Accession Number : AD0664048

Title :   AN APPARATUS FOR THE MEASUREMENT OF THE MOSSBAUER EFFECT IN THIN FILMS.

Descriptive Note : Rept. for 1 Mar 64-1 Apr 65,

Corporate Author : AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Haury,Gerard L. ; Rutner,Emile

Report Date : NOV 1967

Pagination or Media Count : 29

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)

Descriptors :   (*MOSSBAUER EFFECT, MEASUREMENT), INSTRUMENTATION, RESONANCE ABSORPTION, IRON, COBALT, NUCLEAR MAGNETIC MOMENTS, SPECIFIC HEAT, MAGNETIC FIELDS, SPECTRUM SIGNATURES, INTERACTIONS, EXPERIMENTAL DESIGN, GAMMA RAYS, CALIBRATION, NUCLEAR ENERGY LEVELS, FILMS

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE