Calibration and Efficiency Analysis of HECTOR: Advancing Precision in Stellar Nucleosynthesis Measurements

The High-Efficiency Total Absorption Spectrometer (HECTOR), a 4π ɣ-summing detector at University of Notre Dame, is designed for precise cross-section measurements crucial for refining stellar nucleosynthesis models. In this presentation, the calibration method for HECTOR using standard sources and in-beam data will be presented. The calibration successfully achieves accurate results for ɣ-ray energies up to 6 MeV and will be expanded up to 12 MeV. Results of the detector’s efficiency analysis using a 60Co source placed off-axis will also be discussed. The measurements were conducted to investigate the impact of the target position within HECTOR on the detector efficiency and have shown that the efficiency is unaffected by off-axis reactions.