Neutron radiography of helium II

M. E. Hayden; G. Archibald; P. D. Barnes; W. T. Buttler; D. J. Clark; M. D. Cooper; M. Espy; G. L. Greene; R. Golub; S. K. Lamoreaux; C. Lei; L. J. Marek; J. C. Peng; S. Penttila

doi:10.1016/S0921-4526(02)01974-9

Neutron radiography of helium II

M. E. Hayden, G. Archibald, P. D. Barnes, W. T. Buttler, D. J. Clark, M. D. Cooper, M. Espy, G. L. Greene, R. Golub, S. K. Lamoreaux, C. Lei, L. J. Marek, J. C. Peng, S. Penttila

Center for High Energy and High Field Physics

Research output: Contribution to journal › Conference article › peer-review

4 Scopus citations

Abstract

We have used a neutron radiography technique to investigate the spatial distribution of ³He atoms in very dilute liquid ³He-⁴He mixtures at temperatures below the superfluid transition temperature. By imposing heat currents and monitoring the subsequent redistribution of ³He within the sample volume we obtain a direct measurement of the relevant mass diffusion coefficient. Data from these experiments provides a striking demonstration of the manner in which the distribution of impurity atoms within the liquid can be influenced by the presence of a free surface.

Original language	English
Pages (from-to)	236-237
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	329-333
DOIs	https://doi.org/10.1016/S0921-4526(02)01974-9
State	Published - May 2003
Event	Proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: 20 Aug 2002 → 27 Aug 2002

Keywords

He-He mixtures
Diffusion
Helium vapour compression (HEVAC) effect
Neutron radiography
Superfluidity

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10.1016/S0921-4526(02)01974-9

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title = "Neutron radiography of helium II",

abstract = "We have used a neutron radiography technique to investigate the spatial distribution of 3He atoms in very dilute liquid 3He-4He mixtures at temperatures below the superfluid transition temperature. By imposing heat currents and monitoring the subsequent redistribution of 3He within the sample volume we obtain a direct measurement of the relevant mass diffusion coefficient. Data from these experiments provides a striking demonstration of the manner in which the distribution of impurity atoms within the liquid can be influenced by the presence of a free surface.",

keywords = "He-He mixtures, Diffusion, Helium vapour compression (HEVAC) effect, Neutron radiography, Superfluidity",

author = "Hayden, {M. E.} and G. Archibald and Barnes, {P. D.} and Buttler, {W. T.} and Clark, {D. J.} and Cooper, {M. D.} and M. Espy and Greene, {G. L.} and R. Golub and Lamoreaux, {S. K.} and C. Lei and Marek, {L. J.} and Peng, {J. C.} and S. Penttila",

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volume = "329-333",

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journal = "Physica B: Condensed Matter",

issn = "0921-4526",

note = "Proceedings of the 23rd international conference on low temper ; Conference date: 20-08-2002 Through 27-08-2002",

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TY - JOUR

T1 - Neutron radiography of helium II

AU - Hayden, M. E.

AU - Archibald, G.

AU - Barnes, P. D.

AU - Buttler, W. T.

AU - Clark, D. J.

AU - Cooper, M. D.

AU - Espy, M.

AU - Greene, G. L.

AU - Golub, R.

AU - Lamoreaux, S. K.

AU - Lei, C.

AU - Marek, L. J.

AU - Peng, J. C.

AU - Penttila, S.

PY - 2003/5

Y1 - 2003/5

N2 - We have used a neutron radiography technique to investigate the spatial distribution of 3He atoms in very dilute liquid 3He-4He mixtures at temperatures below the superfluid transition temperature. By imposing heat currents and monitoring the subsequent redistribution of 3He within the sample volume we obtain a direct measurement of the relevant mass diffusion coefficient. Data from these experiments provides a striking demonstration of the manner in which the distribution of impurity atoms within the liquid can be influenced by the presence of a free surface.

AB - We have used a neutron radiography technique to investigate the spatial distribution of 3He atoms in very dilute liquid 3He-4He mixtures at temperatures below the superfluid transition temperature. By imposing heat currents and monitoring the subsequent redistribution of 3He within the sample volume we obtain a direct measurement of the relevant mass diffusion coefficient. Data from these experiments provides a striking demonstration of the manner in which the distribution of impurity atoms within the liquid can be influenced by the presence of a free surface.

KW - He-He mixtures

KW - Diffusion

KW - Helium vapour compression (HEVAC) effect

KW - Neutron radiography

KW - Superfluidity

UR - http://www.scopus.com/inward/record.url?scp=0037906282&partnerID=8YFLogxK

U2 - 10.1016/S0921-4526(02)01974-9

DO - 10.1016/S0921-4526(02)01974-9

M3 - 會議論文

AN - SCOPUS:0037906282

SN - 0921-4526

VL - 329-333

SP - 236

EP - 237

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - Proceedings of the 23rd international conference on low temper

Y2 - 20 August 2002 through 27 August 2002

ER -

Neutron radiography of helium II

Abstract

Keywords

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