On the Raman Scattering in Liquid Helium

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概要

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• General treatment is given on the final state interaction between a pair of elementary excitations produced by the Raman scattering on liquid helium. The final state interaction exerts a drastic influence on the Raman spectrum where the produced excitations have small group velocities, i.e. the excitations lie near the extremum points of the phonon-roton dispersion curve. It is shown that, in general, the Raman spectrum has no peaks at these points in spite of the infinite density of states, and correct form of the spectrum is given. The result is interpreted as a destructive interference between excitations with positive and with negative group velocities. Possible existence of a resonance, which depends on the sign of the interaction between the excitations around the extrema, is also investigated.

• 理論物理学刊行会の論文
• 1970-11-25

著者

• Iwamoto Fumiaki

  Institute Of Physics College Of Arts And Sciences University Of Tokyo

関連論文

• A Note on the Raman Scattering from Liquid HeII
• Theory of Solid Helium
• Roton-Roton Scattering at Large Total Momentum
• On the Two-Branch Structure of the Excitation Spectra in Liquid Helium
• On the Raman Scattering in Liquid Helium
• Inclusion of Hole Motions in Brueckner Theory
• Application of the 5-Dimensional Spin to the Theory of Superfluid ^3He
• Improved Number Conserving Treatment for a Nuclear Pairing Model
• Perturbation Expansion of the Ground State Energy of Solid Helium

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