Electron attachment lineshapes, cross sections and rate constants at ultra-low energies in several halomethyl and haloethyl molecules

Abstract

During the use of these data in a recent publication by Sunagawa and Shimamori (1995), it was brought to our attention that the cross section for electron attachment to CHBr2CHBr2 was not explicitly stated. The two segments of cross section from table 2 have to join smoothly at electron energy ϵ = 0.060 eV where the experimental slope γ changes from 8.32 × 10-2 eV to 0.166 eV. The proper form is: Figure 1. Comparison of present attachment cross sections (thick line) with the microwave-cavity pulsed radiolysis method (thin line). Error limits in the present data are shown, and cross sections for energies below 0.005 eV are extrapolated (. . .). Values of the parameters a, λ, γ1 and γ2 are given table 2 (use γ1 = 8.32 × 10-2 eV and γ2 = 0.166 eV). The value of the normalization constant N was derived from the measured rate constant by Sunagawa and Shimamori of 1.2 × 10-7cm3 s-1 and is N = 1.671 × 10-14 cm2. From figure 1 one sees good agreement between the two sets of data. We point out two typographical errors in table 2: the entry 0.41h should read 0.41 and the entry 0.0542 should read 0.113. Reference Sunagawa T and Shimamori H 1995 Int. J. Mass. Specrom. Ion. Proc. 149/150 123-9