Abstract
The responses of several of the recently described silicon avalanche detectors and tunnel diode preamplifiers to exposures of known gamma - and X-ray dose rates were measured over the energy range 34 keV to 1.33 MeV. Curves of detector isodose response and efficiency as a function of energy are presented, with a discussion of operating voltage effects. A preliminary detection efficiency is determined for exposures to 16.9 MeV neutrons and response as a function of dose is found for the beta -spectrum of 147Pm (maximum energy=230 keV). In all measurements, the tunnel diode preamplifier was used, providing very fast and low noise amplification. The measurements have demonstrated dosimetry capabilities of the avalanche detector-tunnel diode preamplifier over a wide range of energies and dose rates, and sensitivity to beta , gamma - and X-rays and to neutrons in a single detector.
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