Application of Spallogenic Noble Gases Induced by Energetic Proton Irradiation to Problems in Geochemistry and Thermochronometry
Synthetic components of 3He, 4He, and 21Ne were generated within natural minerals via irradiation with 150 and 220 MeV proton beams. Fluences of ~10^14 and ~10^16 protons/cm2 induced 3He concentrations of ~10^8 and ~10^9 atoms/mg, respectively. Controlled degassing experiments on irradiated sample...