scholarly journals Integrated and Portable Probe Based on Functional Plastic Scintillator for Detection of Radioactive Cesium

2021 ◽  
Vol 11 (11) ◽  
pp. 5210
Author(s):  
Sujung Min ◽  
Hara Kang ◽  
Bumkyung Seo ◽  
Changhyun Roh ◽  
Sangbum Hong ◽  
...  
Keyword(s):  
Plastic Scintillator ◽  
Detection Efficiency ◽  
Direct Detection ◽  
Detection System ◽  
Light Yield ◽  
Radioactive Cesium ◽  
Radiological Measurement ◽  
Measurement Experiment ◽  
In Situ Detection

The highly reliable and direct detection of radioactive cesium has gained potential interest due to in-situ detection and monitoring in environments. In this study, we elucidated an integrated and portable probe based on functional plastic scintillator for detection of radioactive cesium. A functional plastic scintillator with improved detection efficiency was fabricated including CdTe (cadmium telluride) material. Monolith-typed functional plastic scintillator having a diameter of 50 mm and a thickness of 30 mm was manufactured by adding 2,5-diphenyloxazole (PPO, 0.4 wt%), 1,4 di[2-(5phenyloxazolyl)]benzene (POPOP, 0.01 wt%), and CdTe (0.2 wt%) materials in a styrene-based matrix. To evaluate the applicability of the plastic scintillator manufactured to in-situ radiological measurement, an integrated plastic detection system was created, and the measurement experiment was performed using the Cs-137 radiation source. Additionally, detection efficiency was compared with a commercial plastic scintillator. As results, the efficiency and light yield of a functional plastic scintillator including CdTe were higher than a commercial plastic scintillator. Furthermore, the remarkable performance of the functional plastic scintillator was confirmed through comparative analysis with Monte Carlo simulation.

scholarly journals Real Time In-situ Detection System Research for Methane in Offshore Shallow Gas based on Thin Film Interface

2018 ◽  
Vol 232 ◽  
pp. 04053
Author(s):  
Cheng-xing Miao ◽  
Qing Li ◽  
Sheng-yao Jia
Keyword(s):  
Real Time ◽  
Detection Efficiency ◽  
Detection System ◽  
Detection Methods ◽  
Shallow Gas ◽  
Micro Gas Sensor ◽  
Detection Probe ◽  
On Line ◽  
In Situ Detection

In order to get ridded of the non real-time detection methods of artificial site sampled and laboratory instrument analyzed in the field of methane detection in the offshore shallow gas, real-time in-situ detection system for methane in offshore shallow gas was designed by the film interface.The methane in the offshore shallow gas through the gas-liquid separation membrane of polymer permeation into the system internal detection probe, analog infrared micro gas sensor sensed the methane concentration and the corresponded output value, data acquisition and communication node fitted into standard gas concentration.Based on the experimental data compared with the traditional detection method, and further analyzed the causes of error produced by the case experiment. The application results show that the system can achieve a single borehole layout, long-term on-line in-situ on-line detection, and improve the detection efficiency and the timeliness of the detection data.

scholarly journals Wireless Backpack System for Detection of Radioactive Cesium on Contaminated Soil Using Portable Plastic Scintillator with Efficient Readout Device

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2833
Author(s):  
Sujung Min ◽  
Kwang-Hoon Ko ◽  
Bumkyung Seo ◽  
JaeHak Cheong ◽  
Changhyun Roh ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Plastic Scintillator ◽  
Detection Efficiency ◽  
Detection System ◽  
Radiation Detectors ◽  
Radioactive Cesium ◽  
Efficiency Performance ◽  
Portable System ◽  
Gamma Radiations ◽  
Wireless System Design

The miniaturization and usability of radiation detectors make it increasingly possible to use mobile instruments to detect and monitor gamma radiations. Here, a Bluetooth-based mobile detection system for integrated interaction in a backpack was designed and implemented to smart equipment for the detection of radioactive cesium on contaminated soil. The radiation measurement system was demonstrated in the form of a backpack using a quantum dot (QD)-loaded plastic scintillator manufactured and prepared directly in this study, and it can be measured by a person in the wireless framework of integrated interaction. The QD-loaded plastic scintillator was measured after setting the distance from the contaminated soil to 20, 50, and 100 mm. As a result, the detection efficiency of the commercial plastic scintillator (EJ-200) was calculated to be 11.81% and that of the QD-loaded plastic scintillator was 15.22%, which proved the higher detection efficiency performance than the commercial plastic scintillator. The measurement result was transmitted to a personal computer using Bluetooth as a portable system. In the future, this wireless system design could be expanded as a wireless communication system equipped with a global positioning system to detect and measure radioactively contaminated environments.

