C12+12C fusion S⁎-factor from a full-microscopic nuclear model

Status of deep subbarrier $\mathbf{{}^{12}{\rm C}+{}^{12}{\rm C}}$ fusion and advancing the Trojan horse method

“…The calculated AMD S * -factor [27], cyan dash line, shows strong resonances at 0.94 MeV and 1.5 MeV and a resonance at 2.2 MeV, see the cyan dash curve in Fig. 1.…”

“…However, as we have discussed, the analysis of the THM data was performed in the plane-wave approximation (PWA), Modified astrophysical factors for the 12 C + 12 C fusion. The navy rectangles and the magenta diamonds are the astrophysical factors from [25] (STELLA) and [26] (Notre-Dame-Mexico), black dotted line is the THM S * (E)-factor [7] (THM (Nature)), the navy dash-dotted line is the Coulombnuclear renormalized astrophysical factor [22,23] normalized to the S-factor from [25] at E = 2.54 MeV (THMCN(1)), the magenta solid line is the Coulomb-nuclear renormalized astrophysical factor normalized to the S-factor from [26] at E = 2.64 MeV (THMCN(2)), the cyan dash line is the AMD microscopic calculations from [27].…”

“…In 2021, the first fully microscopic approach based on the antisymmetrized molecular dynamic (AMD) had been published [27]. It was a real breakthrough in the long-stalled theory of carbon-carbon fusion.…”

Constraining Accreted Neutron Star Crust Shallow Heating with the Inferred Depth of Carbon Ignition in X-ray Superbursts

“…At temperatures relevant for the accreted neutron star envelope, this nuclear reaction rate is based on nuclear theory calculations and is uncertain by several orders of magnitude (Beck et al 2020;Tang & Ru 2022;Aliotta et al 2022). Modern theoretical 12 C+ 12 C rates include results from barrier penetration calculations using the Sao Paulo potential (Yakovlev et al 2010), coupled-channel calculations performed using the M3Y+repulsion double-folding potential (Esbensen et al 2011), empirical extrapolations based on the hindrance model (Jiang et al 2018), experimentally derived results based on the trojan horse method (THM) (Tumino et al 2018), THM results adopting a Coulomb renormalization (Mukhamedzhanov et al 2019), and a microscopic model with molecular resonances (Taniguchi & Kimura 2021). Each of these are used in the present work.…”

“…Mol. Res (Taniguchi & Kimura 2021),. Sao Paulo(Yakovlev et al 2010), CC M3Y+Rep(Esbensen et al 2011), and THM(Tumino et al 2018).…”