Cross Section for the Astrophysical14C(n, γ)15C Reaction via the Inverse Reaction

• DOI: 10.1086/339726
• Publication Date: 2002-07-28T22:34:34Z
• Authors: A. Horvath; J. Weiner; A. Galonsky; F. Deak; Y. Higurashi; K. Ieki; Y. Iwata; A. Kiss; J. J. Kolata; Z. Seres; J. von Schwarzenberg; H. Schelin; S. Takeuchi; S. Typel; R. E. Warner
• Keywords: Excitation function; Big Bang nucleosynthesis; Reaction rate

The 14C(n, γ)15C reaction is important in neutron-induced CNO cycles of stellar evolution phases beyond the main sequence. chain reactions primordial nucleosynthesis neutron-rich environment an inhomogeneous big bang also involves reaction. We have used a beam 15C ions at E/A = 35 MeV to measure cross sections for breakup on targets C, Al, Zn, Sn, and Pb. Coulomb part section was determined as function decay energy. By principle detailed balance, neutron capture then This excitation rises with energy 7 μbarns 300 keV falls 2 1.2 MeV. In stellar-burning region, our exceeds previous measurement by factor 3. Neither shape nor magnitude agrees those theoretical calculations based direct model. rate calculated reliably up ~T9 5. temperature range models, 14C(p, γ)15N T9 < 1.2.