Neutron studies of liquid and solid helium: Progress report, May 1, 1988--April 30, 1989

Technical Report · Sun Jan 01 04:00:00 EST 1989

OSTI ID:6606717

Glyde, H R

Liquid and solid helium are the prototype Fermi and Bose fluids and solids in nature. Understanding gained in these fundamental materials can be readily applied to more complicated materials of practical value. Neutron scattering studies at DOE supported National facilities and neutron sources abroad provide arguably the most incisive information on these fascinating materials. An improved microscopic model of Fermi liquids has been developed. The aim is to evaluate S(Q, ) more precisely in liquid THe at intermediate Q (3 /approx lt/ Q /approx lt/ 15 /angstrom//sup /minus/1/) for comparison with data taken at Oak Ridge and Argonne National Laboratory. The energy and lifetime of phonons in two dimensional monolayers of solid Ar on graphite have also been evaluated as a function of temperature. 6 figs.

• Research Organization: Delaware Univ., Newark (USA). Dept. of Physics and Astronomy
• DOE Contract Number: FG02-84ER45082
• OSTI ID: 6606717
• Report Number(s): DOE/ER/45082-4; ON: DE89006115
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COHERENT SCATTERING
DIFFRACTION
DOCUMENT TYPES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY DEPENDENCE
EVEN-EVEN NUCLEI
FLUIDS
HELIUM 4
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
LIQUIDS
MOMENTUM TRANSFER
NEUTRON DIFFRACTION
NUCLEI
PHONONS
PHYSICAL PROPERTIES
PROGRESS REPORT
QUANTUM FLUIDS
QUASI PARTICLES
SCATTERING
SOLIDS
STABLE ISOTOPES
STRUCTURE FACTORS
SUPERCONDUCTIVITY
SUPERFLUIDITY
TEMPERATURE DEPENDENCE