1 This practice covers the preparation and use of semi-adiabatic calorimeters for measurement of absorbed dose and routine dosimeter calibration when irradiated with electrons for radiation processing applications. The calorimeters are either transported by a conveyor past a scanned electron beam or are stationary in a broadened beam.
2 This practice applies to electron beams in the energy range from 1.5 to 12 MeV.
3 The absorbed dose range depends on the absorbing material and the irradiation and measurement conditions. Minimum dose is approximately 100 Gy and maximum dose is approximately 50 kGy.
4 The average absorbed-dose rate range shall generally be greater than 10 Gy·s.
5 The temperature range for use of these calorimeters depends on the thermal resistance of the materials, on the calibrated range of the temperature sensor, and on the sensi-tivity of the measurement device.
6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.
ISO/ASTM 51631:2003 history
2020ISO/ASTM 51631:2020 Practice for use of calorimetric dosimetry systems for dose measurements and dosimetry system calibration in electron beams
2013ISO/ASTM 51631:2013 Practice for use of calorimetric dosimetry systems for electron beam dose measurements and dosimetery system calibrations
2003ISO/ASTM 51631:2003 Practice for use of calorimetric dosimetry systems for electron beam dose measurements and dosimeter calibrations
2002ISO/ASTM 51631:2002 Practice for use of calorimetric dosimetry systems for electron beam dose measurements and dosimeter calibrations