Experiments on the Formation and Surface States of Adsorbed Helium Films.
Final technical rept. Jan-Dec 74,
SUSSEX UNIV BRIGHTON (ENGLAND)
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This report describes progress made in the investigation of phases of He3 and He4 adsorbed on Vycor porous glass at low temperatures. The main experimental effort during this second year of the work has been taken up with the exploration of problems associated with the apparatus used for the three main branches of the work, namely 1 density of adsorbed helium, 2 nuclear magnetic resonance properties of He3 and He3 - He4 films, 3 a novel form of Pomeranchuk refrigeration using adsorbed helium. In addition, an extensive consideration of the magnetic properties of monolayer and sub-monolayer films is given, and copies of two conference papers are included.
- Physical Chemistry