Tables for
Volume C
Mathematical, physical and chemical tables
Edited by E. Prince

International Tables for Crystallography (2006). Vol. C, ch. 10.2, p. 962

Section X-ray diffraction and X-ray analysis apparatus

D. C. Creagha and S. Martinez-Carrerab

aDivision of Health, Design, and Science, University of Canberra, Canberra, ACT 2601, Australia, and bSan Ernesto, 6-Esc. 3, 28002 Madrid, Spain X-ray diffraction and X-ray analysis apparatus

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X-ray-generating devices such as sealed tubes and rotating-anode generators produce intense beams of small cross section and are capable of giving severe radiation burns within a second or so of exposure. Great care is necessary when working close to the exit port of these devices.

Apertures in the housing enclosing the X-ray source should be covered by a shutter when the source is not being used. Interlocking devices should exist to prevent the emission of X-rays when:

  • (i) the shutter is open without the analysing components and the beam stops being in place;

  • (ii) the analysing device is not properly in its position in relation to the housing.

Housings, shutters, shielded enclosures, and beam stops should be constructed such that the dose equivalent at any accessible point 0.05 m from their surface does not exceed 25 mSv for all practical operating conditions of the source.

Warning lights and illuminated signs should be fitted, interlocked such that they are lit when a shutter is open.

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