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Spectra of dense helium excited by electron impact
This is an account of the visible and near infrared spectrum of dense helium excited by 160keV electrons. It has been suspected that metastable helium atoms are involved in production of strong 02 and N2 spectra when ...
Spin dependent reactions in an electronically excited helium discharge
The electron spin dependence of reactions involving helium metastable atoms is investigated using optical pumping and microwave diagnostic techniques. Wigner (1927) proposed that electron spin angular momentum is conserved ...