External dose estimates of laboratory rats and mice during exposure to dispersed neutron-activated 56Mn powder. (13th August 2022)

• Record Type: Journal Article
• Authors: Stepanenko, Valeriy; Sato, Hitoshi; Fujimoto, Nariaki; Shichijo, Kazuko; Toyoda, Shin; Kawano, Noriyuki; Endo, Satoru; Kaprin, Andrey; Ivanov, Sergey; Shegay, Peter; Petukhov, Alexey; Kolyzhenkov, Timofey; Bogacheva, Victoria; Chaizhunusova, Nailya; Shabdarbaeva, Dariya; Zhumadilov, Kassym; Hoshi, Masaharu
• Is Part Of: Journal of radiation research. Volume 63(2022)supplement 1
• Page Start: i16
• Page End: i20
• Publication Date: 2022-08-13
• Subjects: sprayed neutron-activated 56Mn powder -- laboratory animals -- dosimetry of external gamma-irradiation -- radiophotoluminescence glass dosimeters; Radiology, Medical -- Periodicals; Radiobiology -- Periodicals; Radiation -- Periodicals; 616.0757
• DOI: 10.1093/jrr/rrac032
• Languages: English
• ISSNs: 0449-3060

Abstract

Abstract: Estimates of external absorbed dose in experimental animals exposed to sprayed neutron-activated 56 Mn powder are necessary for comparison with internal absorbed doses estimated under the same exposure conditions, which is required for a correct interpretation of the observed biological effects. It has been established that the measured dose of external absorbed dose as a result of gamma irradiation range 1–15 mGy, which is order of magnitude less than the maximal dose of internal gamma and beta irradiation of the whole body of the same experimental animals irradiated under the same conditions: according to the available literature data, the maximal values ​​of absorbed dose of internal gamma-beta irradiation of the whole body are in the range of 330 mGy–1200 mGy for mice and 100 mGy–150 mGy for rats. It is concluded that under the conditions of experiments with dispersed neutron-activated powder 56 MnO2, internal gamma-beta irradiation of experimental animals is the main factor of radiation exposure compared to external gamma irradiation.