DESIGN OF AN IN SITU DETECTION SYSTEM FOR LASER HARDENED WIDTH

2011 ◽  
Author(s):  
CAIXIA YANG ◽  
JICHANG LIU
Keyword(s):  
Detection System ◽  
In Situ Detection

Implementation of seafloor heat-flux in-situ detection system based on MEMS

2014 ◽  
Author(s):  
Tao Wang ◽  
Qian Zhao ◽  
Cungen Liu
Keyword(s):  
Heat Flux ◽  
Detection System ◽  
In Situ Detection

Multiple Phage-Based Magnetoelastic Biosensors System for the Detection of Salmonella typhimurium and Bacillus anthracis Spores

2008 ◽  
Vol 1129 ◽  
Author(s):  
S. Huang ◽  
S. Li ◽  
H. Yang ◽  
M. L. Johnson ◽  
Ramji S Lakshmanan ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Rapid Detection ◽  
Detection System ◽  
Additional Mass ◽  
Response Curves ◽  
Biosensor System ◽  
Bacillus Anthracis Spores ◽  
In Situ Detection ◽  
Multiple Pathogens

AbstractThis paper presents a multiple magnetoelastic (ME) biosensor system for in-situ detection of S. typhimurium and B. anthracis spores in a flowing bacterial/spore suspension (5 x 101 - 5 x 108 cfu/ml). The ME biosensor was formed by immobilizing filamentous phage (specific to each detection target) on the ME platforms. An alternating magnetic field was used to resonate the ME biosensor to determine its resonance frequency. When cells/spores are bound to a ME biosensor surface, the additional mass of the cells/spores causes a decrease in the resonance frequency of the biosensor. The detection system was composed of a control sensor, an E2 phage-based biosensor (specific to S. typhimurium) and a JRB7 phage-based biosensor (specific to B. anthracis spores). The frequency response curves of the ME biosensors as a function of exposure time were then measured and the detection limit of the ME biosensor was observed to be 5 x 103 cfu/ml. The results show that phage-based ME biosensors can detect multiple pathogens simultaneously and offer good performance, including good sensitivity and rapid detection.

scholarly journals Determination of in situ detection efficiency for IM-NAA of non-standard geometrical samples

2021 ◽  
Vol 9 (4) ◽  
pp. 27-33
Author(s):  
Duy Quang Nguyen ◽  
Van Cuong Trinh ◽  
Tuan Anh Tran ◽  
Van Doanh Ho ◽  
Thi Tho Nguyen ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Detection Efficiency ◽  
Standard Geometry ◽  
Activation Products ◽  
Geometrical Effects ◽  
In Situ Detection ◽  
Relative Detection

The k0-based internal mono-standard (IM) method was first proposed for the concentration analysis of samples of non-standard geometry in the 2000s. The method has demonstrated several advantages such as the elimination of gamma-ray self-attenuation and geometrical effects. On the other hand, the accuracy of the method principally depends on the in situ relative detection efficiency, which requires to be obtained in each measurement. Therefore, the relative detection efficiency is always under consideration for the improvement of the analysis results. The present paper describes a simple and automatic procedure for the determination of the relative efficiency using one or more activation products emitting gamma rays over a considered range of the spectrum. The procedure can be applied for INAA and PGNAA analysis.

An autonomous in situ detection system for radioactivity measurements in the marine environment

2008 ◽  
Vol 66 (10) ◽  
pp. 1419-1426 ◽  
Author(s):  
C. Tsabaris ◽  
C. Bagatelas ◽  
Th. Dakladas ◽  
C.T. Papadopoulos ◽  
R. Vlastou ◽  
...  
Keyword(s):  
Marine Environment ◽  
Detection System ◽  
In Situ Detection ◽  
Radioactivity Measurements
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