NEUTRON INELASTIC-SCATTERING FROM SUPERFLUID HE-4 BEYOND THE ROTON MINIMUM

被引：22

作者：

FAK, B

ANDERSEN, KH

机构：

[1] Institut Laue-Langevin, 38042 Grenoble Cedex

来源：

PHYSICS LETTERS A | 1991年 / 160卷 / 05期

关键词：

D O I：

10.1016/0375-9601(91)90249-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dynamic structure factor S(Q, E) for superfluid He-4 at saturated vapor pressure and T = 1.3 K has been measured by neutron inelastic scattering for wave vectors between 1.9 and 4.0 angstrom-1. The observed spectra clearly show how weight is transferred from the one-phonon excitation to the multiphonon spectrum, which gradually transforms into a single peak centered slightly below the recoil energy.

引用

页码：468 / 472

页数：5

共 25 条

[1]

Andersen K. H., UNPUB

[2]

ANDERSEN KH, 1992, IN PRESS PHYSICA B, V180

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