Electrons. Behavior in Discharges and Afterglows

4 Interactions with Electrons. Behavior in Discharges and Afterglows Interactions with Electrons 

Neutral PH molecules in electronically excited states resulted from the bombardment of PH3 with a beam of 60-eV electrons [1] or pulses of 20-keV electrons [2]. 

PH (51.5%), and P (7%) have been reported [3]. The cross sections for the formation of negative ions are small as compared to those for the corresponding positive ions (see below). This is in agreement with the small relative abundances of negative ions reported in Phosphor C, 1965, p. 24. Further information on the formation of PHg and PH by electron impact is found in Section 1.2.4.1, p. 102, and Section 1.1.4, p. 45, respectively. 

The formation of positive ions was systematically studied by mass spectrometric tech-  

For PH+ a second appearance potential of 16.4 0.4 eV was reported [7]. The positive ions  

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