Akademik Veri Yönetim Sistemi
JOURNAL OF PHYSICS D-APPLIED PHYSICS, cilt.30, sa.18, ss.2596-2602, 1997 (SCI-Expanded)
Electron attachment to trichlorotrifluoroethane (1,1,2-C2Cl3F3) was investigated in buffer gases of N-2 and Ar using a high-temperature electron swarm apparatus. The negative ion intensity was also measured as a function of electron energy using an electron beam apparatus. The electron attachment rate constant, k(a)((epsilon),T), was measured in the mean electron energy range, (epsilon), 0.043 to 4.7 eV and over a temperature, T, range 300 to 700 K in the electron swarm experiments. The electron attachment rate constant was found to first increase slightly with increasing temperature and subsequently decrease for T less than or equal to 600 K. Our room-temperature electron beam study showed that 1, 1,2-C2Cl3F3 attaches electrons predominantly via dissociative negative ion states and revealed that the electron attachment cross section exhibits three main peaks: one at similar to 0.0 eV producing Cl-, a second one at similar to 2.9 eV due to F- and a third one at similar to 7.1 eV also producing F-. The electron attachment cross sections obtained using an electron swarm-unfolding technique show that the peak at similar to 0.0 eV observed in the electron beam study is actually composed of three peaks; one at similar to 0.0 eV and two more at higher electron energies but below 1.5 eV.