Attachment of Low-Energy Electrons to O_2-Molecules in Ar-N_2-O_2 Gaseous Mixtures

概要

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The attachment coefficient α of low-energy electrons to oxygen molecules in Ar-N_2-O_2 ternary gas mixtures of various composition was measured at room temperature for various values of electron characteristic energy ε_k below 1 eV, using an electron-pulse ionization chamber. Under a constant value of ε_k the observed "reduced" rate of attachment αw/p(O_2), where w denotes the drift velocity of electrons and p(O_2) the oxygen partial pressure, showed a broad maximum and a following shallow minimum when plotted against p(Ar) in the region where p(Ar) became comparable to p(N_2), whereas it increased faster than linearly when plotted against p(N_2)again in the region where p(N_2)∼(Ar). These experimental results show, as expected, that the shape of the electron energy distribution is different for gases with different mixing ratios of the component gases even for the same value of ε_k.
社団法人応用物理学会の論文
1981-08-05