EMISSION, ABSORPTION AND REABSORPTION OF $gamma$-QUANTA BY IMPURITY NUCLEI PRESENT IN A SOLID SOLUTION

Journal Article · Sat Jul 01 04:00:00 EDT 1961 · Izvest. Akad. Nauk. S.S.S.R., Ser. Fiz.

OSTI ID:4842204

Dzyub, I P; Lubchenko, A F

It was shown mathematically that at high temperatures the absorption and emission curves for an impurity in solid solution have the form of a Gaussian curve with a superimposed Mossbauer line. On an energy plot the Mossbauer line is to the right of the maximum of the phonon part of the emission spectrum, and to the left of the maximum of the phonon part of the absorption spectrum. With decreasing temperature the phonon part of the spectrum becomes asymmetrical with the emission falling off more rapidly at higher energies than at lower energies from the maximum (with absorption the situation is reversed). It was shown mathematically that the intensity of the Mossbauer line increases exponentially with decreasing temperature for those temperatures at which h omega /sub s/(max) < theta , where omega /sub s/ refers to the maximum frequency of the system. The temperatare shift in the position of the Mossbauer line is determined by a factor alpha approx equal (10/sup -4/ to 10/sup -7/ sec/sup -1/ deg/sup / - >s/sup 1/) T. High frequencies of the lattice emerge as a criterion for the appearance of a Mossbauer line in the spectrum. The position and intensity of the Mossbauer line are discussed in terms of an adiabatic approximation with the evolution of a large amount of heat and of a small amount of heat. The shape of the Mossbauer line can also vary as a function of the position of the impurity nuclei in the solid solution. (TTT)

• Research Organization: Inst. of Physics, Academy of Sciences, USSR
• NSA Number: NSA-15-029778
• OSTI ID: 4842204
• Journal Information: Izvest. Akad. Nauk. S.S.S.R., Ser. Fiz., Journal Name: Izvest. Akad. Nauk. S.S.S.R., Ser. Fiz. Vol. Vol: 25
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ABSORPTION
CONFIGURATION
EMISSION
ENERGY
FREQUENCY
GAMMA RADIATION
HEAT TRANSFER
HIGH TEMPERATURE
IMPURITIES
LATTICES
MATHEMATICS
METALS, CERAMICS, AND OTHER MATERIALS
MOESSBAUER EFFECT
NUCLEI
QUANTUM MECHANICS
SOLID SOLUTIONS
SPECTRA
TEMPERATURE
THERMAL RADIATION