Results 221 to 230 of about 195,193 (266)
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Liquid scintillation alpha spectrometry techniques
Nuclear Instruments and Methods in Physics Research, 1984Abstract Accurate, quantitative determinations of alpha emitting nuclides by conventional plate counting methods are difficult, because of sample self-absorption problems in counting and because of non-reproducible losses in conventional sample separation methods. Liquid scintillation alpha spectrometry offers an attractive alternative with no sample
John W. McKlveen, W.J. McDowell
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Health Physics, 1989
Alpha particle counting is based on the response of an electronic counting system to an incident alpha particle. Alpha spectrometry is used in our employee surveillance bioassay program to measure the concentration of isotopes of Am, Pu and U contained on sample source preparations. Nuclides of Am, Pu and U are separated from the sample matrix by anion
H M, Ide, W D, Moss, M A, Gautier
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Alpha particle counting is based on the response of an electronic counting system to an incident alpha particle. Alpha spectrometry is used in our employee surveillance bioassay program to measure the concentration of isotopes of Am, Pu and U contained on sample source preparations. Nuclides of Am, Pu and U are separated from the sample matrix by anion
H M, Ide, W D, Moss, M A, Gautier
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Determination of plutonium in environmental samples by AMS and alpha spectrometry
Applied Radiation and Isotopes, 2005Environmental samples from nuclear weapons test sites at the atolls of Mururoa and Fangataufa (French Polynesia, south Pacific) have been analyzed for their content of plutonium isotopes by applying the independent techniques of decay counting (Alpha Spectrometry) and accelerator mass spectrometry (AMS).
Hrnecek, Erich +2 more
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Alpha spectrometry in emergency preparedness
2020A study to assess the choice of science as a vocation and career, considering alpha spectrometry in emergency preparedness, was carried out. The development of a career or a vocation by any individual in the field of science could better be achieved through consolidated plan towards a goal.
Amoah, Peter Atta +2 more
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222Rn + 220Rn monitoring by alpha spectrometry
Radiation Protection Dosimetry, 2014Controlled 222Rn+220Rn mixed atmospheres have been realised introducing calibrated sources in a stainless steel chamber. An electrostatic alpha monitor internal to the chamber has been used for an accurate discrimination of alpha peaks due to the products of the two isotopes.
R. Buompane +5 more
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Determination of Uranium Isotopes by Chemical Stripping and Alpha-spectrometry
Health Physics, 1984We describe a new method of preparing thin sources for the determination of uranium isotopes by alpha-spectrometry. The sources are produced by extracting the uranium isotopes from 1 M HNO3-4M Al(NO3)3 aqueous solution with polymeric membranes containing trioctylphosphine oxide (TOPO).
I A, Sachett, A W, Nobrega, D C, Lauria
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Neptunium‐237 Determination in Depleted Uranium Ammunition by Alpha Spectrometry
Annali di Chimica, 2004It is well known that ammunition containing depleted uranium (DU) was used by NATO during the Balkan conflict. To evaluate the DU origin (natural uranium enrichment of or spent nuclear fuel reprocessing) it is necessary to check the presence of activation products (236U, 239Pu, 240Pu, 241Am and 237Np, etc.) in the ammunition.
DESIDERI, DONATELLA +2 more
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Direct Alpha Spectrometry of Irradiated Nuclear Fuel
2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2017Alpha-particle spectrometry was performed on irradiated nuclear fuel using a single-crystal (sc) diamond semiconductor particle detector. The detector was manufactured using chemical vapor deposition (CVD) methods, square in shape measuring 4.6-mm per side, and 0.5-mm thick.
David L. Chichester +2 more
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Rapid determination of radium isotopes by alpha spectrometry
Journal of Radioanalytical and Nuclear Chemistry Articles, 1995An efficient analytical method for the determination of low-levels of226Ra and224Ra by alpha spectrometry is described. A cation exchange column was used to separate the analyte from other constituents in the sample (1–50 mL). After preconcentration and separation, the radium was electrodeposited onto a stainless steel disc from a solution of ammonium ...
J. S. Alvarado +2 more
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Determination of plutonium in the presence of uranium by alpha-spectrometry
Journal of Radioanalytical Chemistry, 1976The plutonium determination by alpha-particle spectrometry with semiconductor detectors in the presence of uranium has been described. It has been found that plutonium as well as uranium can be electrodeposited quantitatively on nickel or stainless steel discs from solutions in isopropanol. The time of deposition does not exceed 35–40 min.
G. Kuc, J. Parus, J. Kierzek
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