THE MOSSBAUER EFFECT IN TIN FROM 120 K TO THE MELTING POINT

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Proc. Phys. Soc. (London)

DOI:https://doi.org/10.1088/0370-1328/77/1/316· OSTI ID:4070011

Boyle, A J.F.; Bunbury, D St.P.; Edwards, C; Hall, H E

Measurements were made of the intensity of the recoilless resonance absorption of the 24-kev gamma ray from the decay of Sn/sup 119//sup m/ in metallic tin from 120 deg K to the melting point. Values of the Debye-Waller factor deduced from these results tended toward the values calculated for a Debye THETA of 142 deg K at low temperatures; the behavior of the DebyeWaller factor at higher temperatures indicated considerable anharmonicity of the lattice vibrations. Comparison with evidence from the thermal expansion and specific heat suggests that the quartic term in the interatomic potential is positive, and that the ratio of quartic to cubic terms is of the same order as the ratio of cubic to quadratic terms. In the last few degrees below the melting point the resonance absorption showed a rapid drop accompanied by an increase in line width. It is suggested that this effect is due to enhanced self-diffusion in the solid, and it is estimated that the diffusion coefficient reaches a value of 10/sup -8/ cm/sup 2/sec/sup -1/ about 0.6 deg K below the melting point. (auth)

• Research Organization: Univ. of Manchester, Eng.
• NSA Number: NSA-15-012216
• OSTI ID: 4070011
• Journal Information: Proc. Phys. Soc. (London), Journal Name: Proc. Phys. Soc. (London) Vol. Vol: 77
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ATOMS
DEBYE TEMPERATURE
DECAY
DIFFUSION
EFFICIENCY
ENERGY LEVELS
GAMMA RADIATION
GAMMA SOURCES
HIGH TEMPERATURE
INTERACTIONS
ISOMERS
LATTICES
LOW TEMPERATURE
MEASURED VALUES
MELTING POINTS
METALS
MOESSBAUER EFFECT
OSCILLATIONS
PHYSICS
RECOILS
RESONANCE
SOLIDS
SPECIFIC HEAT
SPECTRAL SHIFT
TEMPERATURE
TIN
TIN 119