Motapon, Ousmanou
Tamo, Francois Olivier Waffeu
Urbain, Xavier
[UCL]
Schneider, Ioan F.
The multichannel quantum-defect theory is used to investigate the role of the numerous couplings between rovibrational states in the dissociative recombination and superelastic collisions of H-2(+) with low-energy electrons, within different molecular electronic symmetries. All the paths accessible are considered. In the case of the singlet gerade symmetry of the neutral system, for example, not only the dominant path, (1)Sigma(+)(g), is taken into account, but also (1)Pi(+)(g), rotationally coupled to (1)Sigma(+)(g), via a frame transformation from the interaction region to the external one. The initial vibrational states investigated are upsilon(+)(i)=0-4. The final rate coefficients are obtained as weighted sums including the so-called ortho-para effect, at room temperature, over all the relevant rotational initial states N-i(+), which vary from 0 to 12. The results show that the consideration of rotational effects give a much better overall agreement of the dissociative recombination rate coefficients with experiment, and that, for superelastic collisions, these effects can be used to account, at least partly, for the discrepancies between our former calculations and experiment, which showed a strong vibrational relaxation of H-2(+).
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- Schneider I F, Dulieu O, Giusti-Suzor A, The role of Rydberg states in H+2dissociative recombination with slow electrons, 10.1088/0953-4075/24/12/002
- Schneider I. F., Dulieu O., Giusti-Suzor A., Resonances in the dissociative recombination ofH2+with slow electrons, 10.1103/physrevlett.68.2251
- Forck P., Grieser M., Habs D., Lampert A., Repnow R., Schwalm D., Wolf A., Zajfman D., Dissociative recombination of coldHD+at the Test Storage Ring, 10.1103/physrevlett.70.426
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- Amitay Z., Dissociative Recombination of HD+ in Selected Vibrational Quantum States, 10.1126/science.281.5373.75
- Amitay Z., Baer A., Dahan M., Levin J., Vager Z., Zajfman D., Knoll L., Lange M., Schwalm D., Wester R., Wolf A., Schneider I. F., Suzor-Weiner A., Dissociative recombination of vibrationally excitedHD+: State-selective experimental investigation, 10.1103/physreva.60.3769
- Schneider I F, Strömholm C, Carata L, Urbain X, Larsson M, Suzor-Weiner A, Rotational effects in dissociative recombination: theoretical study of resonant mechanisms and comparison with ion storage ring experiments, 10.1088/0953-4075/30/11/019
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- Vâlcu B., Schneider I.F., Raoult M., Strömholm C., Larsson M., Suzor-Weiner A., Rotational effects in low energy dissociative recombination of diatomic ions, 10.1007/s100530050065
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- M. C. Stroe, Rom. Rep. Phys., 57, 801 (2005)
- Ngassam V., Motapon O., Florescu A., Pichl L., Schneider I. F., Suzor-Weiner A., Vibrational relaxation and dissociative recombination ofH2+induced by slow electrons, 10.1103/physreva.68.032704
- Krohn S., Amitay Z., Baer A., Zajfman D., Lange M., Knoll L., Levin J., Schwalm D., Wester R., Wolf A., Electron-induced vibrational deexcitation ofH2+, 10.1103/physreva.62.032713
- Giusti A, A multichannel quantum defect approach to dissociative recombination, 10.1088/0022-3700/13/19/025
- Jungen Ch., Atabek O., Rovibronic interactions in the photoabsorption spectrum of molecular hydrogen and deuterium: An application of multichannel quantum defect methods, 10.1063/1.433881
- Fano U., Quantum Defect Theory oflUncoupling inH2as an Example of Channel-Interaction Treatment, 10.1103/physreva.2.353
- Sidis V, Lefebvre-Brion H, A 'quasi-diabatic' representation for inelastic collisions Application to the scattering of He+by Ne, 10.1088/0022-3700/4/8/008
- Guberman Steven L., The doubly excited autoionizing states of H2, 10.1063/1.444882
- Tennyson Jonathan, RESONANCE PARAMETERS AND QUANTUM DEFECTS FOR SUPEREXCITED H2, 10.1006/adnd.1996.0023
- Ngassam V., Florescu A., Pichl L., Schneider I. F., Motapon O., Suzor-Weiner A., The short-range reaction matrix in MQDT treatment of dissociative recombination and related processes, 10.1140/epjd/e2003-00248-8
- Chang E. S., Fano U., Theory of Electron-Molecule Collisions by Frame Transformations, 10.1103/physreva.6.173
- Seaton M J, Quantum defect theory, 10.1088/0034-4885/46/2/002
- B. H. Bransden, Physics of Atoms and Molecules (2003)
- Schneider I. F., Dulieu O., Giusti-Suzor A., Roueff E., Dissociate recombination of H2(+) molecular ions in hydrogen plasmas between 20 K and 4000 K, 10.1086/173948
- Takagi H, Kosugi N, Dourneuf M Le, Dissociative recombination of CH+, 10.1088/0953-4075/24/3/026
- Detmer T., Schmelcher P., Cederbaum L. S., Hydrogen molecule in a magnetic field: The lowest states of theΠmanifold and the global ground state of the parallel configuration, 10.1103/physreva.57.1767
- Ross S., Jungen Ch., Quantum-defect theory of double-minimum states inH2, 10.1103/physrevlett.59.1297
- Schneider I. F., Orel A. E., Suzor-Weiner A., Channel Mixing Effects in the Dissociative Recombination ofH3+with Slow Electrons, 10.1103/physrevlett.85.3785
- Schneider I F, Rabadán I, Carata L, Andersen L H, Suzor-Weiner A, Tennyson J, Dissociative recombination of NO+: calculations and comparison with experiment, 10.1088/0953-4075/33/21/326
- Schneider I. F., Suzor‐Weiner A., Channel‐Mixing Effects on Dissociative Recombination, 10.4006/1.3028821
- Kokoouline V., Greene Chris H., Esry B. D., Mechanism for the destruction of H3+ ions by electron impact, 10.1038/35091025
- dos Santos Samantha Fonseca, Kokoouline Viatcheslav, Greene Chris H., Dissociative recombination of H3+ in the ground and excited vibrational states, 10.1063/1.2784275
- Čurík R., Greene Chris, Indirect Dissociative Recombination ofLiH+Molecules Fueled by Complex Resonance Manifolds, 10.1103/physrevlett.98.173201
- Schneider I F, Dulieu O, Giusti-Suzor A, The role of Rydberg states in H+2dissociative recombination with slow electrons, 10.1088/0953-4075/24/12/002
- Nakashima Keiji, Takagi Hidekazu, Nakamura Hiroki, Dissociative recombination of H+2, HD+, and D+2 by collisions with slow electrons, 10.1063/1.452275
- Zhaunerchyk V., Al-Khalili A., Thomas R. D., Geppert W. D., Bednarska V., Petrignani A., Ehlerding A., Hamberg M., Larsson M., Rosen S., van der Zande W. J., Rotational State Effects in the Dissociative Recombination ofH2+, 10.1103/physrevlett.99.013201
Bibliographic reference |
Motapon, Ousmanou ; Tamo, Francois Olivier Waffeu ; Urbain, Xavier ; Schneider, Ioan F.. Decisive role of rotational couplings in the dissociative recombination and superelastic collisions of H-2(+) with low-energy electrons. In: Physical review. A, Atomic, molecular, and optical physics, Vol. 77, no. 5 (2008) |
Permanent URL |
http://hdl.handle.net/2078.1/36529 |