Search Results
You are looking at 1 - 3 of 3 items for
- Author or Editor: A. Kushelevsky x
- Refine by Access: All Content x
Abstract
Thermal neutron activation analysis technique was used in air pollution and aerosol elemental content and size distribution investigations. Air pollution samples were collected on Whatman 41 paper filters which were activated along with known quantities of standards in a flux of ∼1013 n·cm−2·s−1. The activity of the samples was measured with a 40 cm3 Ge(Li) detector and analyzed with the computer program JANE, which identified the isotopes and found their quantities by normalization with the standard measurement results. Correlation between the various elements, in particular those belonging to dust from the desert and those considered typical urban air pollution, is investigated.
Abstract
The resolution time of a Ge(Li) system measured from the photopeak and the self-coincidence photopeak was found to be energy dependent and thus complicating the correction for the self-coincidence interference.
Abstract
Studies intended to optimize the production of Na18F, in aqueous solution following irradiation of organic fluorine compounds with 14 MeV neutrons are described. The use of Szilard-Chamers conditions was chosen to enhance the yield of18F, given the low fluxes available and the inherently low cross section of the (n, 2n) reaction. Twenty five potential target compounds were tested. The most suitable one, both in terms of the cost of the target material and of the efficiency of production of water-soluble Na18F, was found to be perfluoro n-hexane. A simple production method for18F– is outlined.
