Results 21 to 30 of about 321,405 (167)

Development of high-temperature heavy density dolerite concrete for 4th generation nuclear power plants

Frontiers in Materials, 2023
This study examines the physical, mechanical, microstructural, and attenuation properties of high-density concrete exposed to temperatures ranging from 200°C to 1200°C.
Muhammad Nasir Ayaz Khan, Azhar Hussain Malik, Muhammad Yaqub, Muhammad Umar, Muhammad Noman, Muhammad Abid, Hisham Alabduljabbar, Abdullah Mohamed, Syed Salman Ahmad Zaidi   +8 more
doaj   +1 more source

Methodology study for determining the half-value layer using the Monte Carlo code PHITS

Brazilian Journal of Radiation Sciences
For most purposes, the quality of a beam can be specified in terms of the half-value layer (HVL), which is the thickness of material required to reduce the air kerma  to half, at one meter from the source, from a unidirectional beam of infinitesimal ...
Ronald Soares, Marco Aurélio Lacerda
doaj   +1 more source

Half-value layer measurement: simple process method using radiochromic film [PDF]

Australasian Physics & Engineering Sciences in Medicine, 2009
Although the half-value layer (HVL) is one of the important parameters for QA and QC, constant monitoring has not been performed because the measurements using an ionization chamber (IC) are time-consuming and complicated. To solve these problems, the use of radiochromic film (GAFCHROMIC XR TYPE R: GAF-R) with step-shaped aluminum (Al) filters ...
T, Gotanda, T, Katsuda, R, Gotanda, A, Tabuchi, K, Yamamoto, T, Kuwano, H, Yatake, K, Kashiyama, Y, Takeda   +8 more
openaire   +2 more sources

Comparison of X-Ray Attenuation Performance, Antimicrobial Properties, and Cytotoxicity of Silicone-Based Matrices Containing Bi2O3, PbO, or Bi2O3/PbO Nanoparticles [PDF]

Journal of Biomedical Physics and Engineering
Background: Application of the nanomaterials to preparing X-ray shields and successfully treating multiresistant microorganisms has attracted great attention in modern life.Objective: This study aimed to prepare flexible silicone-based matrices ...
Baharak Divband, Zahraa Haleem Al-qaim, Falah H. Hussein, Davood Khezerloo, Nahideh Gharehaghaji   +4 more
doaj   +1 more source

Correction of the Contribution of Scattered Photon Radiation to the Ionization Chamber Readings During X-Ray Radiation Quality Assessment

Приборы и методы измерений, 2022
Reduction of the systematic error when determining the characteristics of the reference X-ray radiation fields is an essential task according to the ISO 4037-1:2019 standard.
A. A. Zaharadniuk, K. G. Senkovsky, R. V. Lukashevich   +2 more
doaj   +1 more source

Fast neutrons and gamma rays shielding properties for some nylon composite [PDF]

E3S Web of Conferences
In this study, The removal parameters of macroscopic fast neutron cross-section, linear gamma ray attenuation, mean free path, and half-value layer (half-value thickness) were calculated for a polymer composite containing nylon 6 as a base material and ...
Kareem Dawood Salwah, Ghali Ishnayyin Hadeel, Fadhil Mkhaiber Ahmed, Hatim Naseef Hadia   +3 more
doaj   +1 more source

Artificial semi-rigid tissue sensitized with natural pigments: Effect of photon radiations

Journal of Pharmacy and Bioallied Sciences, 2011
Background: A new approach for evaluating the optical penetration depth and testing its validity with Monte Carlo simulations and Kubelka-Munk theory is used for artificial semi-rigid tissue sensitized with natural pigments.
Adnan Jaradat, M-Ali H Al-Akhras, G Makhadmeh, K Aljarrah, A Al-omari, Z Ababneh, Majed M Masadeh, H M Al-Khateeb, B A Albiss, M Alshorman   +9 more
doaj   +1 more source

Measurement and Research of Intrinsic Filtering of X-Ray Optical Machine

Journal of Isotopes, 2021
The thickness of the inherent filter layer is one of the important performance parameters of the X-ray reference radiation device, and it needs to be quantitatively measured. This research is based on the new version of ISO 4037-1 standard specification,
HANG Zhongbin;LIU Chuanfeng;LIU Yuntao;WEI Kexin;SONG Mingzhe;WANG Hongyu
doaj   +1 more source

EVALUATION OF BRACHYTHERAPY FACILITY SHIELDING STATUS IN KOREA OBTAINED FROM RADIATION SAFETY REPORTS

Nuclear Engineering and Technology, 2013
Thirty-eight radiation safety reports for brachytherapy equipment were evaluated to determine the current status of brachytherapy units in Korea and to assess how radiation oncology departments in Korea complete radiation safety reports.
MI HYUN KEUM, SUNG HO PARK, SEUNG DO AHN, WOON-KAP CHO   +3 more
doaj   +1 more source

Enhanced radiation shielding with galena concrete [PDF]

Nuclear Technology and Radiation Protection, 2015
A new concrete, containing galena mineral, with enhanced shielding properties for gamma sources is developed. To achieve optimized shielding properties, ten types of galena concrete containing different mixing ratios and a reference normal ...
Hadad Kamal, Majidi Hosein, Sarshough Samira   +2 more
doaj   +1 more source