Definition:Roentgen (Unit)
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Definition
The roentgen is a quantity of either x-rays or gamma rays which produces, together with its secondaries, a total of $2 \cdotp 082 \times 10^9$ electron-ion pairs in $0 \cdotp 001293$ gram of air.
Source of Name
This entry was named for Wilhelm Conrad Röntgen.
Sources
- 1964: Milton Abramowitz and Irene A. Stegun: Handbook of Mathematical Functions ... (previous) ... (next): $2$. Physical Constants and Conversion Factors: Table $2.4$ Miscellaneous Conversion Factors