Ambipolar Diffusion Measurements in Low Pressure Rare Gas Afterglows

Experimental measurement of the mobilities of atomic, Ne^&#x002B;, and dimer, Ne<inf>2</inf>^&#x002B;, ions in Ne

“…1). The average of all the measured values of K 0 is 4.1 cm 2 V -1 s -1 which is in good agreement with most of the values (extrapolated towards E/N = 0 Td) presented in the scientific literature [7,8,9,10,11]. Due to the symmetric charge transfer process Ne + + Ne → Ne + Ne + (1) the atomic ions are slower than the dimer ions.…”

Transport coefficients of partially ionized helium

“…is the universal gas constant, s+l / and y is Euler's constant (0-5772 ...). At 300 °K the ion mobility computed with the above constants is 10-0 cm 2 /V-sec, which is close to the value of 10-2 deduced from afterglow experiments by Mulcahy & Lennon (1962) and is in slightly worse agreement with the measurement of 10-8 by Chanin & Biondi (1957).…”