Use of the EGS4 Monte Carlo code to evaluate the response of HgI2 and CdTe detectors for photons in the diagnostic energy range

Abstract Introduction: The present study aimed to investigate the radiation protection properties of silicon-based composites doped with nano-sized Bi2O3, PbO, Sm2O3, Gd2O3, WO3, and IrO2 particles. Radiation shielding properties of Sm2O3 and IrO2 nanoparticles were investigated for the first time in the current study. Material and methods: The MCNPX (2.7.0) Monte Carlo code was utilized to calculate the linear attenuation coefficients of single and multi-nano structured composites over the X-ray energy range of 10–140 keV. Homogenous distribution of spherical nanoparticles with a diameter of 100 nm in a silicon rubber matrix was simulated. The narrow beam geometry was used to calculate the photon flux after attenuation by designed nanocomposites. Results: Based on results obtained for single nanoparticle composites, three combinations of different nano-sized fillers Sm2O3+WO3+Bi2O3, Gd2O3+WO3+Bi2O3, and Sm2O3+WO3+PbO were selected, and their shielding properties were estimated. In the energy range of 20-60 keV Sm2O3 and Gd2O3 nanoparticles, in 70-100 keV energy range WO3 and for photons energy higher than 90 keV, PbO and Bi2O3 nanoparticles showed higher attenuation. Despite its higher density, IrO2 had lower attenuation compared to other nanocomposites. The results showed that the nanocomposite containing Sm2O3, WO3, and Bi2O3 nanoparticles provided better shielding among the studied samples. Conclusions: All studied multi-nanoparticle nanocomposites provided optimum shielding properties and almost 8% higher attenuation relative to single nano-based composites over a wide range of photon energy used in diagnostic radiology. Application of these new composites is recommended in radiation protection. Further experimental studies are suggested to validate our findings.

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Investigation of glass-built multigap-RPC simulation response to gamma-rays up to an energy range of 1.0 GeV using GEANT4 Monte Carlo code

AFRICAN JOURNAL OF BUSINESS MANAGEMENT ◽

10.5897/ijps11.638 ◽

2011 ◽

Vol 6 (31) ◽

Author(s):

M. Jamil

Keyword(s):

Monte Carlo ◽

Energy Range ◽

Gamma Rays ◽

Monte Carlo Code

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INVESTIGATION OF APPLICABILITY OF PURE PROPANE GAS FOR MICRODOSIMETRY AT NEUTRON FIELDS: A MONTE CARLO STUDY

Radiation Protection Dosimetry ◽

10.1093/rpd/ncy261 ◽

2018 ◽

Vol 185 (1) ◽

pp. 74-86 ◽

Cited By ~ 2

Author(s):

Arghya Chattaraj ◽

T Palani Selvam ◽

D Datta

Keyword(s):

Monte Carlo ◽

Energy Range ◽

Neutron Energy ◽

Proportional Counter ◽

Monte Carlo Study ◽

Monte Carlo Code ◽

Scaling Factors ◽

Neutron Sources ◽

Tissue Equivalent ◽

Tissue Equivalent Proportional Counter

Abstract Applicability of pure propane gas for microdosimetric measurements in neutron fields was investigated using the FLUKA Monte Carlo code. Monoenergetic neutrons in the energy range 1 keV−20 MeV and the ISO-neutron sources such as 241Am-Be, 241Am-B, 252Cf and 252Cf + D2O were considered in the present study. The tissue-equivalent proportional counter (TEPC) simulated in the study was LET-1/2 (by Far West Technology) with site sizes 1, 2 and 8 μm. The study demonstrates that for a given site size, the TEPC filled with tissue-equivalent propane and pure propane gases produce similar microdosimetric distributions when the density of pure propane gas is lowered appropriately. For the ISO-neutron sources, the density of propane gas requires scaling by a factor 0.85. For the monoenergetic neutrons, depending upon the neutron energy, the values of scaling factors are in the range of 0.58–0.93.

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Bragg peak characteristics of proton beams within therapeutic energy range and the comparison of stopping power using the GATE Monte Carlo simulation and the NIST data

Journal of Radiotherapy in Practice ◽

10.1017/s1460396919000554 ◽

2019 ◽

Vol 19 (2) ◽

pp. 173-181 ◽

Cited By ~ 1

Author(s):

Shiva Zarifi ◽

Hadi Taleshi Ahangari ◽

Sayyed Bijan Jia ◽

Mohammad Ali Tajik-Mansoury ◽

Milad Najafzadeh ◽

...

