Hegyi G, Richardson R B
Department of Medical Physics, Room L5-112, McGill University Health Center, Montréal, Que, Canada H3G 1A4.
Radiat Prot Dosimetry. 2008;130(4):466-75. doi: 10.1093/rpd/ncn071. Epub 2008 Mar 12.
Theoretical and experimental methods were developed to assess the size distribution of alpha-emitting particles captured on air-sampler filters. The particle size of oxides of low enriched, depleted and natural uranium and also aged plutonium in mixed oxide reactor fuels of known composition was determined using poly-allyl-diglycol carbonate (PADC) autoradiography, the commercial product TASTRAK((R)), solid-state nuclear track detectors. The exposed PADC was chemically etched to reveal clusters of tracks, radially dispersing from central points. A theoretical model was developed which converted the number of tracks in a track cluster to the hot particle diameter. The diameters of 26 particles of natural uranium oxide were measured (4-130 microm) using an optical microscope. There was a good agreement between these particle size measurements and a theoretical assessment based on the track cluster count.
已开发出理论和实验方法来评估在空气采样器滤膜上捕获的发射α粒子的颗粒大小分布。使用聚烯丙基二甘醇碳酸酯（PADC）放射自显影法（一种商用产品TASTRAK®，固态核径迹探测器），测定了已知成分的混合氧化物反应堆燃料中低浓铀、贫铀和天然铀氧化物以及老化钚的颗粒大小。对曝光后的PADC进行化学蚀刻，以显示从中心点径向分散的径迹簇。开发了一个理论模型，该模型将径迹簇中的径迹数量转换为热粒子直径。使用光学显微镜测量了26个天然铀氧化物颗粒的直径（4 - 130微米）。这些颗粒大小测量结果与基于径迹簇计数的理论评估结果吻合良好。
