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Excitation spectrum and second virial in He II

โœ Scribed by M. Kumar; C.M. Kachhava


Publisher
Elsevier Science
Year
1980
Weight
492 KB
Volume
101
Category
Article
ISSN
0378-4363

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Threshold phenomena in the excitation sp
โœ L. P. Pitaevskii ๐Ÿ“‚ Article ๐Ÿ“… 1992 ๐Ÿ› Springer US ๐ŸŒ English โš– 286 KB

The elementary theory of threshold phenomena in the excitation spectrum of superfluid 4He is presented. The multiphonon threshold in the initial part of the spectrum and the two-roton threshold at energy 2A are discussed.