Electron-impact-induced allowed transitions between triplet states of H{sub 2}
- IMIP CNR, Sezione territoriale di Bari, Bari (Italy)
Electron-impact-induced excitation and dissociation processes between the excited triplet states a {sup 3}{sigma}{sub g}{sup +}{yields}d {sup 3}{pi}{sub u}, c {sup 3}{pi}{sub u}{yields}h {sup 3}{sigma}{sub g}{sup +}, and c {sup 3}{pi}{sub u}{yields}g {sup 3}{sigma}{sub g}{sup +} of molecular hydrogen are studied by using the impact-parameter method. The cross sections for {nu}{sub i}-{nu}{sub f} resolved vibronic transitions between states have been calculated in the energy range from threshold to 100 eV; their maxima being located in the region of 5-10 eV. A special treatment was required for the transition to the h {sup 3}{sigma}{sub g}{sup +} state, whose adiabatic potential-energy curve possesses a barrier at the internuclear distance of about 5a{sub 0}, sustaining three quasi-bound vibrational states with widths of 5.3x10{sup -12}, 1.5x10{sup -3}, and 42.0 cm{sup -1}, respectively. The quasistationary character of these vibrational states is taken into account when calculating the c {sup 3}{pi}{sub u}{yields}h {sup 3}{sigma}{sub g}{sup +} excitation and dissociation cross sections.
- OSTI ID:
- 20640729
- Journal Information:
- Physical Review. A, Vol. 69, Issue 2; Other Information: DOI: 10.1103/PhysRevA.69.022706; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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