EXCITATIONS IN LIQUID-HE-4 BEYOND THE ROTON

被引：19

作者：

FAK, B ^{[1
]}

REGNAULT, LP ^{[1
]}

BOSSY, J ^{[1
]}

机构：

[1] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 1992年 / 89卷 / 1-2期

关键词：

D O I：

10.1007/BF00692607

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The dynamic structure factor S(Q,E) for liquid He-4 at saturated vapor pressure has been measured by inelastic neutron scattering for wave vectors Q between 1.9 and 2.8 angstrom-1. The temperature dependence is studied for Q=2.3 angstrom-1. The sharp phonon-roton peak gradually disappears with increasing temperature, while the scattering at higher energies is nearly temperature independent. The experimental results are compared with the density-quasiparticle interpretation introduced by Glyde and Griffin, and with a model describing the hybridization with the multiparticle excitations.

引用

页码：345 / 354

页数：10

共 22 条

[1]

ANDERSEN KH, 1992, IN PRESS PHYSICA B, V180

[2]

ANDERSEN KH, 1991, THESIS U KEELE

[3] PSEUDOPOTENTIAL THEORY OF INTERACTING ROTON PAIRS IN SUPERFLUID HE-4 [J].