Expressions are derived relating counting rate measured with quantum detectors to the dosage rate in roentgens. The number of quanta/cm2 per roentgen is strongly energy dependent. In the x‐ray region 5 to 50 kv, however, the variation of the quantum counting efficiency with wavelength of some counters (e.g., argon Geiger counter) matches fairly closely the energy dependence factor, and hence such detectors can be used as r‐meters.
REFERENCES
1.
Permissible Dose from External Sources of Ionizing Radiation (Natl. Bur. Standards Handbook 59, Washington, 1954).
2.
3.
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© 1956 American Institute of Physics.
1956
American Institute of Physics
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