Published June 1973 | Version v1
Journal article Metadata-only

Multi-branch structure of the excitation spectra in liquid helium II

Creators

  • 1. Osaka Univ., Toyonaka (Japan). Coll. of General Education

Description

The multi-branch structure of the excitation spectra in liquid helium II is clarified on the basis of the formulae from which the phonon-roton spectrum has been successfully derived in previous papers. The existence of the flat spectrum and the broad free-atom spectrum revealed by Cowley and Woods is confirmed theoretically. The new excitation spectrum with energy 40 °K at momentum 1.13Å-1 which has recently been found by Woods, Svensson and Martel is derived and an excellent agreement with experiment is obtained.

Additional details

Identifiers

DOI
10.1143/ptp.49.1802;

Publishing Information

Journal Title
Progress of Theoretical Physics
Journal Volume
49
Journal Issue
6
Series
Progr. Theor. Phys. (Kyoto).
Journal Page Range
1802-1820
ISSN
0033-068X

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
5111212
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
BOGOLYUBOV TRANSFORMATION; ENERGY SPECTRA; EXCITATION; HELIUM II; INTERACTIONS; PHONONS; ROTONS; VARIATIONAL METHODS
Descriptors DEC
CANONICAL TRANSFORMATIONS; ENERGY-LEVEL TRANSITIONS; EVEN-EVEN NUCLEI; HELIUM ISOTOPES; HELIUM 4; ISOTOPES; LIGHT NUCLEI; NUCLEI; QUASI PARTICLES; SPECTRA; STABLE ISOTOPES

Optional Information

Notes
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