Lanthanum bromide (LaBr) scintillation detectors, with high detection efficiency and a short signal decay time, are ideal for measuring γ-spectra in nuclear physics experiments, such as nuclear resonance fluorescence experiments.

To infer the energy of γ-quanta from the pulse height of a LaBr detector signal, its energy calibration must be precisely determined. The energy calibration is usually not constant, but depends, among other things, on the detector's count rates, i.e., the number of events the detector must process within a given time period; typically 10^5 events per second.

For a recent experiment conducted at the High Intensity γ-ray Source (HIγS) at the renowned Duke University in the USA, accurate energy calibration of the LaBr detectors used is of key importance in the analysis of the measured data. As part of the experiment, several series of measurements were performed with the nucleus C-12 to determine the rate dependence of the energy calibration of the LaBr detectors. As for this bachelor thesis, the C-12 data will be analyzed to qualitatively and quantitatively determine the observed rate dependence. The results of this work are essential for the accurate analysis of the recorded experimental data.