Debye-Waller factors of the light actinide metals

Conference · Fri Oct 01 00:00:00 EDT 1993

OSTI ID:10103448

Lawson, A C; Goldstone, J A; Cort, B; Sheldon, R I; Foltyn, E M

Time-of-flight neutron powder diffraction was used to determine the Debve-Waller factors of light actinide metals. The Debye-Waller factor is a measure of the mean-square atomic displacement that arises from the thermal motion ofthe atoms in any solid. Its temperature dependence determines a Debye-Waller temperature, {Theta}{sub DW}, that is characteristic of the elastic properties of the solid. The data are obtained by Rietveld analysis of neutron diffraction powder patterns obtained at several temperatures. Results are presented for {alpha}-U, {alpha}-Np, {alpha}-Pu and {delta}-Pu{sub 0.95}Al{sub 0.05}. The {Theta}{sub DW}`s are temperature dependent, and anharmonic interatomic forces seem to be required to explain the results.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36; W-31109-ENG-38
• OSTI ID: 10103448
• Report Number(s): LA-UR-93-3463; CONF-930905-9; CONF-940221-1; ON: DE94000685; TRN: 94:000024
• Resource Relation: Conference: Actinides `93,Santa Fe, NM (United States); San Francisco, CA (United States),19-24 Sep 1993; 27 Feb - 3 Mar 1994; Other Information: PBD: [1993]
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
36 MATERIALS SCIENCE
URANIUM-ALPHA
DEBYE-WALLER FACTOR
NEPTUNIUM-ALPHA
PLUTONIUM
PLUTONIUM-DELTA
ALUMINIUM ADDITIONS
NEUTRON DIFFRACTION
TEMPERATURE DEPENDENCE
400702
050700
360104
PROPERTIES OF RADIOACTIVE MATERIALS
FUELS PRODUCTION AND PROPERTIES
PHYSICAL PROPERTIES