scholarly journals Establishment of 350–450 kV wide spectrum and high air-kerma rate X-ray radiation mass

2019 ◽  
Vol 2019 (23) ◽  
pp. 8824-8828
Author(s):  
Bo Wang ◽  
Jinjie Wu ◽  
Haiyan Du ◽  
Siming Guo ◽  
Shiwei Ren
Keyword(s):  
Wide Spectrum ◽  
X Ray ◽  
Air Kerma ◽  
Air Kerma Rate

scholarly journals Effects of aluminum-copper alloy filtration on photon spectra, air kerma rate and image contrast

2004 ◽  
Vol 15 (3) ◽  
pp. 214-219 ◽  
Author(s):  
Andréa Gonçalves ◽  
João Manuel Domingos de Almeida Rollo ◽  
Marcelo Gonçalves ◽  
Francisco Haiter Neto ◽  
Frab Norberto Bóscolo
Keyword(s):  
Copper Alloy ◽  
Good Alternative ◽  
Image Contrast ◽  
X Ray ◽  
Air Kerma ◽  
Aluminum Copper Alloy ◽  
Aluminum Filter ◽  
Photon Spectra ◽  
Aluminum Filtration ◽  
Air Kerma Rate

This study evaluated the performance of aluminum-copper alloy filtration, without the original aluminum filter, for dental radiography in terms of x-ray energy spectrum, air kerma rate and image quality. Comparisons of various thicknesses of aluminum-copper alloy in three different percentages were made with aluminum filtration. Tests were conducted on an intra-oral dental x-ray machine and were made on mandible phantom and on step-wedge. Depending on the thickness of aluminum-copper alloy filtration, the beam could be hardened and filtrated. The use of the aluminum-copper alloy filter resulted in reductions in air kerma rate from 8.40% to 47.33%, and indicated the same image contrast when compared to aluminum filtration. Aluminum-copper alloy filtration may be considered a good alternative to aluminum filtration.

SU-CC-ValA-07: Air Kerma Rate Measurements From a Miniature X-Ray Source Using Free-Air Ionization Chambers

2006 ◽  
Vol 33 (6Part2) ◽  
pp. 1983-1984
Author(s):  
S Davis ◽  
J Micka ◽  
L DeWerd ◽  
T Rusch
Keyword(s):  
Ionization Chambers ◽  
X Ray ◽  
Air Kerma ◽  
Free Air ◽  
Air Ionization ◽  
Air Kerma Rate

Calculation of air-kerma rate of diagnostic X-ray generators

2010 ◽  
Vol 4 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Yoh Katoh ◽  
Sogo Mita ◽  
Masahiro Fukushi ◽  
Yoshiyuki Nyui ◽  
Shinji Abe ◽  
...  
Keyword(s):  
X Ray ◽  
Air Kerma ◽  
Air Kerma Rate

National primary standard of air kerma, air kerma rate, exposure, exposure rate and energy flux for X-rays and gamma radiation GET 8-2019

2020 ◽  
pp. 8-12
Author(s):  
Alexandr V. Oborin ◽  
Anna Y. Villevalde ◽  
Sergey G. Trofimchuk
Keyword(s):  
Gamma Radiation ◽  
Energy Flux ◽  
Primary Standard ◽  
Average Energy ◽  
Ion Pair ◽  
X Rays ◽  
Exposure Rate ◽  
Ionization Chambers ◽  
Air Kerma ◽  
Air Kerma Rate

The results of development of the national primary standard of air kerma, air kerma rate, exposure, exposure rate and energy flux for X-rays and gamma radiation GET 8-2011 in 2019 are presented according to the recommendations of the ICRU Report No. 90 “Key Data for Ionizing-Radiation Dosimetry: Measurement Standards and Applications”. The following changes are made to the equations for the units determination with the standard: in the field of X-rays, new correction coefficients of the free-air ionization chambers are introduced and the relative standard uncertainty of the average energy to create an ion pair in air is changed; in the field of gamma radiation, the product of the average energy to create an ion pair in air and the electron stopping-power graphite to air ratio for the cavity ionization chambers is changed. More accurate values of the units reproduced by GET 8-2019 are obtained and new metrological characteristics of the standard are stated.

New Principles of the Substructure Development in Metal Materials under Plastic Deformation, Revealed by Advanced X-Ray Methods

2004 ◽  
Vol 443-444 ◽  
pp. 259-262 ◽  
Author(s):  
Yuriy Perlovich ◽  
Margarita Isaenkova
Keyword(s):  
Wide Spectrum ◽  
Residual Deformation ◽  
Ray Method ◽  
Computer Data ◽  
Rolled Material ◽  
X Ray ◽  
Pole Figures ◽  
Metal Materials ◽  
First Time ◽  
Ray Methods

The substructure inhomogeneity of real textured metal materials was studied by use of the X-ray method of Generalized Pole Figures and the computer data treatment. Main regularities of substructure inhomogeneity were revealed for the first time. Substructure conditions of grains in rolled material form an extremely wide spectrum and vary by passing from texture maxima to texture minima, where residual deformation effects are most significant. The distribution of residual elastic microstrains in the orientational space of rolled material shows the distinct system.

THE AIR-KERMA RATE CONSTANT: APPLICATION TO AIR-KERMA MEASUREMENTS FOR HOMELAND SECURITY

2008 ◽  
Vol 94 (2) ◽  
pp. 126-133
Author(s):  
L Pibida ◽  
R Minniti ◽  
L Lucas ◽  
S M. Seltzer
Keyword(s):  
Rate Constant ◽  
Homeland Security ◽  
Air Kerma ◽  
Air Kerma Rate

scholarly journals SYNTHESIS OF ZnO-Аg NANOPARTICLES BY SOL-GEL METHOD

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Savka Janković ◽  
Dragana Milisavić ◽  
Tanja Okolić ◽  
Dijana Jelić
Keyword(s):  
Zno Nanoparticles ◽  
Wide Spectrum ◽  
Sol Gel ◽  
Synthesis Method ◽  
Material Surface ◽  
Characterization Methods ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Doped Zno

Zinc oxide is a highly applicable semiconductor material. Wide applica-tion of this nanomaterial is connected to wide spectrum of energy band gap, high bond en-ergy, great thermal conductivity, but also with its non-toxicity, antibacterial activity, bio-compatibility and biodegradability characteristics. The aim of this paper is synthesis and characterization of silver doped ZnO nanoparticles (ZnO:Ag NP) using sol-gel method. Ob-tained samples of silver doped ZnO nanoparticles were characterized by following tech-niques: Fourier-transform infrared spectroscopy (FTIR), UV/VIS spectrophotometry, X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spec-troscopy (EDX). Efficiency of provided synthesis method was examined by FTIR spectros-copy. XRD determined the purity and crystallinity, and wurtzite structure of synthesized material. Surface morphology and the effect of doping were examined using SEM and EDX characterization methods. Results showed better conductivity after doping ZnO nanoparti-cles with silver. SEM micrographs showed ZnO:Ag NP in the form of nanorods with a par-ticle average size of 6 nm.

scholarly journals PO-0969: Air kerma rate measurements for Ir-192 and Co-60 HDR sources using three different international protocols

2013 ◽  
Vol 106 ◽  
pp. S374-S375
Author(s):  
F.W. Hensley ◽  
H.A. Azhari ◽  
W. Schütte ◽  
G.A. Zakaria
Keyword(s):  
Air Kerma ◽  
Air Kerma Rate
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