Hang Nguyen Thu, Sang Truong Thanh, Dat Nguyen Thanh, An Dang Hoai, Chuong Huynh Dinh, Tam Hoang Duc
Faculty of Physics, Ho Chi Minh City University of Education, Ho Chi Minh City, Viet Nam.
Nuclear Technique Laboratory, University of Science, Ho Chi Minh City, Viet Nam; Vietnam National University, Ho Chi Minh City, Viet Nam.
Appl Radiat Isot. 2022 Jul;185:110248. doi: 10.1016/j.apradiso.2022.110248. Epub 2022 Apr 17.
This work aims to develop a practical solution to measure the density of a liquid. Two purposes of this study: (1) using a low-activity source to measure the density of a liquid, and (2) simplifying the experimental arrangement to reduce the size and weight of the measuring system. The proposed solution is to develop a measurement technique without both detector and source collimators, while it considers an appropriate technique for analyzing the backscattering spectrum. To validate the proposed method, we used two groups of liquid: one group of liquids with a certified density and one group of liquids collected from the market. For the first group, the obtained results showed that the relative errors between the measured density and the reference one are below 6.8% and the uncertainties in density are below 4%, which confirms the feasibility of the proposed approach. For the second group, the liquids collected from the market include 70 percent alcohol, cooking oil, saltwater, fresh milk, diesel oil, dishwashing liquid, machine oil, and wine. The results obtained show that the relative errors between the densities determined by the proposed method and densities determined by the traditional method using density kit are less than 4.3%, the uncertainties in density when using the proposed method are below 3.2%. These results initially confirm that the proposed solution is completely applicable in measuring the density of a liquid.
这项工作旨在开发一种测量液体密度的实用解决方案。本研究有两个目的：（1）使用低活度源测量液体密度；（2）简化实验装置以减小测量系统的尺寸和重量。所提出的解决方案是开发一种无需探测器和源准直器的测量技术，同时考虑一种用于分析背散射谱的合适技术。为了验证所提出的方法，我们使用了两组液体：一组是具有认证密度的液体，另一组是从市场收集的液体。对于第一组，所获得的结果表明，测量密度与参考密度之间的相对误差低于6.8%，密度不确定度低于4%，这证实了所提方法的可行性。对于第二组，从市场收集的液体包括70%酒精、食用油、盐水、鲜牛奶、柴油、洗洁精、机油和葡萄酒。所获得的结果表明，所提方法测定的密度与使用密度计的传统方法测定的密度之间的相对误差小于4.3%，使用所提方法时密度的不确定度低于3.2%。这些结果初步证实所提出的解决方案完全适用于测量液体密度。
