CHARGE PRODUCTION IN COLLISIONS BETWEEN HYDROGEN ATOMS AND HE NE AR AND H2 IN ENERGY RANGE FROM 50-1000-EV

Experimental results on negative-charge production in collisions of hydrogen atoms with He, Ne, Ar, and H2 are reported. For the three noble gases a rather smooth rise of the cross section with energy was found, absolute values ranging from about 10-18-10-16 cm2. For collisions of H on H2, an interesting structure appears which seems to extend structure indicated in earlier high-energy measurements. From extrapolations of our results and comparison with high-energy stripping measurements, a trend in the ratio between target ionization and projectile stripping from He to Ne to Ar is indicated. © 1969 The American Physical Society.