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Full-Text Articles in Physical Sciences and Mathematics
Rates Of Dissociative Attachment Of Electrons To Excited H2 And D2, J. M. Wadehra
Rates Of Dissociative Attachment Of Electrons To Excited H2 And D2, J. M. Wadehra
Physics and Astronomy Faculty Research Publications
Calculations are reported of the contributions of the lowest 2Σ+ u and 2Σ+ g resonant states to the rates of dissociative attachment of electrons to H2 and D2. For all electron temperatures, the rate is significantly enhanced by vibrational and rotational excitation of the initial molecule. Typically, for an electron temperature of 1.5 eV, the attachment rates for various (v, J) levels are, in cm3 sec−1, 5.4×10−15 for (0,0), 7.2×10−11 for (0,20), and 7.8×10−9 for (8,0), for H2; and 4.5×10−17 for (0,0), 1.4×10−14 for (0,20), and 6.0×10−9 for (11,0), for D2.
Low-Energy Collisions Of D+ With D And He++ With He, J. M. Wadehra
Low-Energy Collisions Of D+ With D And He++ With He, J. M. Wadehra
Physics and Astronomy Faculty Research Publications
Quantum-mechanical calculations for differential cross sections and various transport cross sections describing the thermal-energy collisions of D+ with D and He2+ with He are presented. Lowest-order Viehland-Mason theory is used to calculate mobility of D+ in D. The zero-field mobility at 77, 303, and 10000 K is, in units of cm2V−1s−1, 10.5, 7.0, and 2.1, respectively.
Dissociative Attachment And Vibrational Excitation In Low-Energy Collisions Of Electrons With H2 And D2, J. N. Bardsley, J. M. Wadehra
Dissociative Attachment And Vibrational Excitation In Low-Energy Collisions Of Electrons With H2 And D2, J. N. Bardsley, J. M. Wadehra
Physics and Astronomy Faculty Research Publications
A semiempirical analysis is made of the contributions of the two lowest resonant states to dissociative attachment and vibrational excitation in low-energy collisions of electrons with H2 and D2. The resonance models are based both on ab initio calculations and on fits to experimental data. The dissociative-attachment cross section near threshold is enhanced significantly by vibrational or rotational excitation of the initial molecule. Near 10 eV, contributions from both resonances are required to explain the observed cross sections for vibrational excitation.
Resonant Contributions To Single Charge Transfer Between He++ And He, J. N. Bardsley, James S. Cohen, J. M. Wadehra
Resonant Contributions To Single Charge Transfer Between He++ And He, J. N. Bardsley, James S. Cohen, J. M. Wadehra
Physics and Astronomy Faculty Research Publications
Energy levels and lifetimes are calculated for the resonant states that are important in radiative single charge transfer in He2+-He collisions at thermal energies. The resonant contribution to the charge-transfer rate decreases with increasing temperature and is approximately 12% of the total rate at 300 K.