Heat capacity and sticking probability measurements of sup 4 He submonolayers adsorbed on evaporated Ag films: Bose statistics in two dimensions

Journal Article · Mon May 14 04:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.2386· OSTI ID:6804737

Kenny, T W; Richards, P L ^[1]

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1. Department of Physics, University of California, Berkeley, Berkeley, CA (USA) Materials and Chemical Sciences Division, Lawrence Berkeley Laboratories, Berkeley, CA (USA)

We have measured the heat capacity of submonolayers of {sup 4}He adsorbed on Ag films between 1.7 and 3.3 K. Good fits to the results are obtained with a model of a noninteracting two-dimensional Bose gas. The sticking probability for room-temperature {sup 4}He atoms on cold Ag has been measured as a function of substrate temperature and {sup 4}He coverage. The sticking probability is 4% at low coverage, and abruptly drops to 1% for coverages above 0.5 monolayer.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6804737
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:20; ISSN 0031-9007; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADHESION
BOSE-EINSTEIN GAS
COVERINGS
DATA
ELEMENTS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FILMS
HELIUM 4
HELIUM ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEDIUM TEMPERATURE
METALS
NUCLEI
NUMERICAL DATA
PHYSICAL PROPERTIES
PROBABILITY
SILVER
SPECIFIC HEAT
STABLE ISOTOPES
SUBSTRATES
THERMODYNAMIC PROPERTIES
THIN FILMS
TRANSITION ELEMENTS
ULTRALOW TEMPERATURE