Direct excitation of H(2P) atoms due to collisions with protons and antiprotons

Abstract

Excitation of hydrogen atoms, being initially in the excited 2p state by colliding with protons (p) and antiprotons $\bar{(p)}$ is investigated within the impact parameter method. The calculation involves the n = 1,2,3,4 states of the target in addition to considers previously, in an incident energy range from 3 keV to 1000 keV. The effect of the electric charge of the projectile on the collision is discuss