Measurements of <sup>92</sup>Mo(p,γ)<sup>93</sup>Tc and <sup>94</sup>Mo(p,γ)<sup>95</sup>Tc cross sections for γ-process modeling

ORAL

Abstract

When modeling the p-nuclei abundances through the γ-process a consistent underproduction of the lighter p-nuclei, molybdenum and ruthenium, has been observed. Additionally, past measurements of the 92Mo(p,γ)93Tc cross section showed the possibility of resonance structures within the energy range relevant to the γ-process, which deviate from the smooth cross sections predicted in Hauser-Feschbach based models used in the modelling. In order to investigate this we measured both the 92Mo(p,γ)93Tc and the 94Mo(p,γ)95Tc cross sections at the University of Notre Dame’s Nuclear Science Laboratory. The High EfficienCy TOtal absorption spectrometeR (HECTOR) was used as well as the 5U 5 MV single-ended accelerator to measure the cross sections over the range Ep = 1.4–4.4 MeV. Various structures were observed in the 92Mo(p,γ)93Tc cross section and preliminary results for both measurements will be discussed.

*This work was supported by the National Science Foundation (NSF) under Grants No. PHY-1713857, PHY-2011890, PHY-1614442.

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Presenters

  • Rebeka Kelmar

    • University of Notre Dame

Authors

  • Rebeka Kelmar

    • University of Notre Dame

  • Anna Simon

    • University of Notre Dame

  • Jane O'Reilly

    • Skidmore College
    • Skidmore College, University of Notre Dame

  • Alexander C Dombos

    • University of Notre Dame
    • FRIB

  • Orlando J Gomez

    • University of Notre Dame

  • John P McDonaugh

    • University of Notre Dame

  • Miriam Matney

    • University of Notre Dame

  • Jessica Koros

    • University of Notre Dame

  • August Gula

    • University of Notre Dame

  • Edward J Stech

    • University of Notre Dame

  • Khachatur Manukyan

    • University of Notre Dame

  • Daniel Robertson

    • University of Notre Dame