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Description
Pulse‑height detectors are a standard instrument in Monte Carlo radiation‑transport simulations for reproducing high‑fidelity photon‑interaction spectra essential to gamma‑spectrometry analysis. Their use requires reconstructing the complete sequence of energy‑deposition events arising from all photon and secondary‑particle interactions within the detector medium.
This work presents a comprehensive description of the pulse‑height modelling framework implemented in the Serpent neutron–photon Monte Carlo code developed at VTT Technical Research Centre of Finland. The description covers the dedicated algorithmic workflow, Gaussian energy‑resolution broadening models, and variance‑reduction techniques optimized specifically for detector‑response calculations. The methodology is verified through analytical benchmarks and systematic comparisons with independent transport codes, and its predictive capability is further evaluated against experimental gamma‑spectroscopy measurements.