Results 171 to 180 of about 17,459 (196)
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210Pb Fluxes in Acidified Lakes
1986The acidification of softwater lakes by atmospheric deposition of strong acids has occurred in several regions of the world; however, the rate of acidification of freshwater systems is generally unknown. We have tested the hypothesis that the 210Pb technique can be used to establish the chronologies of sediments in acidified lakes, with the purpose of ...
P. J. Dillon, P. J. Scholer, H. E. Evans
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Determination of 210Pb in environmental samples
Journal of Radioanalytical and Nuclear Chemistry, 2006Measurement of 210Pb has gained a highly scientific attention due to its wide range of environmental applications. The most commonly used analytical techniques: gamma-spectrometry, beta-counting and alpha-spectrometry were used to measure environmental samples (geological, soil, sediment). Our paper is aiming at comparing the capabilities and limits of
Y. Y. Ebaid, A. E. M. Khater
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Journal of Radioanalytical and Nuclear Chemistry, 2019
Lead-210 is a useful tracer in environmental studies for a wide range of applications, particularly in atmospheric research and geochronology. Liquid scintillation counting (LSC) is a commonly used measurement method for 210Pb analysis. In the present work, to increase detection efficiency, an improved LSC technique for 210Pb determination was ...
Eunhwa Kwon +2 more
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Lead-210 is a useful tracer in environmental studies for a wide range of applications, particularly in atmospheric research and geochronology. Liquid scintillation counting (LSC) is a commonly used measurement method for 210Pb analysis. In the present work, to increase detection efficiency, an improved LSC technique for 210Pb determination was ...
Eunhwa Kwon +2 more
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Synthesis of [210Pb] (CH3)3 PbCl
International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1988Abstract Methods have been developed for the electrodeposition of 210 Pb 2+ on a copper coil and the subsequent use of this coated coil as a sacrificial cathode for an electrochemical reduction in the presence of excess methyl iodide. Labelled tetramethyllead was isolated by extraction (85% recovery), converted to [ 210 Pb](CH 3 ) 3 PbCl by ...
Jean Simon Blais, William D. Marshall
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210Pb–226Ra disequilibria in volcanic rocks
Earth and Planetary Science Letters, 2010Abstract Isotopes of the U-decay series, such as 238U–230Th–226Ra, have been used successfully to study timescales of magmatic processes. This study provides an overview of a shorter lived isotope pair, 210Pb–226Ra, which allows study of processes occuring during a crucial time window for magma ascent and eruption.
Kim Berlo, Simon Turner
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Initial Study of 210Pb in Indoor Air
Health Physics, 1993An exploratory program was undertaken to determine the feasibility of measuring the indoor air concentration of 210Pb. Low flow rate pumps and membrane filters were used to collect samples in an office. The air filter samples were stored for 1.6 y and 210Po was chemically separated and measured by alpha spectrometry.
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210Po AND 210Pb INHALATION BY CIGARETTE SMOKING IN ITALY
Health Physics, 2007210Po and its precursor 210Pb in cigarette smoke contribute a significant radiation dose to the lungs of smokers. In this work, the concentration of 210Po was determined in 17 of the most frequently smoked cigarette brands in Italy. Samples of tobacco, fresh filters, ash, and post-smoking filters were analyzed; 210Po was determined by alpha ...
DESIDERI, DONATELLA +3 more
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Nuclear Physics A, 1971
Abstract The 210 Pb(t, p) 212 Pb reaction has been carried out with 20 MeV tritons at a number of angles. The resulting energy level diagram for 212 Pb is remarkably similar to 210 Pb permitting tentative J π assignments. The excitation strengths to the lower levels agree well with a simple pairing vibration model.
C. Ellegaard, P.D. Barnes, E.R. Flynn
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Abstract The 210 Pb(t, p) 212 Pb reaction has been carried out with 20 MeV tritons at a number of angles. The resulting energy level diagram for 212 Pb is remarkably similar to 210 Pb permitting tentative J π assignments. The excitation strengths to the lower levels agree well with a simple pairing vibration model.
C. Ellegaard, P.D. Barnes, E.R. Flynn
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210Pb balance in Long Island Sound
Geochimica et Cosmochimica Acta, 1978Abstract A material balance is constructed for excess 210Pb (relative to 226Ra) as a test of the retentivity of Long Island Sound for a reactive heavy metal. Excess 210Pb is supplied to Long Island Sound chiefly by direct atmospheric deposition [1 ± 0.2(dis·min−1)cm−2·yr−1].
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A liquid-scintillation-based primary standardization of 210Pb
Applied Radiation and Isotopes, 2007A new radioactivity solution standard of 210Pb has been developed and will be disseminated by the National Institute of Standards and Technology (NIST) as standard reference material (SRM) 4337. This new 210Pb solution standard is contained in a 5 mL flame-sealed borosilicate glass ampoule, consists of (5.133+/-0.002)g of a nominal 1mol L(-1) nitric ...
Lizbeth, Laureano-Pérez +4 more
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