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Results on the Production of the Astrophysically-Relevant <sup>41</sup>Ca and the Medically-Relevant <sup>43,44</sup>Sc from the Reaction of <sup>3</sup>He on <sup>nat</sup>Ca

ORAL

Abstract

41Ca (t1/2=9.94 x 104 yrs) is an important stellar radionuclide as its production in the Early Solar System from various irradiation scenarios can help determine the viability of models of early stellar processes. A novel reaction technique has been under development and recently tested at the NSL at the University of Notre Dame. This technique utilizes an “in-cathode” reaction method, where natural CaF2 material is packed into an ion source sample holder (cathode) and then irradiated and subsequently measured using Accelerator Mass Spectrometry without the need for any chemical processing. Multiple irradiations at various energies were performed using a 3He beam to measure the reaction natCa(3He,x)41Ca. In order to help quantify the amount of beam hitting the Cu cathode, all samples were placed in a gamma counting station after irradiation. The gamma spectra revealed noticeably distinct lines from 43Sc and 44Sc, encouraging an impromptu investigation into the production yields of these isotopes due to their significance as nuclear medical isotopes. This will be the first ever known result of thick target yields of the reactions natCa(3He,x)43,44Sc. Results on the production of 41Ca, 43Sc and 44Sc will all be presented.

Presenters

  • Austin D Nelson

    University of Notre Dame

Authors

  • Austin D Nelson

    University of Notre Dame

  • Adam M Clark

    University of Notre Dame

  • Lauren K Callahan

    University of Notre Dame

  • Philippe A Collon

    University of Notre Dame

  • Thomas L Bailey

    Notre Dame Physics, University of Notre Dame