QUANTUM EVAPORATION FROM SUPERFLUID HE-4 - NORMAL INCIDENCE

Authors
SOBNACK MB INKSON JC
Citation
Mb. Sobnack et Jc. Inkson, QUANTUM EVAPORATION FROM SUPERFLUID HE-4 - NORMAL INCIDENCE, Physical review. B, Condensed matter, 56(22), 1997, pp. 14271-14274
Citations number
22
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
56
Issue
22
Year of publication
1997
Pages
14271 - 14274
Database
ISI
SICI code
0163-1829(1997)56:22<14271:QEFSH->2.0.ZU;2-R
Abstract
We study the scattering of atoms and quasiparticles at the surface of He-4 at T=0 K. Using the microscopic theory of Beliaev in areal-space formulation we derive an equation of motion for the quasiparticles val id in bulk helium, through the surface and in the vacuum. Assuming nor mal incidence, we solve the equation and calculate probabilities for t he various surface scattering processes for a range of energies (betwe en 7.5 and 15 K). Some of the scattering rates obtained are markedly d ifferent from those reported recently.