Monte Carlo simulation for photon energy response from the RADOS dosemeter

Area of Science:

• Medical Physics
• Radiation Dosimetry
• Computational Physics

Background:

• Monte Carlo codes are essential for simulating ionizing radiation interactions.
• Understanding different interaction models and their physical phenomena is crucial for accurate dosimetry.
• The RADOS dosemeter is a widely used device for radiation monitoring.

Purpose of the Study:

• To analyze the Simple Physical Treatment (SPT) photon interaction model within the MCNPX Monte Carlo code.
• To estimate the energy dependence of photons relevant to RADOS dosemeter measurements.
• To validate the MCNPX SPT model's simulation accuracy against experimental data.

Main Methods:

• Simulating photon interactions using the Simple Physical Treatment model in MCNPX.
• Calculating energy deposition in the MTS-N detector and air kerma.
• Comparing simulation results with experimental data from literature for validation.

Main Results:

• The study obtained energy deposition and air kerma values with uncertainties between 1.5% and 3.0%.
• The simulation methodology using MCNPX SPT for RADOS dosemeters was successfully validated.
• The validated model provides a reliable method for dose assessment.

Conclusions:

• The Simple Physical Treatment model in MCNPX is a validated tool for simulating RADOS dosemeter responses.
• The validated methodology enables accurate correction of effective dose calculations.
• This research contributes to improving the accuracy of radiation dosimetry and monitoring.