Bose condensate in superfluid sup 4 He and momentum distributions by deep inelastic scattering

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:7163596

Silver, R N ^[1]; Sokol, P E ^[2]

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1. Los Alamos National Lab., NM (USA)
2. Pennsylvania State Univ., University Park, PA (USA). Dept. of Physics

There are several reasons for the high interest in the recent experimental and theoretical progress in understanding deep inelastic neutron scattering from liquid {sup 4}He: it tests the fundamental London hypothesis of a connection between superfluidity and Bose condensation; it provides a quantitative test of ab-initio calculational methods for all systems with strong correlations which are the focus of current quantum many-body research; and it establishes the range of validity of deep inelastic scattering as a method for measuring momentum distributions. In this paper we introduce the concepts of impulse approximation in more detail, we describe recent progress in the theory for final state corrections to the impulse approximation, we present quantitative predictions for neutron scattering experiments, we compare with recent high energy pulsed neutron source experiments on liquid {sup 4}He by P. Sokol and colleagues as well as other attempts to extract the Bose condensate fraction from the neutron scattering data, and we discuss the implications of this progress for future momentum distribution experiments in other systems such as liquid {sup 3}He and quasi-elastic electron nucleus scattering. 42 refs., 23 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: ANL; DOE/MA; NSF
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 7163596
• Report Number(s): LA-UR-90-539; CONF-8911150--2; ON: DE90007541
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BASIC INTERACTIONS
BOSE-EINSTEIN CONDENSATION
COHERENT SCATTERING
COLLISIONS
COMPTON EFFECT
DEEP INELASTIC SCATTERING
DIFFRACTION
DISTRIBUTION FUNCTIONS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTRON COLLISIONS
EVEN-EVEN NUCLEI
FINAL-STATE INTERACTIONS
FUNCTIONS
HELIUM 4
HELIUM ISOTOPES
IMPULSE APPROXIMATION
INELASTIC SCATTERING
INTERACTIONS
ISOTOPES
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LIGHT NUCLEI
MOMENTUM TRANSFER
MONTE CARLO METHOD
NEUTRON DIFFRACTION
NUCLEI
PARTICLE INTERACTIONS
SCATTERING
STABLE ISOTOPES
SUPERFLUIDITY
TEMPERATURE DEPENDENCE