Speaker
Description
Accurate identification of γ-ray interaction sequences in highly segmented HPGe detector arrays is critical for extracting nuclear structure observables. In particular, the determination of the first and second interaction points directly impacts Doppler correction and linear polarization measurements. However, ambiguities in interaction ordering remain a key limitation in current analysis approaches.
We present a framework for benchmarking interaction ordering in the GRETINA array using physics-driven observables. Doppler-corrected γ-ray energy resolution is used as a diagnostic for the accuracy of first interaction point identification, while linear polarization sensitivity provides a complementary probe of second interaction point reconstruction.
Initial studies demonstrate that these observables provide stringent and independent constraints on interaction ordering, enabling quantitative comparison between reconstruction approaches. This methodology establishes a direct link between detector-level reconstruction and experimentally accessible physics quantities.
These benchmarks provide a pathway for systematically improving interaction ordering and extending the sensitivity of γ-ray spectroscopy measurements, particularly for weak transitions and polarization observables in complex datasets.