Results 161 to 170 of about 16,232 (191)

Standardization of 226Ra radionuclide solutions

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1996
Abstract 226 Ra reference solutions with radium masses ranging from 0.1 to 5000 ng have found numerous applications in solving a number of metrological problems in the field of environmental control, etc. Methods and equipment are described which are employed to calibrate 226 Ra solutions when certifying them as reference standards of the radium ...
N.I. Karmalitsyn, S.V. Sepman, I.A. Kharitonov   +2 more
openaire   +1 more source

The toxicity of 90Sr, 226Ra and 239Pu

Nature, 1976
Data now available on the risks of radiation-induced fatal cancer and hereditary disease and radionuclide metabolism suggest that limits on the rates of intake of 90Sr, 226Ra and 239Pu at work, presently recommended by the International Commission on Radiological Protection, might be in need of considerable revision one with another and with the limit ...
M C, Thorne, J, Vennart
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Thermal-neutron fission of 226Ra

Journal of Inorganic and Nuclear Chemistry, 1974
Abstract Thermal-neutron fission cross-section of 226 Ra was measured by fission track detectors (polycarbonate) and it was found that the cross-section was 4·7 mbarn which is more than ten times larger than the previously reported values. Fission-product yields were also investigated as a function of complementary fragment mass ratio by measuring ...
H. Nakahara, T. Ikeda, T. Hashimoto
openaire   +1 more source

226Ra targets for nuclear spectroscopy

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1985
Abstract The preparation of 226RaBr2 targets for use in tandem accelerator experiments is described. The behaviour of these targets in heavy ion beams is discussed and possibilities to reduce the intrinsic target radiation are demonstrated.
H.J. Maier, R. Grossmann
openaire   +1 more source

226Ra and210Pb in the Weddell Sea

Earth and Planetary Science Letters, 1980
Abstract 226Ra and210Pb were measured in sections and profiles collected in the Weddell Sea during the International Weddell Sea Oceanographic Expedition in 1973. The results can be correlated with the circulation and mixing schemes deduced from hydrographic observations.
Y. Chung, M.D. Applequist
openaire   +2 more sources

226Ra and 228Ra in Iowa Drinking Water

Health Physics, 1982
The University Hygienic Laboratory has been performing radiochemical analyses on drinking water in the state of Iowa for over 20 yr. Approximately one half of the 1250 community water supplies that exist in Iowa have been sampled roughly once every 3 yr for the past decade.
L B, Kriege, R M, Hahne
openaire   +2 more sources

Rapid determination of 226Ra in urine samples

Radiation Protection Dosimetry, 2012
A new radiochemical separation method has been developed for rapid analysis of (226)Ra in urine samples. In this method, radium is separated from urine matrix using cation and anion exchange column chromatography. A (224)Ra tracer is added, together with its parent in the (228)Th standard, for chemical recovery correction.
Xiongxin, Dai, Sheila, Kramer-Tremblay, Chunsheng, Li   +2 more
openaire   +2 more sources

226Ra leaching from fossil bones

Nuclear Instruments and Methods, 1978
Abstract 226Ra and 238U concentrations in fossil bones were measured. A marked disequilibrium between radium and its parent uranium was found. This is probably due to the leaching of radium from fossil bones. A special case of equilibrium between 238U-226Ra is described.
C. Papastefanou, Stef. Charalambous
openaire   +1 more source

226Ra in the Pacific Ocean

Earth and Planetary Science Letters, 1980
Abstract A total of 29 vertical Ra profiles has been measured from the Pacific as part of the GEOSECS program. These profiles are located on an east-west section along ∼30°N, and a north-south section, close to the western boundary of the major basins in the western Pacific.
Y. Chung, H. Craig
openaire   +1 more source

226Ra or 226Ra/Ba dating of Holocene volcanic rocks: application to Mt. Etna and Merapi volcanoes

Earth and Planetary Science Letters, 2005
This paper shows how 226Ra–230Th disequilibria can be used to date Holocene volcanic rocks from some well selected volcanoes. A systematic study of these disequilibria on historical or well-dated volcanic samples is indeed first required to test the applicability of this method. Two examples are described here to illustrate its potential.
M. Condomines, P.J. Gauthier, J.C. Tanguy, R. Gertisser, J.C. Thouret, P. Berthommier, G. Camus   +6 more
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