Direct Determination of Radioactive Nuclide Production in Astrophysical Reactions by Accelerator Mass Spectrometry (AMS)

摘要

We report on novel measurements of the total production cross section of long-lived nuclei produced in nuclear reactions relevant to astrophysical processes, using the Accelerator Mass spectrometry (AMS) technique at the Koffler accelerator of the Weizmann Institute as a direct "atom-counting" method. First results of these experiments for two such nuclides, ~(44)Ti and ~(7)Be, produced in nucleosynthesis sites and in solar fusion reactions, serve as a demonstration of the present approach and of its high sensitivity and very low background. The methodology and parameters of the present method, together with recent results, are presented.