The explosive burning of 17O, which exhibits resonance at E Rlab = 190 keV in the 17O(p, γ) 18F reaction, was analyzed. The resonance strength was about ωγpγ =(1.2∓0.2)×10-6 eV, which revealed that uncertainities in thermonuclear reaction rates were reduced by orders of magnitude at nova temperatures. The uncertainty in 17O(p, α)18F reaction rates was found to be ≅30%. The results show that resonance in thermonuclear reaction reduced uncertainty in galactic synthesis of 17O, the stellar production of 18F, and oxygen isotopic ratios in nova ejecta.
ASJC Scopus subject areas
- Physics and Astronomy(all)