论文标题
从变化和尺寸的灰尘散发出ra散发
Radon Emanation from Dust of Varying Composition and Size
论文作者
论文摘要
$^{222} rn $从环境灰尘中发出是许多低能，低速率实验的重要背景组件。因此，灰尘和岩石的ra散发速率对于实验计划很重要。在本文中，我们报告了五种类型的干尘的测得的ra散发部分，粒度和成分不同。这些数据是通过$γ$ - 光谱镜检查中的一种新技术获得的，测量了发射和非交汇的$^{222} rn $后代活动以及父母$^{226} $ ra活动在时间序列中。观察到的ra散发部分的范围为$（3.7 \ pm 2.0）\％$至$（16.2 \ pm 0.9）\％$。这五个样本中有四个是商业上可用的标准样品，因此可以很容易地对这些样品进行其他研究。
$^{222}Rn$ emanating from environmental dust constitutes an important background component for many low-energy, low-rate experiments. Radon emanation rates from dust and rock, thus, are important for experiment planning. In this paper, we report measured radon emanation fractions for five types of dry dust differing in grain size and composition. These data were obtained by a novel technique in $γ$-spectroscopy, measuring emanated and non-emanated $^{222}Rn$ progeny activities as well as the the parent $^{226}$Ra activity in a time series. The range of observed radon emanation fractions is $(3.7 \pm 2.0)\%$ to $(16.2 \pm 0.9)\%$. Four of the five samples are standardized samples available commercially, so additional investigations of these samples may be readily carried out.
