New Advances in the Experimental Studies of the \(⁴⁶\)Mn \(β ^+\)-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 \(β ^+\)-decay could populate \(⁴⁶\)Cr excited states above the proton separation energy, and later decay into \(⁴⁵\)V in a process called \(β \)-delayed proton emission. The detection of the \(γ \) rays and protons emitted after the \(⁴⁶\)Mn decay allowed us to study the inverse reaction to the \(⁴⁵\)V(\(p,γ \))\(⁴⁶\)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 \(γ \) rays and charged particles detected, linked to the \(⁴⁶\)Mn \(β ^+\)-decay. Abstract Published by the Jagiellonian University 2026 authors