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Sep 11, 2020Open    AccessArticle

Simulation of X-Ray Shielding Effect of Different Materials Based on MCNP5

Fanying Zhang, Xiaogang Zhao, Junxin Zhang
This article uses the Monte Carlo method and MCNP5 software to first simulate the X-ray energy spectrum of the tungsten target and the silver target. On this basis, using lead, tungsten and tungsten alloys (90% tungsten, 7.1% nickel, and iron 2.9%) as an X-ray shielding material, the shielding efficiency of these three materials at different thicknesses is calculated, and the results show that tungsten and tungsten alloy have better shielding effect than lead. For the X-rays of different energie...
Open Access Library J. Vol.7, 2020
Doi:10.4236/oalib.1106727


Aug 25, 2020Open    AccessArticle

Evaluation of Indoor Environmental Radiation Level and Radiation Dose in Student Dormitory

Yu Liu, Xu Zhao, Junxin Zhang
A large number of studies have shown that indoor radiation can damage our digestive organs, reproductive system, hematopoietic system and nervous system. In this topic, aiming to master the indoor environmental radioactivity level and the levels of radiation, the feasibility experiment plans with both appropriate measuring method and measuring instrument are designed to measure γ-radiation dose rate and Radon concentration of student dorm actually. Meanwhile, the radiation dose of students can b...
Open Access Library J. Vol.7, 2020
Doi:10.4236/oalib.1106673


Aug 25, 2020Open    AccessArticle

Total Reflection X-Ray Fluorescence Spectroscopy

Tibo Yang, Xinyang Fan, Jinge Zhou
Total reflection X-ray fluorescence (TXRF) is widely used in trace elements, ultra-trace element, and multi-element analysis due to its low detection limit and low energy spectrum background count. This article studies the development and application of TXRF. The development of TXRF can be divided into three stages. The first stage: Total reflection was first presented in 1971 to the publication of the first monograph about TXRF in 1997, mainly the theoretical research of TXRF and the applicatio...
Open Access Library J. Vol.7, 2020
Doi:10.4236/oalib.1106671


Aug 24, 2020Open    AccessArticle

High-Pressure Xenon Detector in Nuclear Radiation Measurement System

Xinyang Fan, Tibo Yang
With its excellent energy resolution and good temperature characteristics, high-pressure xenon detectors are widely used in extreme measurement environments such as high temperature and strong radiation. However, the energy resolution of the energy spectrum of the high-pressure xenon detector will be reduced or even distorted in a high-decibel noise environment. In order to better understand the noise sensitivity of high-pressure xenon detectors, this paper summarizes and analyzes the principle,...
Open Access Library J. Vol.7, 2020
Doi:10.4236/oalib.1106690


Aug 21, 2020Open    AccessArticle

Investigation of Radioactive Environment in Open Park in a City

Xu Zhao, Yu Liu, Qiushi Liu
Urban parks provide citizens with fitness and leisure space, and their radioactivity affects every surrounding resident. In this paper, seven typical open parks in a city were selected and 350 measuring points were arranged in total, where the field gamma air radiation absorbed dose rate was measured by a portable X-gamma dosimeter. The results show that the surface gamma radiation absorbed dose rate of air ranges from 73.0 nGy/h - 140.0 nGy/h, and the average value ranges from 96.0 nGy/h - 113....
Open Access Library J. Vol.7, 2020
Doi:10.4236/oalib.1106678


Aug 21, 2020Open    AccessArticle

Comparative Study on Peak-Seeking Methods of the Mixed Radioactive Energy Spectrum

Rui Luo, Yao Huang, Xianghe Liu
The Geant4 software is used to simulate the CsI detector to measure the mixed energy spectrum from three radionuclides in the nuclear waste barrel. In this paper, a variety of methods are used to perform peak-seeking analysis on the mixed energy spectrum generating from 60Co, 137Cs and 226Ra, the effects of each peak-seeking method are compared for this complex energy spectrum. In this comparative experiment, the results show that the morphological energy spectrum peak-seeking method is more sui...
Open Access Library J. Vol.7, 2020
Doi:10.4236/oalib.1106676


Aug 21, 2020Open    AccessArticle

Monte Carlo Simulation of Angular Response Function of Airborne Gamma Spectrometer

Qianyin Wan, Yaohan Hu, Ruiyang Xu, Qiushi Liu
The angular response function F(θ, φ) is used as an airborne gamma spectrometer to measure the basic physical quantity of the contribution of each nuclide to the total dose rate by the all-energy peak method, which is facing the difficulty of experimental calibration. In this paper, the Monte Carlo program MCNP5 is used to calculate the full-energy peak angle response function F(θ, φ) of a single NaI(Tl) crystal (40 cm × 10 cm × 5 cm) to Cs-137. It has been verified that when the point source is...
Open Access Library J. Vol.7, 2020
Doi:10.4236/oalib.1106638


Aug 20, 2020Open    AccessArticle

MC Simulates the Detection Efficiency of Different Sizes of BaClBr(Eu)

Junxin Zhang, Yifan Jin, Xu Zhao, Qiushi Liu, Ruiyang Xu, Yu Liu
The performance of a new BaClBr(Eu) scintillator discovered in recent years was studied. The photon yield and detection efficiency of different sizes of the theoretical model of the BaClBr(Eu) detector were calculated by the MCNP program, and compared with the traditional NaCl(Tl) detector. Studies have found that the detection efficiency of the scintillator detector increases as the size of the scintillator increases. When the γ-ray energy is 662 KeV, the photon yield of the BaClBr(Eu) detector...
Open Access Library J. Vol.7, 2020
Doi:10.4236/oalib.1106655


Aug 20, 2020Open    AccessArticle

Experimental Research on the Influencing Factors of Radon Concentration Measurement in Soil

Yifan Jin, Junxin Zhang, Qiushi Liu
Radon is the most accessible radioactive gas in life. The radon in ambient air mainly comes from the soil. In order to ensure the accuracy and validity of the measurement of radon concentration in the soil, the paper discusses the influencing factors of the measurement of radon concentration in the soil through the controlled variable method. On the basis of familiarity with the principle of measuring the concentration of radon in the soil, using the radon meter to study the influence of the mea...
Open Access Library J. Vol.7, 2020
Doi:10.4236/oalib.1106657


Aug 20, 2020Open    AccessArticle

Investigation and Analysis of Soil Radioactivity Level in Parks in a City

Qiushi Liu, Ruiyang Xu, Yaohan Hu
Using a portable microcomputer multi-channel gamma spectrometer to directly measure the radioactive content in the soil, the on-site gamma energy spectrum measurement was carried out on the soil of 7 parks in a certain city. The survey results show that the specific activity of 40k in the urban park soil ranges from 470.88 bq/kg to 640.2 bq/kg. The specific activity of 238u ranges from 26.77 bq/kg to 33.31 bq/kg. The specific activity of 232th ranges from 42.14 bq/kg to 54.72 bq/kg. The content ...
Open Access Library J. Vol.7, 2020
Doi:10.4236/oalib.1106656


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