Solution of the α-potential mystery in the γ process and its impact on the Nd/Sm ratio in meteorites.

  title={Solution of the $\alpha$-potential mystery in the $\gamma$ process and its impact on the Nd/Sm ratio in meteorites.},
  author={Thomas Rauscher},
  journal={Physical review letters},
  volume={111 6},
  • T. Rauscher
  • Published 18 July 2013
  • Physics
  • Physical review letters
The 146Sm/144Sm ratio in the early solar system has been constrained by Nd/Sm isotope ratios in meteoritic material. Predictions of 146Sm and 144Sm production in the γ process in massive stars are at odds with these constraints, and this is partly due to deficiencies in the prediction of the reaction rates involved. The production ratio depends almost exclusively on the (γ,n)/(γ,α) branching at 148Gd. A measurement of 144Sm(α,γ)148Gd at low energy had discovered considerable discrepancies… 

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