Momentum density of hcp /sup 4/He

Journal Article · Mon Mar 05 04:00:00 EST 1984 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.52.847· OSTI ID:6943555

Hilleke, R O; Chaddah, P; Simmons, R O; Price, D L; Sinha, S K

The momentum density of the quantum solid hcp /sup 4/He has been measured at 1.70 K at the molar volumes 18.20 and 19.45 cm/sup 3/. The measurements were made with pulsed incident neutrons of energy 505 meV, and with momentum transfers in the range of 12 to 22.5 A/sup -1/. The momentum density is obtained from the inelastic-scattering spectrum at each of eight scattering angles. The measured distribution is Gaussian and the derived kinetic energies are larger than proposed by existing theories.

• Research Organization: Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
• DOE Contract Number: AC02-76ER01198
• OSTI ID: 6943555
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 52:10; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
360603* -- Materials-- Properties
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DATA
DIFFRACTION
ENERGY
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FUNCTIONS
GAUSS FUNCTION
GROUND STATES
HCP LATTICES
HELIUM 4
HELIUM ISOTOPES
HEXAGONAL LATTICES
INELASTIC SCATTERING
INFORMATION
ISOTOPES
KINETIC ENERGY
LIGHT NUCLEI
MEV RANGE
MEV RANGE 100-1000
MOMENTUM TRANSFER
NEUTRON DIFFRACTION
NUCLEI
NUMERICAL DATA
PULSES
SCATTERING
STABLE ISOTOPES
STRUCTURE FACTORS
ULTRALOW TEMPERATURE