【摘要】 在一起镅—铍中子源事故中,有14人受到内外混合照射。照后初期对6名受照者进行了染色体畸变分析并估算其生物剂量。结果生物剂量与理物剂量相当接近,盗源者生物剂量为96.3～127.8mGy,物理剂量为121mGy,其他人员生物剂量和物理剂量在1～30mGy之间。 在事故后一年半时,用稳定性畸变分析方法,分析了14例受照者的染色体畸变,结果受照组仍明显高于对照组。更多还原

【Abstract】 An ²⁴¹Am-Be neutron source of 120 millicrocurie was stolen by a boyon April the 3rd, 1982. He brought it to his home. The neutron source was brokenand the radioactive substance contaminated the whole family. He and his other familymembers did not leave the contaminated environment for 70 days. There were altogether14 persons exposed to the radioactive substances. Chromosome aberrations of peripheral blood lymphocytes of six exposed cases wereanalysed on an early day of June 1982. The exposure doses were estimated by the fre-quency of chromosome aberration. Biological dose absorbed by the boy who stole the sou-rce was about 96～128 mGy. （physical dose abous 120 mGy）, the others were about10～30 mGy （physical dose about 10～30 mGy）. The results indicated that biologicaldoseswere quite approximate to the physical doses. One and half years after the accident, the analysis of stable chromosome aberrationsfor 14 exposed persons showed that the frequencies of chromosome aberraiions of theirradiated individuals still were higher than those of the controls. The differences betweenthem are very significant.更多还原