Electron-Ion Recombination in Nitrogen

Electron recombination and diffusion in CO at elevated temperature

“…This is in accordance with some experimental findings, notably for 0,' (Mentzoni 1965) and Ne,' (Kasner 1968 ;Chen 1969), and as will be seen in the following for CO' . On the other hand, the temperature variation of a, as determined in nitrogen (Hagen 1968;Kasner 1968;Mentzoni 1963 ;Bialecke and Dougal1958), oxygen (Kasner and Biondi 1968), nitric oxide (Gunton and Shaw 1965), helium (Chen et al 196 1 ;Chen 1969), and argon (Fox and Hobson 1966;Chen 1969) can be expressed as 0 5 y 5 1.5 when the data are fitted with a simple power law, TePY. The large variation in y may be attributed to vibrationally excited ions (Bardsley 1967;Chen 1969) and/or indirect dissociative recombination through intermediate Rydberg states (Bardsley 1967); in the latter case y may be as large as 1.5.…”

“…For many years it has been realized on theoretical grounds that the dissociative electron recombination coefficient is dependent upon the electroil temperature, Tc (Bates and Dalgarno 1962), generally decreasing as the electron temperature increases. In a recent theoretical investigation Bardsley (1968) concludes that a, should vary approximately as for ions in their ground electronic and vibrational state. This is in accordance with some experimental findings, notably for 0,' (Mentzoni 1965) and Ne,' (Kasner 1968 ;Chen 1969), and as will be seen in the following for CO' .…”

“…In a recent theoretical investigation Bardsley (1968) concludes that a, should vary approximately as for ions in their ground electronic and vibrational state. This is in accordance with some experimental findings, notably for 0,' (Mentzoni 1965) and Ne,' (Kasner 1968 ;Chen 1969), and as will be seen in the following for CO' . On the other hand, the temperature variation of a, as determined in nitrogen (Hagen 1968;Kasner 1968;Mentzoni 1963 ;Bialecke and Dougal1958), oxygen (Kasner and Biondi 1968), nitric oxide (Gunton and Shaw 1965), helium (Chen et al 196 1 ;Chen 1969), and argon (Fox and Hobson 1966;Chen 1969) can be expressed as 0 5 y 5 1.5 when the data are fitted with a simple power law, TePY.…”

Studies and Experimental Work on Atomic Collision Processes Occurring in Atmospheric Gases

“…While preliminary tests were being conducted on the rf mass spectrometer which is to be use. 1 ! on the flow system, a brief study of negative ion-molecule reactions was made.…”

“…If one further assumes that the afterglow is dominated by a single positive ion species, then the electron continuity equation becomes simply, dn ^ = -a n e n + (2) where a is the recombination coefficient and n and n are the electron and e + positive ion densities, respectively. On the assumption of quasineutrality of the plasmi (2) becomes, of the plasma and negligible negative ion concentration, i.e., n = n Eq + e dn e i -r-= -a n dt e (3) with the well known "recombination solution,"…”