Total cross-sections for ET and GT processes in He⁺(1 s)−He(1 s²) collisions as a function of collision energy. ET triplet (singlet) is the cross-sections for electron capture to the triplet (singlet) states of He(1snl). Results of the present study (solid line) and SC-AOCC results of Gao et al. (2018, dashed line). Experimental data of Guo et al. (2017) shown as black filled triangle for the GT process and red filled circles for the ET process.