Excitation of He by Nez+(z=1,2,3,4) between 20 keV and 1 MeV

1 June 1977

journal article
Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics

Vol. 10 (8) , L311-L315
https://doi.org/10.1088/0022-3700/10/8/010

Abstract

Emission cross sections for He I and He II lines between 2000 and 6000 AA have been measured for impact of Ne^z+ (z=1,2,3,4) ions of 20 keV to 1 MeV on He. At a fixed impact energy it has generally been found that with increasing projectile charge the cross sections for He I decrease whereas those for He II increase and become even larger than for He I. This remarkable result is explained quantitatively by considerations of the respective quasi-molecular potential curves.

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CROSS SECTION

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