roentgen per hour at one meter

roentgen per hour at one meter

[¦rent·gən pər ‚au̇r at ‚wən ′mēd·ər]
(nucleonics)
A unit of γ-ray source strength, corresponding to a dose rate of 1 roentgen per hour at a distance of 1 meter in air. Symbolized RHM.
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