Light induced nucleation of vapour bubbles at the interface of a solid and superheated liquid helium i: test of the photoelectron hypothesis

We report further studies of light induced enhancement of heat transfer from a solid into liquid helium 1. We have previously found that a flash of visible light applied to a solid surface immersed in the superheated liquid results in the production of vapour bubbles and a subsequent decrease in liq...

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Bibliographic Details
Published in:Cryogenics (Guildford) 1984-01, Vol.24 (4), p.211-213
Main Authors: Lezak, D., Brodie, L.C., Semura, J.S.
Format: Article
Language:English
Subjects:
cryogenics
heat transfer
light
liquid helium
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Summary:We report further studies of light induced enhancement of heat transfer from a solid into liquid helium 1. We have previously found that a flash of visible light applied to a solid surface immersed in the superheated liquid results in the production of vapour bubbles and a subsequent decrease in liquid layer superheat. Because there appeared to be a long wavelength cut-off we felt that this effect could be due to a mechanism involving photoemission of electrons into the liquid helium. In this hypothesis, electrons are first detached from the solid by the action of light and second, serve as bubble nuclei in the superheated liquid helium. The results reported in this paper fail to support this explanation.
ISSN:0011-2275
1879-2235
DOI:10.1016/0011-2275(84)90133-4