Absolute cross-sections and kinetic energy release distributions for electron-impact dissociation of D-3(+)
(2009) Journal of Physics B: Atomic, Molecular and Optical Physics — Vol. 42, n° 7, p. 75201 (2009)
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- Authors
Defrance, Pierre 
- Abstract
- Absolute cross-sections for electron-impact dissociation of D-3(+) leading to the formation of D+ and D-2(+) products have been measured by applying the animated electron-ion beam method in the energy range from the respective thresholds up to 2.5 keV. The maximum total cross-sections are observed to be (13.9 +/- 1.1) x 10(-17) cm(2) and (8.2 +/- 0.1) x 10(-17) cm(2) (around 50 eV) for D+ and for D-2(+) fragments, respectively. The present results are in a satisfactory agreement with those of experiments performed at storage ring facilities in the low energy range (<30 eV). The data of D+ formation especially show resonant dissociative excitation playing a significant role in the collision energy range below the vertical excitation energy for the lowest electronic transition. The yields of fast D+ and D-2(+) ions have been measured; these energetic dissociations are mainly ascribed to dissociative ionization. For each fragment, absolute cross-sections are determined separately for dissociative excitation and for dissociative ionization processes. Kinetic energy release distributions are seen to extend from 0 to 16 eV both for D+ and for D-2(+) fragments. Present energy thresholds and kinetic energy release results are compared with available published data, allowing in some cases identification of fragmentation patterns and of molecular states contributing to observed processes.
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Citations
Lecointre, J., El Ghazaly, M. O., Jureta, J., Belic, D. S., Urbain, X., & Defrance, P. (2009). Absolute cross-sections and kinetic energy release distributions for electron-impact dissociation of D-3(+). Journal of Physics B: Atomic, Molecular and Optical Physics, 42(7), 75201. https://doi.org/10.1088/0953-4075/42/7/075201 (Original work published 2009)