Abstract
The nuclear resonance photon scattering from the 6324 keV level of (Formula presented) in a single crystal of (Formula presented) and in a powder form were studied in detail. By measuring the scattering intensities at 80 K, with the nitrite planes of the single crystal aligned parallel and perpendicular to the photon beam, the largest anisotropy ever obtained in high-energy γ resonance scattering was observed. This was found to be caused mainly by the anisotropy in the zero-point motion of the internal modes of vibration of the (Formula presented) ion. The variation of the scattering intensity from a powdered isotopic (Formula presented) sample versus T in the range 12–297 K was also measured. The data were explained by accounting for the internal vibrational modes of the (Formula presented) ion and the lattice modes of the crystal taken from infrared and Raman results.
| Original language | English |
|---|---|
| Pages (from-to) | 6211-6216 |
| Number of pages | 6 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 59 |
| Issue number | 9 |
| DOIs | |
| State | Published - 1 Jan 1999 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics