ELASTIC REFLECTION OF HE-4 ATOMS FROM THE SURFACE OF LIQUID-HE-4

被引:9
作者
TUCKER, MAH
WYATT, AFG
机构
[1] Department of Physics, University of Exeter, Exeter, EX4 4QL, Stocker Road
关键词
D O I
10.1007/BF00753838
中图分类号
O59 [应用物理学];
学科分类号
摘要
The reflection of incident He-4 atoms from the surface of liquid He-4 can yield information on the microscopic features of the liquid at the surface. Edwards et al. have measured this reflectivity and have developed a theoretical model which successfully described the measurements. However, the density profile of the liquid He-4 surface has recently been determined experimentally, and this can now be used to model the reflectivity without any freely adjustable parameters. We use this density profile and the expeviritentally-determined interatomic pair potential to derive an effective potential for the incoming atom, and then solve the single-particle Schroedinger equation to find the reflectivity as a function of wavevector perpendicular to the surface. Within the uncertainty in the density profile and interatomic potential, we have chosen values that give good agreement between the measured and calculated reflectivities.
引用
收藏
页码:105 / 120
页数:16
相关论文
共 31 条
[1]   VORTEX RINGS IN A BOSE FLUID [J].
AMIT, D ;
GROSS, EP .
PHYSICAL REVIEW, 1966, 145 (01) :130-&
[2]   ACCURATE INTER-MOLECULAR POTENTIAL FOR HELIUM [J].
AZIZ, RA ;
NAIN, VPS ;
CARLEY, JS ;
TAYLOR, WL ;
MCCONVILLE, GT .
JOURNAL OF CHEMICAL PHYSICS, 1979, 70 (09) :4330-4342
[3]  
BARKER JA, 1991, ENCYCL PHYS, P544
[4]   THE SURFACE BOUNDARY-CONDITIONS FOR QUANTUM EVAPORATION IN HE-4 [J].
BROWN, M ;
WYATT, AFG .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1990, 2 (22) :5025-5046
[5]  
Campbell C E, 1978, PROGR LIQUID PHYSICS, P6
[6]   EXTENDED JASTROW FUNCTIONS [J].
CAMPBELL, CE .
PHYSICS LETTERS A, 1973, A 44 (07) :471-473
[7]  
COLE GHA, 1978, PROGR LIQUID PHYS, pCH1
[8]   Contribution to the quantum-mechanical theory of the equation of state and the law of corresponding states. Determination of the law of force of helium. [J].
De Boer, J ;
Michels, A .
PHYSICA, 1938, 5 :945-957
[9]  
DINGLE RB, 1949, PHILOS MAG, V40, P573
[10]   INHOMOGENEOUS LIQUID-HE-4 - A DENSITY FUNCTIONAL-APPROACH WITH A FINITE-RANGE INTERACTION [J].
DUPONTROC, J ;
HIMBERT, M ;
PAVLOFF, N ;
TREINER, J .
JOURNAL OF LOW TEMPERATURE PHYSICS, 1990, 81 (1-2) :31-44