MOMENTUM DISTRIBUTION AND EXCITATION SPECTRUM OF LIQUID HELIUM
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)
- Research Organization:
- Univ. of California, La Jolla
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-033941
- OSTI ID:
- 4669530
- Journal Information:
- Z. Physik., Vol. Vol: 175; Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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