EFFECT OF ANHARMONISM ON THE MOSSBAUER LINE INTENSITY

Journal Article · Sat Feb 01 04:00:00 EST 1964 · Zh. Eksperim. i Teor. Fiz.

OSTI ID:4049946

Krivoglaz, M A

The effect of anharmonism on the intensity of Mossbauer lines in the presence of local oscillations is considered. Even the taking into account of a weak anharmonism qualitatively changes the time dependence of the correlation function and results in the products of Bessel functions vanishing from the expression for the intensity. The corresponding intensity difference is found to be distributed around the Mossbauer line in a narrow band with a width approximates GAMMA /sub kappa / where GAMMA /sub kappa / is the level width of the local oscillation. The effect of anharmonism on the Debye -Waller factor is discussed. As a resuit of taking into account anharmonism, the dependence of the Mossbauer line intensity on temperature and wave vector is found to change and, in particular, an anisotropy of the Mossbauer effect in cubic crystals appears. Analogous effects may occur in solid solutions in the harmonic approximation. The effect of anharmonism on the single-phonon spectrum is considered. (auth)

• Research Organization: Inst. of Metal Physics, Academy of Sciences, Ukrainian SSR
• NSA Number: NSA-18-019123
• OSTI ID: 4049946
• Journal Information: Zh. Eksperim. i Teor. Fiz., Journal Name: Zh. Eksperim. i Teor. Fiz. Vol. Vol: 46
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ANISOTROPY
BESSEL FUNCTIONS
CRYSTALS
DEBYE-WALLER FACTOR
DIFFRACTION
ENERGY LEVELS
LATTICES
LEVELS
LIFETIME
MATHEMATICS
MOESSBAUER EFFECT
OSCILLATIONS
PHONONS
PHYSICS
SOLIDS
SOLUTIONS
SOUND
SPECTRA
TEMPERATURE
VECTORS
WIDTH
X RADIATION