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高能辐射的放射生物学对于放射防护,“空间”生物学和放射生物学机制的了解有重要的意义。近来研究证明,400或600MeV中子在继发带电粒子最少的位置上有较高的r.b.e值。600MeV与400MeV中子束和π介子一样,照射精原细胞后可看到一个异常“反肩”的存活曲线。该弯曲部分在低剂量时可导致很高的r.b.e值。作者采用600MeV中子束,来研究上述现象。
Radiobiology of high-energy radiation is of great importance to the understanding of radiological protection, “space” biology and radiobiological mechanisms. Recent studies have shown that 400 or 600 MeV neutrons have a higher r.b.e value at the positions where secondary charged particles are least. As with 600 MeV and 400 MeV neutron beams and pions, an abnormal “anti-shoulder” survival curve can be seen after irradiation with spermatogonia. This curved portion results in a very high r.b.e value at low doses. The author uses 600MeV neutron beam to study the above phenomenon.