State-Selected Associative Ionisation as a Probe of the Molecular Dissociative Channels
Abstract
Associative ionization (AI): A + B* → AB+ + e− and dissociative recombination (DR) share the same reaction channels, although the precise dynamics depend on the actual collision taking place. The large angular momentum put into the system by heavy particle collisions does indeed obliterate the subtle role of closed Rydberg channels, as these resonances are displaced by the centrifugal energy. However, the systematic study of AI processes at low energy provides us with additional information on the reaction channels, their branching into atomic products, and the preferred symmetries of DR. The effect of isotope substitution on total cross sections, together with the development of a new diagnostic tool to measure the internal energy of AI products, give an unambiguous identification of the reaction pathways.
Keywords
Total Cross Section Internuclear Distance Potential Energy Curve Associative Ionization Dissociative RecombinationPreview
Unable to display preview. Download preview PDF.
References
- 1.G. Poulaert, F. Brouillard, W. Claeys, J. W. McGowan and G. Van Wassenhove, J. Phys. B: At. Mol. Opt. Phys. 11, L67l (1978).Google Scholar
- 2.X. Urbain, A. Comet, F. Brouillard and A. Giusti-Suzor, Phys. Rev. Lett. 66, 1685 (1991).ADSCrossRefGoogle Scholar
- 3.F. Brouillard and X. Urbain, Rearrangement Processes Involving Hydrogen and Helium Atoms and Ions, in Atomic and Molecular Processes in Fusion Edge Plasmas, ed. by R. Janev (Plenum Press, New York and London, 1995), p. 309.Google Scholar
- 4.V. Lorent and P. Antoine, J. Phys. B: At. Mol. Opt. Phys. 24, 227 (1991).ADSCrossRefGoogle Scholar
- 5.V. Sidis, C. Kubach and D. Fussen, Phys. Rev. A 27, 2431 (1983).ADSCrossRefGoogle Scholar
- 6.P. E. Siska, Rev. Mod. Phys. 65, 337 (1993) and references therein.ADSCrossRefGoogle Scholar
- 7.J. Lorenzen, H. Hotop, M.-W. Ruf and H. Morgner, Z. Phys. A 297, 19 (1980).ADSCrossRefGoogle Scholar
- 8.J. J. Blangé, J. M. Zijlstra, A. Amelink, X. Urbain, H. Rudolph, P. van der Straten, H. C. W. Beijerinck and H. G. M. Heideman, Phys. Rev. Lett. 78, 3089 (1997).ADSCrossRefGoogle Scholar
- 9.D. P. de Bruijn, J. Neuteboom, V. Sidis and J. Los, Chem. Phys. 85, 215 (1984).CrossRefGoogle Scholar
- 10.T. Odagiri, N. Uemura, K. Koyama, M. Ukai, N. Kouchi and Y. Hatano, J. Phys. B : At. Mol. Opt. Phys. 29, 1829 (1996).ADSCrossRefGoogle Scholar
- 11.L. D. A. Siebbeles and C. Le Sech, J. Phys. B : At. Mol. Opt. Phys. 27, 4443 (1994).ADSCrossRefGoogle Scholar
- 12.Z. Amitay, A. Baer, M. Dahan, J. Levin, Z. Vager, D. Zajfman, L. Knoll, M. Lange, D. Schwalm, R. Wester, A. Wolf, I. F. Schneider and A. Suzor-Weiner, Phys. Rev. A 60, 3769 (1999);ADSCrossRefGoogle Scholar
- S. Krohn, Z. Amitay, A. Baer, D. Zajfman, M. Lange, L. Knoll, J. Levin, D. Schwalm, R. Wester and A. Wolf, Phys. Rev A 62, 032713 (2000).ADSCrossRefGoogle Scholar
- 13.H. Takagi, Theoretical Problems in the Dissociative Recombination of H2+ + e, in Dissociative Recombination : Theory, Experiment and Applications, ed. by B. R. Rowe, J. B. A. Mitchell and A. Canosa, (Plenum Press, New York,l993), p. 75.CrossRefGoogle Scholar
- 14.K. Nakashima, H. Takagi and H. Nakamura , J. Chem. Phys. 86, 726 (1987).ADSCrossRefGoogle Scholar
- 15.D. Zajfman, Z. Amitay, M. Lange, U. Hechtfischer, L. Knoll, D. Schwalm, R. Wester, A. Wolf and X. Urbain, Phys. Rev. Lett. 79, 1829 (1997).ADSCrossRefGoogle Scholar
- 16.X. Urbain, A. Giusti-Suzor, D. Fussen and C. Kubach, J. Phys. B : At. Mol. Opt. Phys. 19, L273 (1986).ADSCrossRefGoogle Scholar
- 17.S. L. Guberman, Phys. Rev. A 49, R1531 (1994).CrossRefGoogle Scholar
- 18.J. Semaniak, S. Rosén, G. Sundström, C. Strömholm, S. Datz, H. Danared, M. af Ugglas, M. Larsson, W. J. van der Zande, Z. Amitay, U. Hechtfischer, M. Grieser, R. Repnow, M. Schmidt, D. Schwalm, R. Wester, A. Wolf and D. Zajfman, Phys. Rev. A 54, R4617 (1996).ADSCrossRefGoogle Scholar