@article{oai:nagasaki-u.repo.nii.ac.jp:00018088, author = {Sasaki, Masao S. and Hayata, Isamu and Kamada, Nanao and Kodama, Yoshiaki and Kodama, Seiji}, issue = {Supple}, journal = {Journal of radiation research}, month = {Dec}, note = {Chromosome aberrations were studied in peripheral blood lymphocytes of 43 persons who were exposed to low-level radiation of mixed neutrons and γ-rays resulting from the JCO criticality accident. When the age-adjusted frequencies of dicentric and ring chromosomes were compared with the dose calibration curve established in vitro for ^<60>Co γ-rays as a reference radiation, a significant correlation was observed between the chromosomally estimated doses and the documented doses evaluated by physical means. The regression coefficient of the chromosomal doses against the documented doses, 1.47 ± 0.33, indicates that the relative biological effectiveness of fission neutrons at low doses is considerably higher than that currently adopted in the radiation protection standard., Journal of radiation research. 2001, 42(Supple), p.107-116}, pages = {107--116}, title = {Chromosome Aberration Analysis in Persons Exposed to Low-level Radiation from the JCO Criticality Accident in Tokai-mura}, volume = {42}, year = {2001} }