Monte Carlo simulation of a photodisintegration of $^{3}H$ experiment in Geant4

An upcoming experiment involving photodisintegration of $^{3}H$ at the High Intensity Gamma-Ray Source facility at Duke University [1] has been simulated in the software package Geant4. CAD models of silicon detectors and wire chambers were imported from Autodesk Inventor using the program FastRad and the Geant4 GDML importer. Sensitive detectors were associated with the appropriate logical volumes in the exported GDML file so that changes in detector geometry will be easily manifested in the simulation. Probability distribution functions for the energy and direction of outgoing protons were generated using numerical tables from previous theory [1], and energies and directions were sampled from these distributions using a rejection sampling algorithm. The simulation will be a useful tool to optimize detector geometry, estimate background rates, and test data analysis algorithms. \\[4pt] [1] C.R. Howell, Differential Cross-Section Measurements of Two- and Three- body Photodisintegration of the Triton and Search for a Bound Dineutron State: A New Proposal to the High Intensity Gamma-Ray Source (HI$\gamma$S). [Conference] HI$\gamma$S-PAC (June 2013).