A comparison study for mass attenuation coefficients of some amino acids using MCNP code

Kerntechnik ◽  
2017 ◽  
Vol 82 (3) ◽  
pp. 339-343 ◽  
Author(s):  
S. M. Vahabi ◽  
M. Bahreinipour ◽  
M. Shamsaie-Zafarghandi
Keyword(s):  
Amino Acids ◽  
Comparison Study ◽  
Mcnp Code ◽  
Attenuation Coefficients ◽  
Mass Attenuation Coefficients ◽  
Mass Attenuation

Determining the mass attenuation coefficients for some polymers using MCNP code: A comparison study

Vacuum ◽  
2017 ◽  
Vol 136 ◽  
pp. 73-76 ◽  
Author(s):  
Seyed Milad Vahabi ◽  
Mostean Bahreinipour ◽  
Mojtaba Shamsaie Zafarghandi
Keyword(s):  
Comparison Study ◽  
Mcnp Code ◽  
Attenuation Coefficients ◽  
Mass Attenuation Coefficients ◽  
Mass Attenuation

scholarly journals Photon Atomic Parameters of Nonessential Amino Acids for Radiotherapy and Diagnostics

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Ertuğrul O. Bursalıoğlu ◽  
Orhan İçelli ◽  
Begüm Balkan ◽  
H. Birtan Kavanoz ◽  
Mustafa Okutan
Keyword(s):  
Amino Acids ◽  
Cross Sections ◽  
Total Mass ◽  
Attenuation Coefficients ◽  
Wide Energy ◽  
Mass Attenuation Coefficients ◽  
Photon Interactions ◽  
Nonessential Amino Acids ◽  
Atomic Parameters ◽  
Mass Attenuation

The total mass attenuation coefficients (μt) (cm2/g) and atomic, molecular, and electronic effective cross sections have been calculated for nonessential amino acids that contain H, C, N, and O such as tyrosine, aspartate, glutamine, alanine, asparagine, aspartic acid, cysteine, and glycine in the wide energy region 0.015–15 MeV. The variations with energy of total mass attenuation coefficients and atomic, molecular, and electronic cross sections are shown for all photon interactions.

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.

Advances in the measurements of the mass attenuation coefficients

2018 ◽  
Vol 48 (5) ◽  
pp. 330-335 ◽  
Author(s):  
Yves Ménesguen ◽  
Christophe Dulieu ◽  
Marie-Christine Lépy
Keyword(s):  
Attenuation Coefficients ◽  
Mass Attenuation Coefficients ◽  
Mass Attenuation

Evaluation of radiation absorption capacity of some soil samples

2018 ◽  
Vol 107 (1) ◽  
pp. 83-93 ◽  
Author(s):  
Mohammed I. Sayyed ◽  
Ferdi Akman ◽  
Veysel Turan ◽  
Aslı Araz
Keyword(s):  
Free Path ◽  
Mean Free Path ◽  
Absorption Capacity ◽  
Soil Samples ◽  
Radiation Absorption ◽  
Fast Neutrons ◽  
Attenuation Coefficients ◽  
Mass Attenuation Coefficients ◽  
Γ Ray ◽  
Mass Attenuation

Abstract The aim of the present work is to investigate the radiation absorption capacity of different soil samples in Turkey. For this purpose, we used a γ ray transmission geometry to measure the mass attenuation coefficients of eight soil samples collected between Bingöl city and Solhan district, Turkey at different γ-ray energies in the range of 13.94–88.04 keV. The radioactive sources utilized in the experiment were 241Am, 109Cd and 133Ba. FFAST and WinXCOM programs were used to evaluate the theoretical mass attenuation coefficients values of the selected soil samples. There is a good agreement between experimental and theoretical results. Additionally, the mass attenuation coefficients values used to evaluate different radiation shielding parameters such as effective atomic number, half value layer and mean free path. The variation of shielding parameters was examined for soil composition and photon energy. The obtained results revealed that S6 soil sample is the best soil in terms of shielding effectiveness among all the collected soils due to lower values for half value layer and mean free path. The effective removal cross-section (ΣR) of fast neutrons for the collected soils was also computed to examine neutrons shielding properties of the soil samples. It is found that the ΣR values for the soil samples are almost constant and lie within the range (0.04286–0.04949 cm−1).

scholarly journals Design and Production of Two-Piece Thyroid-Neck Phantom by the Concurrent Use of Epoxy Resin and Poly(Methyl Methacrylate) Soft Tissue Equivalent Materials

2018 ◽  
Vol 8 (2) ◽  
Author(s):  
M Karimi ◽  
H Mostaghimi ◽  
S. F Shams ◽  
A R Mehdizadeh
Keyword(s):  
Soft Tissue ◽  
Methyl Methacrylate ◽  
Epoxy Resin ◽  
Attenuation Coefficients ◽  
Poly Methyl Methacrylate ◽  
Tissue Equivalent ◽  
Concurrent Use ◽  
Human Soft Tissue ◽  
Mass Attenuation Coefficients ◽  
Mass Attenuation

The aim of this report is to present a new two-piece thyroid-neck phantom produced by the concurrent use of epoxy resin and poly(methyl methacrylate) (PMMA: plexiglass) soft tissue equivalent materials. Accordingly, mass attenuation coefficients of the epoxy resin and the plexiglass compounds were obtained from simulation (NIST XCOM 3.1) and measurements (practical dosimetry) and compared to those related to human soft tissue (ICRU 44). The thyroid-neck phantom and thyroid gland dimensions were derived from scientific references and the atlas of human anatomy, respectively. The thyroid phantom was designed by CATIA V5R16 software and produced by the epoxy resin compound by three-dimensional printer. Other organs were designed by ProNest software and made by the plexiglass sheets by CNC laser cutting machine. The mass attenuation coefficients for the epoxy resin (50 keV- 20 MeV) and the plexiglass (0-20 MeV) were comparable to human soft tissue (ICRU 44), all with standard relative deviation beneath 5%. In addition, the SPECT images indicated the similarity between human thyroid tissue and its phantom. In conclusion, this study proves the feasibility and reliability of epoxy resin application in the production of two-piece thyroid-neck phantom. This phantom can be applied in the calibration of gamma camera systems, dosimetry and gamma spectrometry in the nuclear medicine field.

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