Accession Number : AD0654044

Title :   MOSSBAUER SPECTRA AND EFFECTIVE FIELD PARAMETERS IN IRON COMPOUNDS,

Corporate Author : BOSTON UNIV MASS DEPT OF PHYSICS

Personal Author(s) : Hoy,Gilbert R. ; Chandra,Subhas

Report Date : MAR 1967

Pagination or Media Count : 215

Abstract : Mossbauer spectra were computed for the situation in which both static quadrupole and hyperfine interactions are present. The explicit calculations are restricted to the case when either the source or absorber is a 'single line' and the nuclear levels are the same as in the 57Fe 14.4 keV transition. Furthermore, the calculations apply only to powder samples. Cases are included in which the asymmetry parameter of the electric field gradient tensor (EFG) is non-zero and various possible directions of the internal effective magnetic field with respect to the EFG principal axes are allowed. The purpose of the report is to provide the means by which experimentalists, doing Mossbauer spectroscopy in ferrous compounds below their transition temperatures, can estimate the effective field parameters in their specimen. To that end a graphical representation is included as well as the explicit values for peak positions and intensities assuming various values of the effective field parameters. (Author)

Descriptors :   (*IRON COMPOUNDS, *MOSSBAUER EFFECT), (*NUCLEAR RADIATION SPECTROSCOPY, IRON COMPOUNDS), QUADRUPOLE MOMENT, HYPERFINE STRUCTURE, LINE SPECTRA, NUCLEAR ENERGY LEVELS, GAMMA EMISSION, ELECTRIC FIELDS, TABLES(DATA)

Subject Categories : Radiation and Nuclear Chemistry
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE