Accession Number : AD0782006

Title :   Trace Analysis of Heavy Elements by X-Ray Energy Spectroscopy.

Descriptive Note : Master's thesis,

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

Personal Author(s) : DeYoung,Lance G.

Report Date : MAR 1974

Pagination or Media Count : 76

Abstract : Trace analysis of heavy elements (Th and U) in the microgram to nanogram range is explored by x-ray energy spectroscopy. A focusing cathode electron gun, in conjunction with a newly constructed scattering chamber, is used to produce characteristic K x rays from thin metal foils. Characteristic K x rays are then used to produce characteristic L x rays of Th and U. De-excitation energies are measured by an intrinsic germanium detector. Using Pd foil, a beam current of 300 micro A and electron energies of 28 keV, detection of Th was achieved at 6.35 x 10 to the minus 8th power g. The above method will be applied to quantitative (trace) analysis of heavy elements in environmental media. Sensitivity of this x-ray energy spectroscopy system is compared to a previous system. (Author)

Descriptors :   *X ray spectroscopy, *X ray apparatus, *Thorium, *Uranium, Trace elements, Heavy metals, Chemical analysis, Body fluids, Urine, Theses

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Environmental Health and Safety

Distribution Statement : APPROVED FOR PUBLIC RELEASE