卫星生物搭载舱的辐射剂量测量及蚕卵生物叠试验(英文)

Radiation Dose Measurement and Biostack Experiment in Biocabin on Board Satellite

本文利用LiF热释光剂量计对我国生物搭载舱内外宇宙辐射剂量作了监测研究。经过八天的近地轨道飞行,舱内累积辐射剂量约为0.53±0.04mGy,平均日剂量约为0.07mGy/d。舱内辐射剂量主要是能量为50MeV 以上的高能质子形成的。这一剂量水平比地面高27倍,但未超过最大允许剂量,在评价空间生物效应时可作参考。本文还讨论了屏蔽厚度的影响,中子对剂量的贡献及舱内平均日剂量与轨道高度的关系。在生物舱内放置了CR-39塑料核径迹探测器与蚕卵组成的生物叠进行宇宙线重粒子及其生物效应的研究。为判定蚕卵样品是否被重粒子所击中,解决了重粒子射入蚕卵的径迹定位技术。试验表明,生物叠中被重粒子击中的蚕卵孵化率略高于未被击中的蚕卵孵化率,虽因样本量少不能满足统计学要求,但其趋势与国外报导的某些试验结果相一致。

Radiation doses outside and inside the biocabin on board the Chineserecoverable satellite were measured with LiF thermoluminescent dosimeters.The dose levelwas 0.53±0.04 mGy accumlated in 8 day flight period,which corresponds to 0.07mGy/d,and is about 28 times as high as the ground control value.A kind of biostack,sandwiched silkworm eggs and CR-39 plastic nuclear track detectors,was designed forrecording the high atomic number and high energy(HZE)particles from the cosmic ray andtheir biological effect.