切尔诺贝利事故释放的²⁴¹Pu衰变产生的环境中随时间变化的²⁴¹Am活度。

Time-dependent 241Am activity in the environment from decay of 241Pu released in the Chernobyl accident.

作者信息

Muravitsky A V, Razbudey V F, Tokarevsky V V, Vorona P N

机构信息

State Scientific Engineering Centre for Control Systems and Emergency Response, 64/56, Geroiv Stalingrada, 04213 Kyiv, Ukraine.

出版信息

Appl Radiat Isot. 2005 Oct;63(4):487-92. doi: 10.1016/j.apradiso.2005.03.018.

DOI:10.1016/j.apradiso.2005.03.018

PMID:16046263

Abstract

The time-dependent activity of the alpha-emitting radionuclide 241Am, resulting from beta-decay of 241Pu present in the accidental release from Unit 4 of the Chernobyl NPP, has been studied. The ratios of the activity of 241Pu to those of 239, 240Pu and of 238, 239, 240Pu at the time of the accident have been derived as 69.6+0.6 and 47.1+0.4, respectively. Based on these results, a prediction of the future activity ratio 241Am/238,239,240Pu has been made, showing that it will increase slowly to the value 1 in the year 2005 and to a maximum value of 1.7 at the end of this century, followed by a gradual decrease.

摘要

对切尔诺贝利核电站4号机组意外释放中存在的241Pu经β衰变产生的发射α粒子放射性核素241Am的时间依赖性活度进行了研究。已得出事故发生时241Pu与239、240Pu以及238、239、240Pu活度的比值分别为69.6±0.6和47.1±0.4。基于这些结果，对未来241Am/238、239、240Pu的活度比值进行了预测，结果表明该比值将在2005年缓慢增加至1，并在本世纪末达到最大值1.7，随后逐渐下降。