Theoretical investigation of B- neutralization in energetic collisions with charged bare projectiles

The neutralization of B- ions in energetic collisions with bare charged pro jectiles is studied for two different ranges of collision parameters: (a) Z << v; (b) Z greater than or similar to v, where Z and v are the projectile charge and velocity, respectively. For both ranges analytical formulae are derived fur the cross section of B- neutralization. These formulae are gen eralized For collisions with relativistic velocities. Scaling relations are proposed for the dependence of the neutralization cross section on the ele ctron affinities in weakly bound negative ions with an active p- or s-elect ron. With known cross sections For the neutralization of B- and H- the scal ing relations allow us to estimate neutralization cross sections for other negative ions with loosely bound s- and p-electrons. We also discuss the po ssibility of applying our results to estimate the neutralization of B- in c ollisions with electrons.