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实验研究了用重水反应堆 n+γ混合束(中子有效能量为1.91兆电子伏;总剂量中,中子成分占40%左右)照射离体人血诱发的染色体畸变的剂量-效应关系。实验剂量范围:中子约6—170拉德,γ约8—300拉德。对混合照射,双+环和无着丝点畸变分别满足以下二次多项式和直线模式:y_(双+环)=(11.76±3.46)×10~(-4)D_(n+y)(3.69±0.91)×10~(-6)D~2_(n+y)y_无=(22.64±1.55)×10~(-4)D_(n+y)对混合照射中中子成分诱发的双+环满足以下直线模式:Y_(双+环)=(-0.05+0.04)+(54.4±5.6)×10~(-4)D_n对双+环,n+γ混合照射相对于180kV X 射线照射的 RBE 值,随剂量增加而降低,在实验剂量范围内,大约从2.11降到1.16。
The dose-response relationship of chromosomal aberration induced by irradiation of human blood in vitro with heavy-water reactor n + γ mixed neutron (effective energy of neutron of 1.91 MeV; total dose of about 40% neutrons) was experimentally studied. Experimental dose range: neutron about 6-170 rad, γ about 8-300 rad. For the mixed radiation, the double + ring and the no-filament distortion respectively satisfy the following quadratic polynomials and linear modes: y_ (double + ring) = (11.76 ± 3.46) × 10 -4 D n (n + y) ± 0.91) × 10 ~ (-6) D ~ 2_ (n + y) y_non = (22.64 ± 1.55) × 10 ~ (-4) D_ (n + y) + Ring satisfies the following straight line mode: Y_ (double + ring) = (-0.05 + 0.04) + (54.4 ± 5.6) × 10 -4 D_n pairs of double ring, n + γ mixed irradiation relative to 180kV X-ray irradiation The RBE value decreased with dose and decreased from 2.11 to 1.16 in the experimental dose range.