Proton capture reaction of ³³S in nova V1065 Centauri

The previous studies have shown that ³³S(p, γ)³⁴Cl is the most important reaction that affects the abundance of ³³S in the product of nova nucleosynthesis. In this paper, a more accurate thermonuclear reaction rate of ³³S (p, γ) ³⁴Cl in the nova is calculated based on the newly measured ³⁴Cl nuclear resonance levels. The electron screening correction and the non-resonance and the narrow-resonance contributions are considered. The calculations are also combined with the recent observational data of nova V1065 Centauri and show that the thermonuclear reaction rates of ³³S (p, γ) ³⁴Cl are significantly different in the improved method. Because these results can affect the isotopic ratio of sulfur in the nova ejecta significantly, we make an estimate of the values of ³²S/³³S and ³³S/³³S, which can be used as a diagnostic tool for the novae.