title FORMATION OF He2* BY He2+/2e- THREE-BODY COLLISIONAL RADIATIVE RECOMBINATION AND He2+/C6F5X- (X=F,Cl) ION-ION NEUTRALIZATION REACTIONS IN A HELIUM FLOWING AFTERGLOW authors Masaharu Tsuji, Erika Oda, Koichi Mogi, and Yoshiko Sakai Affilations Institute of Advanced Material Study and Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka, Japan summary The formation of He2* by the three-body He2+/2e- collisional radiative recombination and the He2+/C6F5X- (X=F,Cl) ion-ion neutralization reactions has been spectroscopically studied in a He flowing afterglow. The electronic and rotational state distributions were determined. A theoretical approach was attempted in order to explain the experimental observation.