Direct Comparisons of the NBS Absorbed Dose Calorimeters Irradiated with 20and 50MeV Electrons.

摘要

Two NBS absorbed dose calorimeters were compared in 20and 50MeV electron beams that were scattered with lead foils of various thickness. The internal structures of the calorimeters are identical. The non-portable model is enclosed in a 40cm x 40cm x 30cm thick graphite medium while a 30cm diameter x 15cm thick graphite medium was used to enclose the portable model. Measured results indicate that the three internal bodies of the calorimeters and their measuring circuits were constructed with sufficient care to produce essentially identical calorimetric responses to about 0.1%.