AN APPARATUS FOR THE MEASUREMENT OF THE MOSSBAUER EFFECT IN THIN FILMS.
Abstract
The purpose of the work was to examine a specific technique for obtaining Mossbauer spectra so that properties such as nuclear magnetic moments, specific heat, local magnetic field and Debye temperature could be determined for various materials. An apparatus was constructed for the measurement of the absorption coefficient for 14 Kev gamma rays by a thin film absorber containing iron 57. The coefficient is a function of the relative velocity between the thin film absorber and an emitter (Mossbauer effect). The velocity was produced by means of a linear mechanical drive; the gamma-ray transmission rate versus velocity was automatically recorded. The system was calibrated using a cobalt-57 source diffused into a pure iron disc which radiated to an absorber of pure iron. The absorber was 1.0-mil thick; the velocity of the absorber was varied from plus or minus 0.1 to plus or minus 10 mm/sec. Both emitter and absorber were at room temperature. A Mossbauer spectrum having the same characteristic as reported by others was obtained with the apparatus. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1967
- Accession Number
- AD0664048
Entities
People
- Emile Rutner
- Gerard L. Haury
Organizations
- Air Force Research Laboratory