Measurement of d+^{7}Be Cross Sections for Big-Bang Nucleosynthesis. Academic Article uri icon


  • The cross sections of nuclear reactions between the radioisotope ^{7}Be and deuterium, a possible mechanism of reducing the production of mass-7 nuclides in big-bang nucleosynthesis, were measured at center-of-mass energies between 0.2 and 1.5MeV. The measured cross sections are dominated by the (d,) reaction channel, towards which prior experiments were mostly insensitive. A new resonance at 0.36(5)MeV with a strength of =1.7(5)keV was observed inside the relevant Gamow window. Calculations of nucleosynthesis outcomes based on the experimental cross section show that the resonance reduces the predicted abundance of primordial ^{7}Li, but not sufficiently to solve the primordial lithium problem.

published proceedings

  • Phys Rev Lett

author list (cited authors)

  • Rijal, N., Wiedenhver, I., Blackmon, J. C., Anastasiou, M., Baby, L. T., Caussyn, D. D., ... Rogachev, G. V.

publication date

  • January 1, 2019 11:11 AM