The measurement of the surface dose and the calibration of soft x-ray dosimeters

A method is presented for calibrating the commerical soft X-ray dosimeters against a device which measures back-scatter contribution in addition to the ionization produced by direct radiation. The calibration of these dosimeters directly in terms of surface dose in Rad offers greater convenience for routine use relieving the physicists of some routine calculations. The details of construction of the surface chamber and the results of calibration of a soft X-ray chamber, also designed in this laboratory, are presented.