Abstract
Silicon surface barrier diode detectors of 1 cm2 and 25 mm2 sensitive area have given pulse height spectral resolutions of 17 kev and 13-? kev (FWHM) respectively, for 5.5 mev alpha particles. Reverse currents at 500 volts bias were less than 1 × 10-6 amps/cm2 with breakdown in excess of 1000 volts. A charge sensitive amplifier contributes 3-? and 10 kev noise (FWHM) with an input capacitive loading of 20 and 180 pf respectively.
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