MEASUREMENT OF LATTICE VIBRATIONS IN VANADIUM BY NEUTRON SCATTERING

Journal Article · Sat Feb 15 04:00:00 EST 1958 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.109.1046· OSTI ID:4334890

Eisenhauer, C M; Pelah, I; Hughes, D J; Palevsky, H

The energy spectrum of slow neutrons inelastically scattered by vanadium metal has been measured by the time-of-flight technique. The neutrons gain energy by absorbing quanta of lattice vibration energy (phonons). As the nuclear scattering amplitude of vanadium is incoherent, the energy distribution of scattered neutrons is directly related to the frequency distribution of lattice vibrations. The measured neutron energy spectrum, as well as the derived frequency distribution, shows a clearly resolved double peak. This structure, which is distinctly different from the simple Debye distribution, but expected on the basis of detailed calculations, has heretofore not been amenable to direct measurement. The measured frequency distribution is compared with calculations for a bodycentered cubic lattice by the Born-von Karman theory and qualitative agreement is obtained. A more exact comparisom awaits measurement of the elastic constants of vanadium. (auth)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• NSA Number: NSA-12-006678
• OSTI ID: 4334890
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 109; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

DISTRIBUTION
ELASTICITY
ENERGY
FREQUENCY
LATTICES
MEASURED VALUES
NEUTRONS
OSCILLATIONS
PHYSICS
SCATTERING
SPECTRA
VANADIUM
VIBRATIONS