Results 211 to 220 of about 193,768 (263)

222Rn + 220Rn monitoring by alpha spectrometry

Radiation Protection Dosimetry, 2014
Controlled 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, V. Roca, SABBARESE, Carlo, M. Pugliese, M. Quarto, C. Mattone   +5 more
openaire   +3 more sources

Preparation and characterization of234U for mass spectrometry and alpha-spectrometry

Journal of Radioanalytical and Nuclear Chemistry, 1998
234U of high isotopic purity (>99 atom%) as well as of high radiochemical, purity was separated from aged238Pu prepared by neutron irradiation of237Np. Methodologies based on ion exchange and solvent extraction procedures were used to achieve high decontamination factor from238Pu owing to the very high α-specific activity of238Pu (2800 times) in ...
S. K. Aggarwal, P. M. Shah, M. K. Saxena
openaire   +1 more source

Electrodeposition of actinides for alpha-spectrometry

Journal of Radioanalytical and Nuclear Chemistry, 1999
The electrodeposition of the actinides U, Th, Pu, Am, and Cm on stainless steel disks was studied. A sodium hydrogen sulphate — sodium sulphate buffer 0.63M in total sulphate and a ratio sodium hydrogen sulphate to total sulphate ranging from 0.16 (pH 1.8) to 0.48 (pH 1.3) allows the quantitative electrodeposition of the given actinides.
S. Bajo, J. Eikenberg
openaire   +1 more source

Source preparation in alpha spectrometry

Nuclear Instruments and Methods in Physics Research, 1984
Abstract Techniques for the preparation of sources suitable for alpha spectrometric measurments are presented. The include vacuum sublimation, electrodeposition, self-deposition, direct evaporation, direct precipitation and the use of solvents and spreading agents.
A.E. Lally, K.M. Glover
openaire   +1 more source

Preparation of Sources for Alpha Spectrometry

ract, 1966
Summary A simple method is presented for the preparation of alpha sources to be analyzed by an alpha spectrometer equipped with a semi-conductor detector. The procedure consists of evaporating to dryness an aqueous solution of the alpha-emitter, redissolving the residue in situ with 0.1 Ν HNO3, precipitating with 3Ν NH4OH and drying. The
H. W. Kirby, J. J. Dauby
openaire   +1 more source

On the determination of radium by alpha-spectrometry

Journal of Radioanalytical and Nuclear Chemistry, 1997
In order to determine radium in environmental samples by α-spectrometry, the way in which some changes in the chromatographic conditions can affect the purification of the element on cation exchange columns from hydrochloric solutions have been studied.
M. T. Crespo, A. S. Jiménez
openaire   +1 more source

Determination of plutonium by alpha spectrometry

Journal of Radioanalytical and Nuclear Chemistry Articles, 1992
Determination of actinides in the environmental and bioassay samples is important in view of the following factors: increasing energy production by nuclear reactors; environmental contamination due to fallout from nuclear weapons testing and burn up of nuclear-powered satellites; the growing emphasis on the desirability of a cleaner environment; and ...
S. K. Aggarwal, M. K. Saxena, H. C. Jain
openaire   +1 more source

Thorium Isotopic Analysis by Alpha Spectrometry

Radiation Protection Dosimetry, 2001
The technique of alpha spectrometry is used to detect alpha particles and to determine their energy. In this way the technique is able to provide simultaneously quantitative information (i.e. the activity) and qualitative information (the identity) on any radionuclide that emits an alpha particle.
openaire   +2 more sources

Determination of 226Ra in urine samples by alpha spectrometry

Radiation Protection Dosimetry, 2007
A radiation protection system to assess the internal contamination of workers during decontamination activities in an abounded fertilizer industry in the region of Attika, Greece, has been implemented. This system concerns, among other radionuclides, 226Ra.
K, Kehagia, C, Potiriadis, S, Bratakos, V, Koukouliou, G, Drikos   +4 more
openaire   +2 more sources

Characterisation of nasal swab samples by alpha spectrometry

Radiation Protection Dosimetry, 2009
A positive nasal swab taken at a radiation emergency, when properly collected and analysed, is a good indication of a potential inhalation intake. It may be expected to be a useful method for early dose assessment in cases of accidental inhalation of an alpha emitter.
Kumiko, Fukutsu, Yuji, Yamada, Makoto, Akashi   +2 more
openaire   +2 more sources