Adsorption of 3He on Cesium

D. Ross, J. A. Phillips, J. E. Rutledge and P. Taborek
Department of Physics and Astronomy
University of California, Irvine 92697

Journal of Low Temperature Physics, 106, 81(1997)



Abstract

Introduction

Experiment

Results

Discussion

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Abstract

Adsorption isotherms of 3He on Cesium substrates have been measured in the temperature range from 0.2 K to 1.5 K. At liquid-vapor coexistence 3He wets Cesium at all temperatures studied. Step-like features are found in the isotherms which are similar to the prewetting transitions of 4He on Cs substrates, but the width of these steps is ~20 times wider for 3He than for 4He. In the case of 3He on Cs, the steps are located at a chemical potential about 0.6 K below liquid-vapor coexistence. If the low temperature behavior is interpreted to be first order prewetting, the prewetting critical point temperature is 0.6 ± 0.1 K