scholarly journals Photon attenuation parameters of non-essential amino acids using EPICS2017 library interpolations

2021 ◽  
Vol 3 (5) ◽  
Author(s):  
A. M. V. Javier-Hila ◽  
B. C. V. Javier ◽  
F. C. Hila ◽  
N. R. D. Guillermo
Keyword(s):  
Amino Acids ◽  
Monte Carlo ◽  
Essential Amino Acids ◽  
Electron Densities ◽  
Attenuation Coefficients ◽  
Photon Attenuation ◽  
Mass Attenuation Coefficients ◽  
Effective Atomic Numbers ◽  
Buildup Factors ◽  
Mass Attenuation

AbstractMass attenuation coefficients, effective atomic numbers, electron densities and energy absorption and exposure buildup factors for the non-essential and conditionally non-essential amino acids including alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine have been acquired using the latest evaluated photoatomic library of EPICS2017. The library was used by constructing an interpolation script that calculates for all photon attenuation parameters. Comparisons were made using alternative Monte Carlo simulation results for 15 energy points from 59.5 to 1333 keV, and in contrast with experimental works in literature. Good agreements for the mass attenuation coefficients were observed between EPICS2017-based values compared with Monte Carlo code and experimental results. Similar trends for the effective atomic numbers and electron densities were observed from EPICS2017 interpolation and from results found in literature. Conversely, buildup factors acquired by Geometric-Progression fitting parameters were reported in this work preliminarily for most of these biomolecules at different penetration depths. Overall, cysteine showed the most significant deviation among the other non-essential amino acids due to the presence of sulfur in its molecular structure.

Determination of effective atomic numbers and electron densities for some synthesized triazoles from the measured total mass attenuation coefficients at different energies

2019 ◽  
Vol 97 (1) ◽  
pp. 86-92 ◽  
Author(s):  
F. Akman ◽  
I.H. Geçibesler ◽  
I. Demirkol ◽  
A. Çetin
Keyword(s):  
Total Mass ◽  
Effective Atomic Number ◽  
Electron Densities ◽  
Atom Number ◽  
Attenuation Coefficients ◽  
Effective Electron ◽  
Mass Attenuation Coefficients ◽  
Effective Atomic Numbers ◽  
Theoretical Results ◽  
Mass Attenuation

The effective atomic numbers and electron densities of some synthesized triazoles were determined using the experimental values of total mass attenuation coefficients at 13.93, 17.77, 26.34, and 59.54 keV photon energies. The measurements were performed in a transmission geometry that consists of a Si(Li) detector, an 241Am point source and a target. The measured results were compared with two different theoretical results. The measured results are generally consistent with the theoretical results. It is observed that the measured parameters depend on the photon energy, weighted contributions of the individual atoms within the triazoles, atom number in the triazoles, and chemical composition of triazoles. Also, the effective electron density increases linearly with increasing effective atomic number.

Photon mass attenuation coefficients, effective atomic numbers and electron densities of some thermoluminescent dosimetric compounds

Pramana ◽  
2004 ◽  
Vol 63 (3) ◽  
pp. 529-541 ◽  
Author(s):  
Shivalinge Gowda ◽  
S. Krishnaveni ◽  
T. Yashoda ◽  
T. K. Umesh ◽  
Ramakrishna Gowda
Keyword(s):  
Photon Mass ◽  
Electron Densities ◽  
Attenuation Coefficients ◽  
Mass Attenuation Coefficients ◽  
Effective Atomic Numbers ◽  
Mass Attenuation

scholarly journals The Mass Attenuation Coefficients, Electronic, Atomic, and Molecular Cross Sections, Effective Atomic Numbers, and Electron Densities for Compounds of Some Biomedically Important Elements at 59.5 keV

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Burcu Akça ◽  
Salih Z. Erzeneoğlu
Keyword(s):  
Cross Sections ◽  
Relative Difference ◽  
Electron Densities ◽  
Transmission Method ◽  
Attenuation Coefficients ◽  
Mass Attenuation Coefficients ◽  
Effective Atomic Numbers ◽  
Beam Transmission ◽  
Fluorescence Spectrometer ◽  
Mass Attenuation

The mass attenuation coefficients for compounds of biomedically important some elements (Na, Mg, Al, Ca, and Fe) have been measured by using an extremely narrow collimated-beam transmission method in the energy 59.5 keV. Total electronic, atomic, and molecular cross sections, effective atomic numbers, and electron densities have been obtained by using these results. Gamma-rays of241Am passed through compounds have been detected by a high-resolution Si(Li) detector and by using energy dispersive X-ray fluorescence spectrometer (EDXRF). Obtained results have been compared with theoretically calculated values of WinXCom and FFAST. The relative difference between the experimental and theoretical values are −9.4% to +11.9% with WinXCom and −11.8% to +11.7% FFAST. Results have been presented and discussed in this paper.

scholarly journals Determination of effective atomic numbers and electron densities from mass attenuation coefficients for some selected complexes containing lanthanides

2017 ◽  
Vol 95 (10) ◽  
pp. 1005-1011 ◽  
Author(s):  
Ferdi Akman ◽  
Mustafa Recep Kaçal ◽  
Feride Akman ◽  
Mustafa Serkan Soylu
Keyword(s):  
Chemical Parameters ◽  
Electron Densities ◽  
Attenuation Coefficients ◽  
Transmission Geometry ◽  
Mass Attenuation Coefficients ◽  
Effective Atomic Numbers ◽  
Theoretical Results ◽  
Good Agreement ◽  
Mass Attenuation

The effective atomic numbers and electron densities for the pure elemental forms of gadolinium (Gd), dysprosium (Dy), erbium (Er), and ytterbium (Yb), and some of their selected complexes, were obtained from the measured total mass attenuation coefficients at 13.92, 17.75, 20.78, 26.34, and 59.54 keV photon energies using a high-resolution Si(Li) detector by adopting transmission geometry. The measured results were compared with two different theoretical results. Within experimental deviations, our data are in good agreement with the theoretical values. The obtained parameters were also interpreted with some selected chemical parameters.

Effective Atomic Numbers and Electron Densities of BaO-Na2O-B2O3-SiO2 Glass System: Theoretical Calculation

2016 ◽  
Vol 675-676 ◽  
pp. 331-334
Author(s):  
N.W. Sangwaranatee ◽  
Narong Sangwaranatee ◽  
S. Sarachai ◽  
Suparat Tuscharoen ◽  
Jakrapong Kaewkhao
Keyword(s):  
Theoretical Calculation ◽  
Glass System ◽  
Electron Densities ◽  
Attenuation Coefficients ◽  
Effective Electron ◽  
Result Show ◽  
Mass Attenuation Coefficients ◽  
Effective Atomic Numbers ◽  
Glass Matrices ◽  
Mass Attenuation

In this work, the mass attenuation coefficients, the effective atomic numbers and the effective electron densities of BaO-Na2O-B2O3-SiO2 glass have been studied at 662 keV using WinXCom program. The result show that the mass attenuation coefficients increased with increasing of BaO concentration, reflecting that more photon is attenuated. The effective atomic numbers and the effective electron densities are similar trend with mass attenuation coefficients, reflecting that more virtual electron when higher BaO concentration and more interaction will be occurred in glass matrices.

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