on Condensed Matter Physics; Caxambu, MG (Brazil); 8-12 May 1990; Available from the Library of Comissao Nacional de Energia Nuclear, RJ, Brazil
Record Type
Miscellaneous
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Conference
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