Identify the dominant reaction channel for carbon-12 production

Identify the dominant nuclear reaction contributing to the apparent production of carbon-12 in the oxygen–neon shell-merger convection zone by conducting reaction-by-reaction diagnostics, particularly to determine whether the reverse triple-alpha channel is responsible.

Background

The reduced 14-isotope nuclear network simulation identifies a carbon-12 production region just above the temperature maximum and a destruction region farther out in the merged convective zone. The authors suggest that the apparent production may be dominated by the reverse triple-alpha channel, but the net isotope-level transport equation does not by itself establish which individual reaction is responsible.

Resolving the contribution of each reaction requires reaction-by-reaction diagnostics. This matters for interpreting the origin of the layered convective-reactive structure and for assessing how reliably the reduced network captures the underlying nucleosynthesis.