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A Direct-Reading X-ray Intensity Comparator: Its Radiological and Physical Applications

London Hospital, Whitechapel, E.1

This excerpt was created in the absence of an abstract.

The design of a twin-chamber X-ray intensity comparator is described, which employs a circuit given in an earlier paper (Kemp, 1945). The instrument may be employed with equal facility in work on both therapeutic and diagnostic tubes. Its application to such measurements as those of percentage depth doses, cross-field and along-the-beam intensity distributions in air, half-value layers, dosage rates, and small quantities of X radiation in röntgens are considered in detail, and an example of its use outside the sphere of ordinary radiological measurements is also given.