COLLISION-INDUCED INTERACTION CROSS-SECTIONS OF 1-7 MEV B-2 IONS INCIDENT ON AN N-2 GAS-TARGET

Collision-induced interaction cross sections were measured for 1-7 MeV diatomic boron molecular ions incident on a nitrogen gas target by us ing a differentially pumped gas cell. The dissociation cross section o f B-2(q+) (q=1-3) were measured to be on the order of 10(-15) cm(2). T he dissociation cross section was found to decrease with increasing io n charge state, and with increasing collision energy. The single-elect ron-loss cross section of B-2(1+) was measured to be on the order of 1 0(-16) cm(2) and the double-electron-loss cross section of B-2(1+) was measured to be on the order of 10(-17) cm(2) for 3 MeV cm ions. The s ingle-electron-capture cross section of B-2(2+) was measured to be on the order of 10(-20) cm(2).