New Advances in the Experimental Studies of the \(^{46}\)Mn \(\beta ^+\)-decay Channel and Its Connection to CCSNe in LISE@GANIL

During the E666 experiment at the GANIL facility in 2016, where the fragmentation technique of a primary \(^{58}\)Ni beam was used, \(^{46}\)Mn, as well as other isotopes, was created and later implanted in a DSSSD surrounded by HPGe clovers. The subsequent \(\beta ^+\)-decay could populate \(^{46}\)Cr excited states above the proton separation energy, and later decay into \(^{45}\)V in a process called \(\beta \)-delayed proton emission. The detection of the \(\gamma \) rays and protons emitted after the \(^{46}\)Mn decay allowed us to study the inverse reaction to the \(^{45}\)V(\(p,\gamma \))\(^{46}\)Cr process. This later reaction impacts the \(^{44}\)Ti production in Supernovae events. In this work, we present the preliminary results regarding the refined energy spectrum for the \(\gamma \) rays and charged particles detected, linked to the \(^{46}\)Mn \(\beta ^+\)-decay. Published by the Jagiellonian University 2026 authors