Astrophysical S-factor data constrain variations in the electromagnetic fine-structure constant to |δ α/α| ≤ 0.0002 in radiative alpha capture on carbon-12.
Fixing effective range parameters in elastic𝛼- 12C scattering: impact on resonant 2+ 4 state of16O and𝑆 𝐸2 factor of 12C(𝛼,𝛾)16O*.Chin
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Fine-tunings in radiative $\alpha$-particle capture on $^{12}$C at astrophysical energies
Astrophysical S-factor data constrain variations in the electromagnetic fine-structure constant to |δ α/α| ≤ 0.0002 in radiative alpha capture on carbon-12.