Electron Attachment to Aliphatic Hydrocarbons of the Form n-CNH2N+1Br(N = 2–6 and 8) II. A Swarm-Beam Study
1971; American Institute of Physics; Volume: 54; Issue: 11 Linguagem: Inglês
10.1063/1.1674744
ISSN1520-9032
AutoresL. G. Christophorou, J. G. Carter, Patrick Collins, A. A. Christodoulides,
Tópico(s)Mass Spectrometry Techniques and Applications
ResumoA swarm-beam study has been made of brominated hydrocarbons of the form n-CNH2N+1Br(N = 2–6 and 8). At energies below ∼ 3 eV the abundant ion found in the beam study was Br−. The dissociative attachment cross section σda(ε) peaked at 0.76, 0.74, 0.73, 0.70, 0.71, and 0.13 eV, and had peak values equal to 3.95, 4.14, 5.50, 6.13, 7.41, and 32.2 × 10−18 cm2 for N = 2–6 and 8, respectively. A small decrease has been observed in the cross-section width with increasing reduced mass Mr of the R(= n − CNH2N+1)–Br molecules. This and the increase in σda with Mr are discussed within the resonance-scattering-theory treatment of dissociative electron attachment to diatomic molecules. For some of the molecules studied, potential energy diagrams for RBr and RBr−* and separation and autoionization lifetimes for RBr−* are given.
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