physical quality radiation quality true NCRP Glossary (https://ncrponline.org/wp-content/themes/ncrp/PDFs/NCRP-Composite-Glossary.pdf) and see https://melodi-online.eu/wp-content/uploads/2021/04/02-What-is-radiation-quality-Goodhead.pdf Is a quality of radiation that reflects the fluence spectrum of charged and neutral particles within the material or medium where dose is being deposited. Jack Miller Radiation quality is often expressed in terms of the linear energy transfer of the ionising particles that deliver the absorbed dose. Rossi, Harald H. Specification of Radiation Quality. Radiation Research, vol. 10, no. 5, Radiation Research Society, 1959, pp. 522 31, https://doi.org/10.2307/3570787. But this is an over simplification.