Accession Number : AD0763728

Title :   Energy-Dispersive Analysis of X Rays Produced by Radioactive Sources.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Swick,William A. , III

Report Date : MAR 1973

Pagination or Media Count : 76

Abstract : A system for energy-dispersive analysis of x rays produced by radioactive sources was evaluated in the study. Fe55, Cd109, and Am241 were used to produce fluorescent characteristic x rays in a variety of samples. Methods of reducing matrix effects were investigated. Dilution techniques were used to eliminate matrix effects for concentrations below 0.001g/square cm. Diluted solutions of metal salts were evaporated to deposit samples of 10 to the -6th power to 0.01g which were irradiated to produce net count rate of K x rays vs weight curves for different elements. Samples of unknown composition were examined and the weights of the elements present in these samples were determined from the net count rate curves. Samples of atmospheric dust were found to contain elements such as zinc, gallium, bromine, lead, calcium, and strontium in microgram quantities. (Modified author abstract)

Descriptors :   (*X RAYS, RADIOACTIVE ISOTOPES), (*X RAY SPECTROSCOPY, FLUORESCENCE), IRON, CADMIUM, AMERICIUM, SAMPLING, COINCIDENCE COUNTING, X RAY SPECTRA, THESES

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE