Optical spectrometer 7401

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The CANBERRA Model 7401 is a comprehensive alpha spectrometer that can accommodate samples up to two inches in diameter in a double- width NIM package. The versatile sample chamber and instrument electronics support CANBERRA's own PIPS Detectors, which combine high resolution and low backgrounds in a rugged alpha detector with active areas up to 1200 mm 2 . In addition, the alternative use of most charged particle detectors is also supported. The Model 7401 fully integrates into one package a stainless steel vacuum chamber for low backgrounds and ease of cleaning, a vacuum gauge, detector bias supply, preamp/amplifier, pulser, discriminator, counter, and digital display. A stainless steel shelf and sample holder are included with each spectrometer, for reproducible detector/sample spacing, which is user selectable from 1 to 49 mm, in 4 mm increments.