Novel analysis of proton-γ coincidences for the β-delayed proton emission technique: the case of ⁴⁶Mn

In the interest of exploring resonant contributions to the radiative capture reaction ⁴⁵ 45 V(p, γ γ ) ⁴⁶ 46 Cr, which is identified to impact the ⁴⁴ 44 Ti nucleosynthesis in Core Collapse Supernovae at astrophysical energies, we performed a spectroscopic study of ⁴⁶ 46 Cr through the β β -decay of the progenitor ⁴⁶ 46 Mn. We present new results on the decay scheme of the proton-rich exotic nucleus ⁴⁶ 46 Mn based on a new approach at the level of the experimental data analysis. ⁴⁶ 46 Mn was produced among other nuclei at the LISE3 fragment separator operated in GANIL using the fragmentation technique. The novel approach is compared with a traditional data analysis, and validated using the known decay scheme of ⁴⁵ 45 Cr. The observed level scheme of the nucleus ⁴⁶ 46 Cr is compared with previous works. This work confirms former experimental results, while presenting better statistics and revealing new transitions in the decay scheme.