Performance of a compact multi-crystal high-purity germanium detector array for measuring coincident gamma-ray emissions

• DOI: 10.1016/j.nima.2015.02.022
• Publication Date: 2015-02-18T02:59:05Z
• Authors: Chris Howard; Stephen Daigle; Matt Buckner; Luke E. Erikson; Robert C. Runkle; Sean C. Stave; Arthur E. Champagne; Andrew Cooper; Lori Downen; Brian D. Glasgow; Keegan Kelly; Anne Sallaska
• Keywords: Cryostat; Semiconductor detector; Crystal (programming language); Particle detector

The Multi-sensor Airborne Radiation Survey (MARS) detector is a 14-crystal array of high-purity germanium (HPGe) detectors housed in a single cryostat. The array was used to measure the astrophysical S-factor for the 14N(p,γ)15O* reaction for several transition energies at an effective center of mass energy of 163 keV. Owing to the segmented nature of the MARS detector, the effect of gamma-ray summing was greatly reduced in comparison to past experiments which utilized large, single-crystal detectors. The new S-factor values agree within the uncertainties with the past measurements. Details of the analysis and detector performance will be presented.