Rate coefficients for momentum transfer, charge transfer, and radiative association processes in collisions of H(+) with He below 10 exp 5 K

The charge-transfer and momentum-transfer cross sections for protons in collisions with helium are calculated at relative energies up to 5 keV. Rate coefficients are presented for temperatures up to 10 exp 5 K. Charge transfer is more rapid than radiative association at temperatures above 7500 K.