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- Author or Editor: L. Pelekis x
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Abstract
The photoefficiency and source utilization coefficients for 3.5, 28 and 45 cm3 Ge(Li) detectors were determined. Values of the source utilization coefficient were obtained as a function of the measurement geometry. Limits of detection were determined for 30 elements with long-lived isotopes and 38 elements with short-lived isotopes.
Abstract
The character and values of corrections are discussed which are required in the application of monitors (in particular, copper monitors) for the activation analysis of copper, zinc and manganese in biological samples.
Abstract
The problem of neutron flux decrease during the activation of samples is discussed. Data by different authors on the weight of spherical samples corresponding to a flux decrease of 10% are reported. The self-shielding effect due to the presence of constituents with large absorption cross-sections is discussed.
Abstract
The total efficiency of γ-ray detection by Ge(Li) semiconductors is calculated for the energy range 0.1 to 10 MeV, for cylindrical detectors with radii from 0.25 cm to 2.5 cm and thicknesses from 0.1 cm to 1 cm, at distances between the source and detector ranging from 2 cm to 20 cm.
Abstract
The separation of elements by means of thiooxine is reviewed. The extraction ranges of the thiooxinates of manganese, iron, cobalt, copper, zinc and mercury, for metal contents of 10−7–10−9g, were determined using the radioactive tracer method. Solubility values in chloroform and distribution coefficients in the system chloroform-water were determined for mercury, zinc and iron thiooxinates. Polytetrafluoroethylene powder was used to eliminate chloroform traces from the aqueous phase.
