LOW-SPEED LIMIT OF BOHRS STOPPING-POWER FORMULA

Bohr's classical (nonrelativistic) model of charged-particle stopping is evaluated explicitly for arbitrary values of projectile charge and speed. This removes the logarithmic cutoff from the original expressio n and generates a stopping formula which can be utilized also to exten d the range of practical applicability of Bloch's theory. As expected such a formulation appears to be a better starting point than the Born approximation for estimating stopping powers of heavy ions at velocit ies v < Z(l)e(2)/h.