A Direct-Charging Detector for Measuring the Pulse Shape, Absorbed Dose Rate, and γ-Radiation Dose

A method for the calculation and the results of experimental tests of direct-charging detectors of γ-radiation are described. The current sensitivities to monochromatic γ-rays with energies of 0.3–10 MeV for three plane detector designs with the thicknesses of the dielectric layers of 0.5 to 2 cm are presented. The sensitivity is a function of energy within this range, and its minimum and maximum values differ by a factor of ten. Therefore, when using direct-charging detectors for measuring the absorbed dose rate and radiation dose, the knowledge of the γ-radiation spectrum is necessary. The spectrum is unnecessary in radiation pulse-shape measurements. The detector amplitude characteristic is linear for values of the absorbed dose rate of ≤1015 rad/s.