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The breakdown of superfluidity in liquid 4He : an experimental test of Landau's theory.

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The breakdown of superfluidity in liquid 4He : an experimental test of Landau's theory. / Allum, D. R.; McClintock, Peter V. E.; Phillips, A. et al.
In: Philosophical Transactions of the Royal Society of London A, Vol. 284, No. 1320, 04.01.1977, p. 179-224.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Allum, DR, McClintock, PVE, Phillips, A & Bowley, RM 1977, 'The breakdown of superfluidity in liquid 4He : an experimental test of Landau's theory.', Philosophical Transactions of the Royal Society of London A, vol. 284, no. 1320, pp. 179-224. https://doi.org/10.1098/rsta.1977.0008

APA

Allum, D. R., McClintock, P. V. E., Phillips, A., & Bowley, R. M. (1977). The breakdown of superfluidity in liquid 4He : an experimental test of Landau's theory. Philosophical Transactions of the Royal Society of London A, 284(1320), 179-224. https://doi.org/10.1098/rsta.1977.0008

Vancouver

Allum DR, McClintock PVE, Phillips A, Bowley RM. The breakdown of superfluidity in liquid 4He : an experimental test of Landau's theory. Philosophical Transactions of the Royal Society of London A. 1977 Jan 4;284(1320):179-224. doi: 10.1098/rsta.1977.0008

Author

Allum, D. R. ; McClintock, Peter V. E. ; Phillips, A. et al. / The breakdown of superfluidity in liquid 4He : an experimental test of Landau's theory. In: Philosophical Transactions of the Royal Society of London A. 1977 ; Vol. 284, No. 1320. pp. 179-224.

Bibtex

@article{789d7ce4d8ba4c0198a49945bca2e80a,
title = "The breakdown of superfluidity in liquid 4He : an experimental test of Landau's theory.",
abstract = "A single pulse time of flight technique has been used to determine the drift velocity v of the negative ions injected into liquid 4He from a field emission source. Measurements of v as a function of temperature T, pressure P and electric field E are presented within the range: 0.29 < T < 0.5 K; 21 x 10^5 < P < 25 x 10^5 Pa; 1 < E < 300 kV/m. The experimental results are in good agreement with Landau's theory of superfluidity. The data are used to demonstrate the inapplicability of two theories of super critical dissipation: by Takken, based on an assumption of coherent roton emission; and by Bowley and Sheard, based on the assumption of incoherent single-roton emission. The results are, however, shown to be in excellent agreement with Bowley and Sheard's incoherent two-roton theory, and the data are used to derive a numerical value of the matrix element. characterizing two-roton emission. The surprising absence of the single-roton emission process is discussed, and an upper bound is placed on the relevant matrix element.",
author = "Allum, {D. R.} and McClintock, {Peter V. E.} and A. Phillips and Bowley, {R. M.}",
year = "1977",
month = jan,
day = "4",
doi = "10.1098/rsta.1977.0008",
language = "English",
volume = "284",
pages = "179--224",
journal = "Philosophical Transactions of the Royal Society of London A",
issn = "0264-3820",
number = "1320",

}

RIS

TY - JOUR

T1 - The breakdown of superfluidity in liquid 4He : an experimental test of Landau's theory.

AU - Allum, D. R.

AU - McClintock, Peter V. E.

AU - Phillips, A.

AU - Bowley, R. M.

PY - 1977/1/4

Y1 - 1977/1/4

N2 - A single pulse time of flight technique has been used to determine the drift velocity v of the negative ions injected into liquid 4He from a field emission source. Measurements of v as a function of temperature T, pressure P and electric field E are presented within the range: 0.29 < T < 0.5 K; 21 x 10^5 < P < 25 x 10^5 Pa; 1 < E < 300 kV/m. The experimental results are in good agreement with Landau's theory of superfluidity. The data are used to demonstrate the inapplicability of two theories of super critical dissipation: by Takken, based on an assumption of coherent roton emission; and by Bowley and Sheard, based on the assumption of incoherent single-roton emission. The results are, however, shown to be in excellent agreement with Bowley and Sheard's incoherent two-roton theory, and the data are used to derive a numerical value of the matrix element. characterizing two-roton emission. The surprising absence of the single-roton emission process is discussed, and an upper bound is placed on the relevant matrix element.

AB - A single pulse time of flight technique has been used to determine the drift velocity v of the negative ions injected into liquid 4He from a field emission source. Measurements of v as a function of temperature T, pressure P and electric field E are presented within the range: 0.29 < T < 0.5 K; 21 x 10^5 < P < 25 x 10^5 Pa; 1 < E < 300 kV/m. The experimental results are in good agreement with Landau's theory of superfluidity. The data are used to demonstrate the inapplicability of two theories of super critical dissipation: by Takken, based on an assumption of coherent roton emission; and by Bowley and Sheard, based on the assumption of incoherent single-roton emission. The results are, however, shown to be in excellent agreement with Bowley and Sheard's incoherent two-roton theory, and the data are used to derive a numerical value of the matrix element. characterizing two-roton emission. The surprising absence of the single-roton emission process is discussed, and an upper bound is placed on the relevant matrix element.

U2 - 10.1098/rsta.1977.0008

DO - 10.1098/rsta.1977.0008

M3 - Journal article

VL - 284

SP - 179

EP - 224

JO - Philosophical Transactions of the Royal Society of London A

JF - Philosophical Transactions of the Royal Society of London A

SN - 0264-3820

IS - 1320

ER -