Zobrazeno 1 - 10
of 130
pro vyhledávání: '"R. Poledna"'
Autor:
C.J. da Silva, Mam Araujo, P.A.L. da Cruz, C.F. Arcanjo, Ricardo Tadeu Lopes, A. L. Ferreira Filho, José Ubiratan Delgado, R.W.R.V. Da Silva, R. Poledna
Publikováno v:
Applied Radiation and Isotopes. 134:340-350
The sum-peak method, an absolute measurement technique that uses coincidence counting and γ-ray spectrometry, was applied to activity standardization of 152Eu sources. The decay branch used was that of 152Sm, as it is almost entirely electron captur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70e98ac06b1a999c54a147aeb5498f48
https://doi.org/10.1016/j.apradiso.2017.09.041
https://doi.org/10.1016/j.apradiso.2017.09.041
Autor:
A. da S. Laranjeira, R. Poledna, Akira Iwahara, Paulo Alberto Lima da Cruz, C.J. da Silva, R.L. da Silva, M.T.F. de Araújo, A.R.L. dos Santos, J. dos S. Loureiro, R. dos S. Gomes
Publikováno v:
Applied Radiation and Isotopes. 134:316-320
From a commercial supplier a solution containing 134Cs has been standardized at National Laboratory for Ionizing Radiation Metrology (LNMRI) for the first time using three Liquid scintillation based measurement. These measurement methods are 4πβ-γ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79c11e128c24bfecb836453df2a16c59
https://doi.org/10.1016/j.apradiso.2017.10.025
https://doi.org/10.1016/j.apradiso.2017.10.025
Standardization of 106 Ru/Rh by live-timed anticoincidence counting and gamma emission determination
Publikováno v:
Applied Radiation and Isotopes. 122:37-40
The absolute activity standardization measurement system of radionuclide by live-timed anticoincidence counting was implemented at LNMRI in 2008 to reduce the effects of some correction factors on the determination of activity with coincidence counti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2cbd3a4757c625cecfe1b051e89e22c
https://doi.org/10.1016/j.apradiso.2017.01.007
https://doi.org/10.1016/j.apradiso.2017.01.007
Autor:
Akira Iwahara, R. Poledna, Carlos José da Silva, Estela Maria de Oliveira, Regio dos Santos Gomes, José Ubiratan Delgado, Paulo Alberto Lima da Cruz, Ricardo Tadeu Lopes
Publikováno v:
Brazilian Journal of Radiation Sciences. 7
A 68(Ge+Ga) commercial solution has been standardized in LNMRI in Brazil, by sum-peak method, in which a 3”x3” NaI(Tl) gamma-ray detector is positioned at the top of a well-type 5”x5” NaI(Tl) gamma-ray detector, resulting in a set up approxim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77edf88a8d0d49f6ac3d5bd622af9a45
https://doi.org/10.15392/bjrs.v7i3b.862
https://doi.org/10.15392/bjrs.v7i3b.862
Autor:
L.V. de Sá, R. Poledna, José Ubiratan Delgado, R.L. da Silva, A.E. de Oliveira, Akira Iwahara, C.J. da Silva, Rafael Figueiredo Pohlmann Simões, P.A.L. da Cruz
Publikováno v:
Applied Radiation and Isotopes. 170:109559
From a commercial supplier, three independent lots of an aqueous solution containing 223Ra in equilibrium with its deteriorating progeny were considered for standardization, by using live-time anticoincidence counting (LTAC) in the Laboratorio Nacion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a8d0e68a34927260478e3d957946ec0
https://doi.org/10.1016/j.apradiso.2020.109559
https://doi.org/10.1016/j.apradiso.2020.109559
Autor:
Akira Iwahara, R. Poledna, M.C.M. de Almeida, José Ubiratan Delgado, Antonio Eduardo de Oliveira, Luiz Tauhata, M. T. F. Araújo, C.J. da Silva, Ronaldo Lins da Silva, Ricardo Tadeu Lopes
Publikováno v:
Applied Radiation and Isotopes. 109:389-392
(123)I is widely used for radiodiagnostic procedures. It is produced by reaction of (124)Xe (p,2n) (123)Cs →(123)Xe →(123)I in cyclotrons. (121)Te and (125)I appear in a photon energy spectrum as impurities. An activity of (121)Te was calibrated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e60f54baa38c5f8a65b3a2aee962fe57
https://doi.org/10.1016/j.apradiso.2015.12.056
https://doi.org/10.1016/j.apradiso.2015.12.056
Autor:
R F P, Simões, C J, da Silva, R L, da Silva, L V, de Sá, R, Poledna, A E, de Oliveira, A, Iwahara, P A L, da Cruz, J U, Delgado
Publikováno v:
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. 170
From a commercial supplier, three independent lots of an aqueous solution containing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::882c92d6af595425360134e6123b2a21
https://pubmed.ncbi.nlm.nih.gov/33476941
https://pubmed.ncbi.nlm.nih.gov/33476941
Autor:
Carlos José da Silva, R. Poledna, Paulo Alberto Lima da Cruz, Lídia Vasconcellos de Sá, Rafael Figueiredo Pohlmann Simões, Ronaldo Lins da Silva
Publikováno v:
Brazilian Journal of Radiation Sciences. 6
The Radium-223 ( 223 Ra) has being used as a medicine for localized treatment of patients with osteoblastic metastasis originated by prostate cancer resistant of castration or hormone refractory. For a better treatment with this radionuclide, clinica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c6c53dcccf51237a587f12048cd81ec
https://doi.org/10.15392/bjrs.v6i1.353
https://doi.org/10.15392/bjrs.v6i1.353
Autor:
E V de Veras, R. Poledna, M.C.M. de Almeida, A.S. Laranjeira, M.T.F. de Araújo, G.R. dos Santos, R.L. da Silva, A.M.S. Braghirolli, Ricardo Tadeu Lopes, Juliana Delgado
Publikováno v:
Applied Radiation and Isotopes. 109:261-263
(124)I is a radionuclide used in the diagnosis of tumors. The National Health Agency requires identification and activity measurement of impurities. Using gamma spectrometry with an efficiency calibrated high-purity germanium detector, impurities (12
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12d102bebe66b2b1d38d550061f0e7e9
https://doi.org/10.1016/j.apradiso.2015.11.060
https://doi.org/10.1016/j.apradiso.2015.11.060
Autor:
Miriam Tainá Ferreira de Araújo, R. Poledna, Anderson Leiras, Eduardo Bonfim De Paula, José Ubiratan Delgado
Publikováno v:
Brazilian Journal of Radiation Sciences. 5
LNMRI has sought to develop a methodology for the identification and accurate detection of impurities emitting gamma radiation at the metrological level, aiming to meet the recommendations not only of the international pharmacopoeia, but also of CNEN
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9a63e01295a9d8bdbc88ed3bcc1719d
https://doi.org/10.15392/bjrs.v5i3.300
https://doi.org/10.15392/bjrs.v5i3.300