Quantum reflection: Focusing of hydrogen atoms with a concave mirror
Journal Article
·
· Physical Review Letters; (USA)
- Natuurkundig Laboratorium, Universiteit van Amsterdam, Valckenierstraat 65/67, 1018 XE Amsterdam, The Netherlands (NL) Van der Waals Laboratorium, Universiteit van Amsterdam, Valckenierstraat 65/67, 1018 XE Amsterdam, The Netherlands (NL)
We use a concave spherical mirror to focus at 18-mm-diam beam of H atoms down to 0.5 mm. The mirror consists of a fused-quartz substrate polished to optical precision and coated with a liquid-{sup 4}He film to obtain high reflectivity. The temperature dependence of the focused beam intensity enables us to study the influence of the dynamic surface roughness on the reflection of the H atoms. Both zero-point fluctuations and thermal excitations turn out to be of importance. A monolayer of {sup 3}He does not significantly affect the results.
- OSTI ID:
- 5350813
- Journal Information:
- Physical Review Letters; (USA), Vol. 63:16; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HELIUM 4
REFLECTIVITY
HYDROGEN
FOCUSING
MIRRORS
QUARTZ
ATOMIC BEAMS
COATINGS
FLUCTUATIONS
QUANTUM MECHANICS
ROUGHNESS
SPHERICAL CONFIGURATION
SPIN ORIENTATION
SUBSTRATES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
THIN FILMS
ULTRALOW TEMPERATURE
BEAMS
CHALCOGENIDES
CONFIGURATION
ELEMENTS
EVEN-EVEN NUCLEI
FILMS
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MECHANICS
MINERALS
NONMETALS
NUCLEI
OPTICAL PROPERTIES
ORIENTATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILICON COMPOUNDS
SILICON OXIDES
STABLE ISOTOPES
VARIATIONS
656003* - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HELIUM 4
REFLECTIVITY
HYDROGEN
FOCUSING
MIRRORS
QUARTZ
ATOMIC BEAMS
COATINGS
FLUCTUATIONS
QUANTUM MECHANICS
ROUGHNESS
SPHERICAL CONFIGURATION
SPIN ORIENTATION
SUBSTRATES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
THIN FILMS
ULTRALOW TEMPERATURE
BEAMS
CHALCOGENIDES
CONFIGURATION
ELEMENTS
EVEN-EVEN NUCLEI
FILMS
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MECHANICS
MINERALS
NONMETALS
NUCLEI
OPTICAL PROPERTIES
ORIENTATION
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILICON COMPOUNDS
SILICON OXIDES
STABLE ISOTOPES
VARIATIONS
656003* - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)