Early and late effects in mouse lung and rectum.
No higher RBE's were found for late than for early damage in mouse rectum up to 70 weeks or mouse lungs up to 48 weeks after irradiation with 3.0 MeV neutrons (4 MeV deuterons on Be). The smallest neutron doses per fraction were 1.5 and 0.6 Gy for rectal and lung irradiation, respectively. There was a suggestion of higher late RBE's for small doses per fraction in the lung. Slow repair after 2 neutron doses split by 31 days was unequivocally demonstrated in the lung, of magnitude about 1 Gy, possibly decreasing after about 40 weeks.
D000818:Animals; D002588:Cesium Radioisotopes; D004307:Dose-Response Relationship, Radiation; D005214:Fast Neutrons; D005720:Gamma Rays; D008168:Lung / Q000528:radiation effects*; D008297:Male; D051379:Mice; D008808:Mice, Inbred CBA; D009502:Neutrons; D012007:Rectum / Q000528:radiation effects*; D012062:Relative Biological Effectiveness; D013997:Time Factors; D014965:X-Rays
D002588:Cesium Radioisotopes