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Titolo:
HIGH-PRESSURE POWDER DIFFRACTION ON SYNCHROTRON SOURCES
Autore:
NELMES RJ; MCMAHON MI;
Indirizzi:
UNIV EDINBURGH,DEPT PHYS & ASTRON,MAYFIELD RD EDINBURGH EH9 3JZ MIDLOTHIAN SCOTLAND
Titolo Testata:
Journal of synchrotron radiation
, volume: 1, anno: 1994,
parte:, 1
pagine: 69 - 73
SICI:
0909-0495(1994)1:<69:HPDOSS>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
CRYSTAL-STRUCTURE; IMAGING PLATE; PHASE;
Keywords:
HIGH-PRESSURE DIFFRACTION; POWDER DIFFRACTION; IMAGE PLATE TECHNIQUES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
R.J. Nelmes e M.I. Mcmahon, "HIGH-PRESSURE POWDER DIFFRACTION ON SYNCHROTRON SOURCES", Journal of synchrotron radiation, 1, 1994, pp. 69-73

Abstract

The sample volume in diamond-anvil pressure cells suitable for X-ray powder diffraction studies is very small (less than or equal to 100 mum across). The resulting low signal-to-noise ratio has made it very difficult to obtain useful results with monochromatic angle-dispersive techniques, and the alternative white-beam energy-dispersive techniques have limited resolution and generally give unreliable peak intensities. The situation has been transformed recently by the introduction ofthe image-plate two-dimensional detector, which allows angle-dispersive methods to be used with a greatly increased signal and improved powder averaging. A short review is given of this development, the experimental techniques, and the principal advantages, particularly as foundin results obtained at SRS Daresbury over the past two or three years.

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Documento generato il 26/09/20 alle ore 07:42:39