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- Title
Absolute cross sections of electron attachment to molecular clusters. Part II: Formation of (H<sub>2</sub>O), (N<sub>2</sub>O), and (N<sub>2</sub>).
- Authors
Vostrikov, A.; Dubov, D.
- Abstract
Absolute cross sections σ−( E, N) of electron attachment to clusters (H2O) N , (N2O) N , and (N2) N for varying electron energy E and cluster size N are measured by using crossed electron and cluster beams in a vacuum. Continua of σ−( E) are found that correlate well with the functions of electron impact excitation of molecules’ internal degrees of freedom. The electron is attached through its solvation in a cluster. In the formation of (H2O), (N2O), and (N2), the curves σ−( N) have a well-defined threshold because of a rise in the electron thermalization and solvation probability with N. For (H2O)900, (N2O)350, and (N2)260 clusters at E = 0.2 eV, the energy losses by the slow electron in the cluster are estimated as 3.0 × 107, 2.7 × 107, and 6.0 × 105 eV/m, respectively. It is found that the growth of σ− with N is the fastest for (H2O) N and (N2) N clusters at E → 0 as a result of polarization capture of the s-electron. Specifically, at E = 0.1 eV and N = 260, σ− = 3.0 × 10−13 cm2 for H2O clusters, 8.0 × 10−14 cm2 for N2O clusters, and 1.4 × 10−15 cm2 for N2 clusters; at E = 11 eV, σ− = 9.0 × 10−16 cm2 for (H2O)200 clusters, 2.4 × 10−14 cm2 for (N2O)350 clusters, and 5.0 × 10−17 cm2 for (N2)260 clusters; finally, at E = 30 eV, σ− = 3.6 × 10−17 cm2 for (N2O)10 clusters and 3.0 × 10−17 cm2 for (N2)125 clusters.
- Subjects
ELECTRONS; MICROCLUSTERS; SOLVATION; THERMAL neutrons; ENERGY dissipation; IONIZATION (Atomic physics)
- Publication
Technical Physics, 2006, Vol 51, Issue 12, p1537
- ISSN
1063-7842
- Publication type
Article
- DOI
10.1134/S1063784206120012