I have looked for relevant information in the paper Chemical evolution with rotating massive star yields II. A new assessment of the solar s- and r- process components before, but unfortunately, it only records the element gallium.

  • $\begingroup$ You mean it starts from Gallium. $\endgroup$
    – ProfRob
    Apr 22, 2021 at 9:11
  • $\begingroup$ Yes, the element preceding gallium was not present in that paper $\endgroup$
    – Ddjz
    Apr 22, 2021 at 11:07


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