THE EVANESCENT NEUTRON-WAVE DIFFRACTOMETER - ON THE WAY TO SURFACE SENSITIVE NEUTRON-SCATTERING

被引：33

作者：

DOSCH, H ^{[1
]}

ALUSTA, K ^{[1
]}

LIED, A ^{[1
]}

DREXEL, W ^{[1
]}

PEISL, J ^{[1
]}

机构：

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

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1992年 / 63卷 / 12期

关键词：

D O I：

10.1063/1.1143841

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A novel experimental technique to observe the Bragg scattering of evanescent neutron waves is presented. The so-called EVA diffractometer, installed at the high-flux reactor of the Institut Laue-Langevin, allows the identification of neutron scattering from single crystal surfaces. We discuss the experimental setup, intensity, and resolution considerations and some first Bragg scattering signals from evanescent neutron waves excited at CaF2, InP, and MnF2 single crystal surfaces. The experimental results are discussed within the framework of the so-called distorted wave Born approximation and within a dynamical scattering theory. The limitations of both theoretical approaches to describe the Bragg scattering of evanescent neutron waves are indicated.

引用

页码：5533 / 5542

页数：10

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