# GEANT4 models of HPGe detectors for radioassay

## TL;DR

This paper presents GEANT4-based models of two high purity germanium detectors used for radioassay, validated against real data, with estimated uncertainties of around 9-12%, enhancing accuracy in low background experiments.

## Contribution

The paper introduces validated GEANT4 models of HPGe detectors for radioassay, providing a systematic uncertainty assessment and improving simulation accuracy.

## Key findings

- Models validated against actual measurement data.
- Estimated systematic uncertainties of 9-12%.
- Enhanced reliability for low background experiment measurements.

## Abstract

Radiation transport models of two high purity germanium detectors, GeII and GeIII, located at the University of Alabama have been created in GEANT4 \cite{geant4}. These detectors have been used extensively for radioassay measurements of materials used in various low background experiments. The two models have been validated against actual data under several scenarios typically seen in radioassay measurements. The systematic uncertainties of the models for GeII and GeIII are estimated to be $\sim$12\% and $\sim$9\% respectively.