# roentgen

> legacy unit of measurement for the kerma of X-rays and gamma rays up to 3 MeV; equals 0.258 mC/kg

**Wikidata**: [Q321017](https://www.wikidata.org/wiki/Q321017)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Roentgen_(unit))  
**Source**: https://4ort.xyz/entity/roentgen


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)