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Our studies of the photomultiplier x-ray detector reveal that it is not only simple, rugged, and adaptable but that its high speed of response and high sensitivity recommend its use as a primary research tool. It can follow x-ray events as short as 10−5 second. Under optimum condition its sensitivity is limited only by the statistical noise of the incident x-ray quanta. Its chief defect is fatigue, the mechanism of which has been studied. This paper includes a general discussion of the use of this detector and of its characteristics.
Marshall et al. (1947) studied this question.