The Big Contribution of vac IN x-RAY V
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In X-ray spectrographs analysis, evacuation of the radiation path results in significantly higher counting rates than those obtained in air or even helium — particularly for the lighter elements magnesium (12) through sulphur (17). The true value of the Norelco Vacuum Spectro graph lies in the fact that its satisfactory use as a routine laboratory and industrial tool, requires no expert supervision to obtain optimum perform ance. It can be readily integrated into existing laboratory or industrial conditions to provide de
/ / / / / % Tranémittarice f/// VS ·: -: ψ Vacuum (Microns) 100 9 8 7 % TRANSMITTANCE
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pendable data. It is versatile, durable and ideally suited for routine as well as diverse applications. The graph here illustrated reveals that the per centage of quanta transmittance varies minutely with increases in vacuum below 100 microns, (0.1 mm. Hg.). In terms of efficiency, this degree of vacuum is obtained in less than one minute with the Norelco vacuum apparatus — and within this time period, offers ideal conditions for reproduc ible results which are well within the range of required statistical accuracy.
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Spectrographic Analysis The Vacuum Spectrograph is universal in the sense that it may be used to provide either evacuated or gas-filled atmospheres. Two crystals, mounted on a holder in the X-ray path, permit optional choice of either crystal without breaking vacuum — effectively extending the analytical range to all detectable elements. Two detectors, scintillation and proportional, may be used alternatively or sequentially with either crystal.
P H I L I P S ELECTRONIC INSTRUMENTS A Division of Philips Electronics and Pharmaceutical Industries Corp. 750 SOUTH FULTON AVENUE. MOUNT VERNON, N-Y. In Canada: Research & Control Instruments · Philips Electronics Industries Ltd. · 116 Vanderhoof Ave. · Leaside, Toronto 17, Ont.