Keyword(s):

Monte Carlo ◽

Energy Range ◽

Bragg Peak ◽

Stopping Power ◽

Reference Database ◽

Monte Carlo Code ◽

Proton Beams ◽

Depth Dose ◽

Entrance Dose ◽

Study Results

AbstractPurpose:To examine detail depth dose characteristics of ideal proton beams using the GATE Monte Carlo technique.Methods:In this study, in order to improve simulation efficiency, we used pencil beam geometry instead of parallel broad-field geometry. Depth dose distributions for beam energies from 5 to 250 MeV in a water phantom were obtained. This study used parameters named Rpeak, R90, R80, R73, R50, full width at half maximum (FWHM), width of 80–20% distal fall-off (W(80–20)) and peak-to-entrance ratio to represent Bragg peak characteristics. The obtained energy–range relationships were fitted into third-order polynomial formulae. The present study also used the GATE Monte Carlo code to calculate the stopping power of proton pencil beams in a water cubic phantom and compared results with the National Institute of Standards and Technology (NIST) standard reference database.Results:The study results revealed deeper penetration, broader FWHM and distal fall-off and decreased peak-to-entrance dose ratio with increasing beam energy. Study results for monoenergetic proton beams showed that R73 can be a good indicator to characterise a range of incident beams. These also suggest FWHM is more sensitive than W(80–20) distal fall-off in finding initial energy spread. Furthermore, the difference between the obtained stopping power from simulation and NIST data almost in all energies was lower than 1%.Conclusion:Detail depth dose characteristics for monoenergetic proton beams within therapeutic energy ranges were reported. These results can serve as a good reference for clinical practitioners in their daily practice.

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MULTIPLICITY DISTRIBUTIONS OF TARGET FRAGMENTS IN 60 AGeV16O-EMULSION INTERACTIONS

International Journal of Modern Physics E ◽

10.1142/s0218301396000335 ◽

1996 ◽

Vol 05 (04) ◽

pp. 617-630 ◽

Cited By ~ 1

Author(s):

M. EL-NADI ◽

N. METTWALLI ◽

E.A. SHAAT ◽

A. HUSSIEN ◽

Z. ABOU-MOUSSA ◽

...

Keyword(s):

Monte Carlo ◽

Energy Range ◽

Nuclear Emulsion ◽

High Energy ◽

Monte Carlo Code ◽

Central Collisions ◽

High Energy Collisions ◽

Multiplicity Distributions ◽

Limiting Fragmentation

The results of the interactions of 60 AGeV 16 O in nuclear emulsion are studied and compared with those previously obtained for the same projectile at different energies where it was found that within the energy range from 2.1 up to 200 AGeV, the probability for central collisions of 16 O with emulsion nuclei as well as the percentage of events having projectile fragments (PFs) of charge Z≥3 are nearly constant. Multiplicity distributions of different charged secondaries are compared with the predictions of the Monte Carlo Code VENUS which takes into account the intranuclear cascading. The correlations between the various parameters are discussed. The data on shower and grey produced particles are well described by VENUS, however the black track data show a significant departure from this model. The study of heavy track data confirms the limiting fragmentation behaviour in high energy collisions. The multiplicity distributions of different charged secondaries are also compared with those obtained using different projectiles at nearly the same energy.

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Validation of GATE Monte Carlo code for simulation of proton therapy using National Institute of Standards and Technology library data

Journal of Radiotherapy in Practice ◽

10.1017/s1460396918000493 ◽

2018 ◽

Vol 18 (1) ◽

pp. 38-45 ◽

Cited By ~ 3

Author(s):

Shiva Zarifi ◽

Hadi Taleshi Ahangari ◽

Sayyed Bijan Jia ◽

Mohammad Ali Tajik-Mansoury

Keyword(s):

Monte Carlo ◽

Energy Range ◽

Water Medium ◽

Monte Carlo Code ◽

Statistical Uncertainty ◽

Simulation Code ◽

Simulation Efficiency ◽

Optimal Value ◽

Beam Range ◽

Range Calculation

AbstractAimTo validate the Geant4 Application for Tomographic Emission (GATE) Monte Carlo simulation code by calculating the proton beam range in the therapeutic energy range.Materials and methodsIn this study, the GATE code which is based on Geant4 was used for simulation. The proton beams in the therapeutic energy range (5–250 MeV) were simulated in a water medium, and then compared with the data from National Institute of Standards and Technology (NIST) in order to investigate the accuracy of different physics list available in the GATE code. In addition, the optimal value of SetCut was assessed.ResultsIn all energy ranges, the QBBC physics had a greater deviation in the ranges relative to the NIST data. With respect to the range calculation accuracy, the QGSP_BIC_EMY and QGSP_BERT_HP_EMY physics were in the range of statistical uncertainty; however, QGSP_BIC_EMY produced better results using the least squares. Based on an investigation into the range calculation precision and simulation efficiency, the optimal SetCut was set at 0·1 mm.FindingsBased on an investigation into the range calculation precision and simulation yield, the QGSP_BIC_EMY physics and the optimal SetCut was recommended to be 0·1 mm.

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