The energy-dispersive reflectometer at BESSY II:: a challenge for thin film analysis

被引：24

作者：

Pietsch, U

Grenzer, J

Geue, T

Neissendorfer, F

Brezsesinski, G

Symietz, C

Möhwald, H

Gudat, W

机构：

[1] Univ Potsdam, Inst Phys, D-14415 Potsdam, Germany

[2] Inst Astrophys, D-14482 Potsdam, Germany

[3] MPI Kolloid & Grenzflachenforsch, D-14476 Golm, Germany

[4] BESSY GmbH, D-12489 Berlin, Germany

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2001年 / 467卷

关键词：

energy-dispersive reflectometry; synchrotron radiation; X-ray diffuse scattering;

D O I：

10.1016/S0168-9002(01)00730-6

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Installed in 1999 the energy-dispersive reflectometer at the 13.2 bending magnet employs the exponentially decaying white X-ray emission spectrum of the 1.7 GeV storage ring of BESSY II outside the vacuum. Using an energy-dispersive detector specular and longitudinal-diffuse reflectivity spectra of thin films can be recorded simultaneously between 0.2 Angstrom (-1) <q(z) < 1.2 Angstrom (-1) within a few seconds. The capability of the experiment is demonstrated probing the correlation length of Cd-arachidate and -stearate films at room temperature and its change during annealing. At T = 70 degreesC we observe an instantaneous decay of specular Bragg peaks accompanied with an increase of the diffuse scattering. This indicates the onset of the melting of 2D-ordered acid domains. The vertical diffusion coefficient is estimated to be about 2 x 10(-24) m(2)/s. (C) 2001 Elsevier Science BN. All rights reserved.

引用

页码：1077 / 1080

页数：4

共 5 条

[1] Temperature- and time-dependent investigations of cadmium stearate and uranyl stearate multilayers by means of neutron reflectivity measurements [J].