Reaction rates of the fusion reaction $^{12}$C+$^{12}$C at E$_{CM}$ = 2.10 to 4.75 MeV for the $^{20}$Ne and $^{23}$Na exit channels

ORAL

Abstract

The fusion reaction $^{12}$C + $^{12}$C has been studied at E$_{CM}$ = 2.10 to 4.75 MeV by $\gamma$-ray spectroscopy using a C target of ultra-low hydrogen contamination. The deduced astrophysical \~{S}(E) factor exhibits previously unknown resonances at E $\leq$ 3.0 MeV, in particular a strong narrow resonance at E = 2.14 MeV, which lies at the high-energy tail of the Gamow peak. The resonance increases the present non-resonant reaction rate of the $\alpha$ channel significantly near T = 8 x 10$^{8}$ K. Due to the resonance structure, extrapolation to the Gamow energy E$_{G}$ = 1.5 MeV is quite uncertain.

–

Authors

  • Timothy Spillane

    • University of Connecticut

  • Francesco Raiola

    • Experimentalphysik III, Ruhr Universit\"{a}t Bochum, Germany

  • Sheng Zeng

    • Chinese Institute of Atomic Energy, Beijing, China

  • Hans-Werner Becker

    • Fakult\"at f\"ur Physik und Astronomie, Ruhr Universit\"at Bochum, Germany

  • Cristina Bordeanu

    • Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH), Romania

  • Claus Rolfs

    • Experimentalphysik III, Ruhr Universit\"at Bochum, Germany

  • Jeffrey Schweitzer

    • University of Connecticut

  • Frank Strieder

    • Experimentalphysik III, Ruhr Universit\"at Bochum, Germany

  • Daniel Sch\"urmann

    • Experimentalphysik III, Ruhr Universit\"at Bochum, Germany

  • Lucio Gialanella

    • Dipartimento di Scienze Fisiche, Universita Federico II, Napoli and INFN, Napoli, Italy