Using HECTOR for Cross Section Measurements of 102Pd(p,γ)103Ag

Using HECTOR for Cross Section Measurements of 102Pd(p,γ)103Ag

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Emily Churchman1, Anna Simon2, Rebeka Kelmar2, Orlando Olivas-Gomez2, Craig Reingold2, Sean Kelly2


1Texas Lutheran University Department of Physics, 1000 W. Court St., Seguin, TX 78155

2University of Notre Dame Department of Physics, Notre Dame, IN 46556


The High EffiCiency TOtal absorption spectrometeR (HECTOR) consists of 16 scintillating crystals that are made of thallium-doped sodium iodide (NaI(Tl)). Each of the crystals is coupled to two photomultiplier tubes (PMT) and the detector is oriented to create a cubic array surrounding a target. This cubic array orientation allows for simultaneous measurements of the individual gamma (γ) rays produced during the de-excitation of the reaction products, creating a coverage of nearly 4π steradian. HECTOR was constructed to measure capture reactions relevant for the nucleosynthesis process at low energies. The work presented here focuses on a (p,γ) reaction on 102Pd, one of the p-nuclei produced during the p-process. The experiment was conducted at the University of Notre Dame using the FN tandem accelerator at the Nuclear Science Lab. A highly enriched 102Pd target was bombarded with a proton (p) beam at energies between 3.5-8.0 MeV in 200 keV steps. The measured cross section is compared with experimental data found in literature and theoretical models.