摘要
本文测定了^(134)Cs通过菜豆叶系向其他部分转移的转移因子TF,研究了污染溶液酸度、叶面^(134)Cs放射性活度、菜豆的生长阶段、Cs载体及Cs的化学形式对TF的影响。实验结果表明,对开始结荚期(荚果长1cm)的菜豆在pH5.5、^(134)Cs表面活度为3.1×10~2Bq/m^2测得的TF(荚果)为7.3×10^(-2)Bq·kg^(-1)(鲜重)/Bq·m^(-2),高于其他生长阶段的TF(荚果);K^+的存在使^(134)Cs的TF提高;Cs的化学形式影响^(134)Cs的转移,^(134)CsI更易被菜豆吸收。
The transfer factors (TF) of ^(134)Cs from bean foliage to itsother parts were measured. Some factors which affect transfer factors of^(134)Cs were studied,such as acidity, surface specific activity on foliage,stages of bean development,carrier and chemical species of ^(134)Cs.The re-sults showed that when bean foliage was contaminated at its podding stage,the TF of ^(134)Cs is 7.3 × 10^(-2)=Bq·kg^(-1)/Bq·m^(-2)and it is higher than that atother development stages. The presence of K^+ increases TF of ^(134)Cs.Che-mical species of ^(134)Cs influence its transfer.It was found that the uptakeof ^(134)CsI by bean leaves is much easier than others.
出处
《辐射防护》
CAS
CSCD
北大核心
1990年第3期228-232,共5页
Radiation Protection
