Microsecond Measurement of the Phosphorescence of X-Ray Fluorescent Screens
- 1 June 1947
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 18 (6) , 512-518
- https://doi.org/10.1063/1.1697685
Abstract
Microsecond square‐wave x‐ray pulses, repeated a thousand times a second, were obtained by operating an x‐ray tube directly from a radar pulser. The phosphorescent build‐up and decay of light emitted by fluorescent materials when irradiated by the x‐ray pulses was observed with a multiplier phototube connected to an oscilloscope. Oscillograms of CaWO4 (radiographic intensifying screen) and BaSO4 indicate simple exponential response, with decay to 1/eth intensity in 6 and 0.8 microseconds, respectively. MgWO4 and Patterson B (fluoroscopic) and D (photofluorographic) screens were found to complete their main response to microsecond excitation in 10 to 100 microseconds, but their decay is not exponential.This publication has 5 references indexed in Scilit:
- Decay in Brightness of Infra-Red Sensitive PhosphorsPhysical Review B, 1946
- Cathodo-luminescence: part I. Growth and decay processesProceedings of the Physical Society, 1946
- The phosphorescence of various solidsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1945
- Luminescence During Intermittent Electron BombardmentJournal of Applied Physics, 1939
- Electrical and Luminescent Properties of Phosphors Under Electron BombardmentJournal of Applied Physics, 1939