Development of an inexpensive screening radiation detector for confidence in food

在大范围辐射污染之后，需要对食品有信心。在这项研究中，一个廉价的辐射探测器测量放射性的零售商店和/或直销农民。这种探测器的设计充分利用了食物本身的自屏蔽作用。假设CsI（Tl）闪烁体的尺寸为1.25 × 1.25 × 3.0 cm ^3，发现对于5 kg大米，在22分钟内达到50 Bq/kg的筛选水平。此外，仅用几分钟就确定放射性低于100 Bq/kg。

Confidence in food was required after broad area radiation contamination caused by nuclear accident in the Fukushim Daiichi nuclear power plant. In this study, an inexpensive radiation detector measuring radioactivity for retail shops and/or direct marketing farmers. This detector was designed to made best use of self-shielding of food itself. In size of 1.25 x 1.25 x 3.0 cm^3 of CsI(Tl) scintillator was assumed, and it was reveled to achieve screening level of 50 Bq/kg within 22 minute for rice in 5 kg. In addition, it took only several minutes to determine that radioactivity is lower than 100 Bq/kg.