Strength of the E_p = 1.842 MeV resonance in the ⁴⁰Ca(p,γ)⁴¹Sc reaction reexamined

The strength of the E_p = 1.842 MeV resonance in the ⁴⁰Ca(p,γ)⁴¹Sc reaction is determined with two different methods: First, by an absolute strength measurement using calcium hydroxide targets, and second, relative to the well-determined strength of the resonance triplet at E_α = 4.5 MeV in the ⁴⁰Ca(α,γ)⁴⁴Ti reaction. The present new value of ωγ = (0.192 ± 0.017) eV is 37% (equivalent to 3.5 σ) higher than the evaluated literature value. In addition, the ratio of the strengths of the 1.842 MeV ⁴⁰Ca(p,γ)⁴¹Sc and 4.5 MeV ⁴⁰Ca(α,γ)⁴⁴Ti resonances has been determined to be 0.0229 ± 0.0018. The newly corrected strength of the 1.842-MeV resonance can be used in the future as a normalization point for experiments with calcium targets.