Status of development of gamma-ray detector response function code or GAMDRF

The need for an accurate representation of the detector response functions (DRFs) for sodium iodide (NaI), bismuth germinate (BGO), etc., arises in the oilwell logging business, especially important for spectral logging tools such as a geochemical logging tool. While Monte Carlo models predict the photon spectra incidents on these detectors, the DRFs are used to generate the pulse-height spectra. A Monte Carlo-based γ-ray detector response function code (GAMDRF) was developed to meet the requirements based on complete photon physics.

► Detector response function is a powerful variance reduction technique.
► Monte Carlo based GAMDRF is suitable for many scintillation detectors.
► Semi-empirical modeling of electron transportation is accurate and fast.
► It is extremely useful for geochemical tool characterization.