Adiabatic calorimetry has been found to be a satisfactory method for the dosimetry of submicrosecond electron pulses giving a dose of ∼5 Mrads per pulse. The calorimeters were thin graphite disks, and the output of the attached thermocouple was measured with a rapid response recorder. The absorbed dose in liquid samples was determined by using disks of equivalent dimensions in the same geometry and correcting for relative electron stopping powers. In this way G ( H2) from benzene was found to be 0.040 at <tex-math>$10^{14}\ \text{rads}/{\rm sec}$</tex-math> in agreement with low-dose-rate studies. Space-charge effects have been demonstrated, and these can reduce the dose in poorly conducting samples.

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