Accession Number:

AD0767219

Title:

Feasibility of Using Conversion Electron Mossbauer Spectroscopy for Characterization of Surfaces and Thin Films,

Descriptive Note:

Corporate Author:

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

Personal Author(s):

Report Date:

1973-06-01

Pagination or Media Count:

84.0

Abstract:

Experimental techniques for the study of surfaces and thin films by the use of Mossbauer spectroscopy requires a detector that can isolate internal conversion electrons with energies of 7.3-keV or less. In addition, if the detector could energy-discriminate the electrons, changes occurring in a thin film, as the interface between the film and substrate is approached, could be observed. An electrostatic detector, employing parallel deflector plates and a channeltron electron multiplier, was designed and constructed for the purpose of obtaining Mossbauer spectra by detecting specific-energy electrons. Although the detector was capable of detecting the 7.3-keV, 5.6-keV, and 0.53-keV electrons emitted in the decay of a Co57 point source, attempts to obtain Mossbauer spectra were unsuccessful. A flowing-gas proportional counter, designed to detect internal conversion electrons, was used to obtain several Mossbauer spectra. Absorbers used for these spectra are discussed. Modified author abstract

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE