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Title: MOMENTUM DISTRIBUTION AND EXCITATION SPECTRUM OF LIQUID HELIUM

Abstract

The consistency of recent experimental and theoretical analyses of liquid He/sup 4/ was investigated. Further evidence was found for a strong depletion of the zero momentum state. The modifications of a Brueckner-Sawada type approximation implied by this depletion as well as by the existence of a net attraction of the helium atoms are discussed. It was found that a single particle model which does not allow for a sufficient width in the single particle spectral function is incapable of giving the observed excitation spectrum as well as the binding energy of liquid He. Better results were obtained with a single particle model which uses Feynman's energies k/sup 2//2ms(k) instead of the peak energy in neutron scattering. (auth)

Authors:
;
Publication Date:
Research Org.:
Univ. of California, La Jolla
Sponsoring Org.:
USDOE
OSTI Identifier:
4669530
NSA Number:
NSA-17-033941
Resource Type:
Journal Article
Journal Name:
Z. Physik.
Additional Journal Information:
Journal Volume: Vol: 175; Other Information: Orig. Receipt Date: 31-DEC-63
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
CHEMISTRY; ATOMIC MODELS; ATOMS; BINDING ENERGY; DISTRIBUTION; ENERGY; ENERGY LEVELS; EQUATIONS; EXCITATION; HELIUM; HELIUM 4; LIQUIDS; LOW TEMPERATURE; MOMENTUM; NEUTRON BEAMS; SCATTERING; SPECTROSCOPY

Citation Formats

Brenig, W, and Parry, W E. MOMENTUM DISTRIBUTION AND EXCITATION SPECTRUM OF LIQUID HELIUM. Country unknown/Code not available: N. p., 1963. Web. doi:10.1007/BF01375394.
Brenig, W, & Parry, W E. MOMENTUM DISTRIBUTION AND EXCITATION SPECTRUM OF LIQUID HELIUM. Country unknown/Code not available. doi:10.1007/BF01375394.
Brenig, W, and Parry, W E. Tue . "MOMENTUM DISTRIBUTION AND EXCITATION SPECTRUM OF LIQUID HELIUM". Country unknown/Code not available. doi:10.1007/BF01375394.
@article{osti_4669530,
title = {MOMENTUM DISTRIBUTION AND EXCITATION SPECTRUM OF LIQUID HELIUM},
author = {Brenig, W and Parry, W E},
abstractNote = {The consistency of recent experimental and theoretical analyses of liquid He/sup 4/ was investigated. Further evidence was found for a strong depletion of the zero momentum state. The modifications of a Brueckner-Sawada type approximation implied by this depletion as well as by the existence of a net attraction of the helium atoms are discussed. It was found that a single particle model which does not allow for a sufficient width in the single particle spectral function is incapable of giving the observed excitation spectrum as well as the binding energy of liquid He. Better results were obtained with a single particle model which uses Feynman's energies k/sup 2//2ms(k) instead of the peak energy in neutron scattering. (auth)},
doi = {10.1007/BF01375394},
journal = {Z. Physik.},
number = ,
volume = Vol: 175,
place = {Country unknown/Code not available},
year = {1963},
month = {1}
}