Quantum evaporation from liquid /sup 4/He by rotons

Journal Article · Mon Apr 23 04:00:00 EST 1984 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.52.1528· OSTI ID:6778423

Hope, F R; Baird, M J; Wyatt, A F.G.

We have shown that rotons as well as phonons can evaporate /sup 4/He atoms in a single-quantum process. Measurements of the time of flight and the angular distribution of the evaporated atoms clearly distinguish between evaporation by phonons and rotons. The results indicate that energy and the parallel component of momentum are conserved at the free liquid surface.

• Research Organization: Department of Physics, University of Exeter, Exeter, England
• OSTI ID: 6778423
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 52:17; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR DISTRIBUTION
BOUNDARY CONDITIONS
COLLISIONS
DISTRIBUTION
ENERGY-LEVEL TRANSITIONS
EVAPORATION
EVEN-EVEN NUCLEI
EXCITATION
FLUIDS
HELIUM 4
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
NUCLEI
PHASE TRANSFORMATIONS
PHONONS
QUANTUM FLUIDS
QUASI PARTICLES
ROTONS
SIGNALS
STABLE ISOTOPES
TIME-OF-FLIGHT METHOD
ULTRALOW TEMPERATURE