Transition from the Three-Body to the Dissociative Electron-Ion Recombination in an Argon Plasma

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An experimental study is presented which is concerned with the transition from the three-body to the dissociative electron-ion recombination in an argon plasma. The measurements are performed, by using the propagation technique of the 8 mm wave, in decaying plasmas produced behind reflected shock waves in a T-type tube. It is filled with argon at initial pressures from 5 to 18 Torr. The electron densities and temperatures are respectively in the ranges from 10^<13> to 10^<10> cm^<-3> and from 10^3 to 3× 10^2°K. The recombination coefficients determined from the measured density decays are explained by the three-body recombination process for the electron densities above 10^<12> cm^<-3>. The coefficients, on the other hand, are interpreted by the dissociative process for the electron densities below 10^<11> cm^<-3> with the electron temperatures close to 3 × 10^2°K. The transition between these two processes is discussed.
社団法人日本物理学会の論文
1970-08-05