Results 151 to 160 of about 16,232 (191)

Determination of 226Ra Activity Using Gamma Spectrometry with 226Ra–222Rn Disequilibrium

Health Physics, 2015
Radium-226 (Ra) activity is normally determined indirectly by gamma spectrometry, in particular by measuring the characteristic γ-ray emitted from its progeny (Pb and Bi) when Ra-Rn secular equilibrium is reached. This article describes a measurement method involving the measurement of Pb ingrowth.
Qi, Li   +7 more
openaire   +2 more sources

226Ra, 228Ra and 228Ra/226Ra in surface marine sediment of Malaysia

Journal of Radioanalytical and Nuclear Chemistry, 2012
Surface sediment samples were collected at the West (east coast and west coast of Peninsular Malaysia) and East (Sabah and Sarawak) Malaysia in several expeditions within August 2003 until June 2008 for determining the level of natural radium isotopes.
Mei-Wo Yii, Zal Uyun Wan-Mahmood
openaire   +1 more source

Coulomb excitation of 226Ra

Nuclear Physics A, 1993
Abstract Radioactive targets of 226 Ra were Coulomb excited by 4 He projectiles (particle spectroscopy), and 16 O, 32 S and 208 Pb projectiles (particle-γ coincidences). The K = 0± rotational bands could be followed up to spin 18 + and 17 − , respectively.
H.J. Wollersheim   +11 more
openaire   +1 more source

Dissolution characteristics of 226Ra from phosphogypsum

Journal of Environmental Radioactivity, 2002
The paper presents the results of the dissolution characteristics of 226Ra from phosphogypsum, a by-product from phosphate fertilizer industries. Leachability of 226Ra in distilled water and rainwater have been examined under different leaching conditions such as contact time, solid:liquid ratio and simulating natural conditions.
P P, Haridasan   +3 more
openaire   +2 more sources

Quantifying 226Ra activity in a complex assemblage of 226Ra-bearing minerals using alpha autoradiography and SEM/EDS

Journal of Environmental Radioactivity, 2022
226Ra is an ultra-trace element with important environmental implications for many industries (including water treatment and oil and mineral extraction). Its extremely low concentrations in natural environments do not allow for direct observation and measurement of the 226Ra-bearing minerals governing 226Ra mobility.
Besançon, Clémence   +4 more
openaire   +4 more sources

226Ra determination by electrodeposition

Science of The Total Environment, 1988
Abstract Direct methods for the determination of 226 Ra in the environment are not very common. In general the activity of this radionuclide is calculated through the analysis of its daughter 222 Rn, or by observing the growth of α activity of an Ra sample.
R. Garcia-Tenorio, M. Garcia-Leon
openaire   +1 more source

Concentration of 226Ra in Human Teeth

Health Physics, 1994
226Ra concentrations in human teeth from several cities, mainly Tokyo, Japan, were determined with emphasis on the measurement of low-level 226Ra by alpha-ray spectrometry following chemical separation. No appreciable differences in 226Ra concentration were found among various permanent teeth samples of different age groups in Tokyo.
M, Yamamoto   +3 more
openaire   +2 more sources

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