THE X-RAY-DIFFRACTION STATION AT THE ADONE WIGGLER FACILITY - PRELIMINARY-RESULTS (INCLUDING CRYSTAL PERFECTION)

被引:73
作者
COLAPIETRO, M
CAPPUCCIO, G
MARCIANTE, C
PIFFERI, A
SPAGNA, R
HELLIWELL, JR
机构
[1] CNR,IST STRUTT CHIM,I-00016 MONTEROTONDO,ITALY
[2] UNIV MANCHESTER,DEPT CHEM,MANCHESTER M13 9PL,LANCS,ENGLAND
[3] SERC,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND
关键词
D O I
10.1107/S0021889891011445
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The single-crystal X-ray diffractometer installed at the PWA Laboratory in Frascati is described. The Huber four-circle goniometer is controlled by an IBM-compatible personal computer by means of a plug-in board interface based on the LSI chip Am9513. The program CS running under MS-DOS performs a wide variety of operations from random search to data collection. The angular resolution of the diffractometer is 0.0025-degrees, while the instrumental resolution at 8 keV, with an Si(111) monochromator, is 0.0026-degrees. After preliminary tests. 2Zn insulin crystals were mounted on the diffractometer and reflections were measured using synchrotron radiation. The rocking curves show full widths at half-maxima (FWHM) in the range 0.013-0.031-degrees mainly due to the mosaicity.
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页码:192 / 194
页数:3
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