Photon energy absorption coefficients for nuclear track detectors using Geant4 Monte Carlo simulation

2015 ◽  
Vol 106 ◽  
pp. 83-87 ◽  
Author(s):  
Vishwanath P. Singh ◽  
M.E. Medhat ◽  
N.M. Badiger
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Energy Absorption ◽  
Photon Energy ◽  
Absorption Coefficients ◽  
Nuclear Track Detectors ◽  
Geant4 Monte Carlo Simulation

scholarly journals Monte Carlo Modeling and Design of Photon Energy Attenuation Layers for >10× Quantum Yield Enhancement in Si-Based Hard X-ray Detectors

Instruments ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 17
Author(s):  
Eldred Lee ◽  
Kaitlin M. Anagnost ◽  
Zhehui Wang ◽  
Michael R. James ◽  
Eric R. Fossum ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Quantum Yield ◽  
Photon Energy ◽  
High Efficiency ◽  
High Energy ◽  
Yield Enhancement ◽  
X Ray ◽  
Simulation Results ◽  
Conversion Efficiencies

High-energy (>20 keV) X-ray photon detection at high quantum yield, high spatial resolution, and short response time has long been an important area of study in physics. Scintillation is a prevalent method but limited in various ways. Directly detecting high-energy X-ray photons has been a challenge to this day, mainly due to low photon-to-photoelectron conversion efficiencies. Commercially available state-of-the-art Si direct detection products such as the Si charge-coupled device (CCD) are inefficient for >10 keV photons. Here, we present Monte Carlo simulation results and analyses to introduce a highly effective yet simple high-energy X-ray detection concept with significantly enhanced photon-to-electron conversion efficiencies composed of two layers: a top high-Z photon energy attenuation layer (PAL) and a bottom Si detector. We use the principle of photon energy down conversion, where high-energy X-ray photon energies are attenuated down to ≤10 keV via inelastic scattering suitable for efficient photoelectric absorption by Si. Our Monte Carlo simulation results demonstrate that a 10–30× increase in quantum yield can be achieved using PbTe PAL on Si, potentially advancing high-resolution, high-efficiency X-ray detection using PAL-enhanced Si CMOS image sensors.

Track structure modeling in liquid water: A review of the Geant4-DNA very low energy extension of the Geant4 Monte Carlo simulation toolkit

2015 ◽  
Vol 31 (8) ◽  
pp. 861-874 ◽  
Author(s):  
M.A. Bernal ◽  
M.C. Bordage ◽  
J.M.C. Brown ◽  
M. Davídková ◽  
E. Delage ◽  
...  
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Liquid Water ◽  
Low Energy ◽  
Structure Modeling ◽  
Track Structure ◽  
Geant4 Monte Carlo Simulation
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