Wj. Griffiths et al., A REACTION WINDOW IN CROSS-SECTIONS FOR DOUBLE-ELECTRON-CAPTURE REACTIONS, Rapid communications in mass spectrometry, 10(9), 1996, pp. 997-1000
Double-electron-capture reactions of the type A(+)+M-->A(-)+M(2+), whe
re A is a fast moving projectile ion and M a collision-gas molecule, h
ave been studied, It has been found that when the projectile is either
a 6-keV OH+ or F+ ion, and the collision gas a fluorinated benzene mo
lecule, the cross-section for the reaction maximizes when the reaction
endoergicity has a value between 10 eV and 14 eV.