Translational energy distributions and angular difference Doppler profiles of the excited hydrogen atom produced ine‐C2H4collisions: Dissociation dynamics of ethylene

1992 ◽  
Vol 97 (9) ◽  
pp. 6276-6282 ◽  
Author(s):  
Nobuaki Yonekura ◽  
Keiji Nakashima ◽  
Teiichiro Ogawa
Keyword(s):  
Hydrogen Atom ◽  
Translational Energy ◽  
Angular Difference ◽  
Energy Distributions ◽  
Dissociation Dynamics

Angular difference Doppler profiles of the excited hydrogen atom produced in eCH4 collisions and dissociation dynamics of methane

1987 ◽  
Vol 113 (1) ◽  
pp. 65-72 ◽  
Author(s):  
Teiichiro Ogawa ◽  
Hideaki Tomura ◽  
Keiji Nakashima ◽  
Hirofumi Kawazumi
Keyword(s):  
Hydrogen Atom ◽  
Angular Difference ◽  
Dissociation Dynamics

Scattering of Low-Energy (5-12 eV) C2D4•+ Ions from Room-Temperature Carbon Surfaces

2008 ◽  
Vol 73 (6-7) ◽  
pp. 755-770 ◽  
Author(s):  
Andriy Pysanenko ◽  
Ján Žabka ◽  
Zdeněk Herman
Keyword(s):  
Survival Probability ◽  
Room Temperature ◽  
Incident Angle ◽  
Pyrolytic Graphite ◽  
Carbon Surface ◽  
Translational Energy ◽  
Energy Distributions ◽  
Surface Mass ◽  
Fragment Ions ◽  
Product Ions

The scattering of the hydrocarbon radical cation C2D4•+ from room-temperature carbon (highly oriented pyrolytic graphite, HOPG) surface was investigated at low incident energies of 6-12 eV. Mass spectra, angular and translational energy distributions of product ions were measured. From these data, information on processes at surfaces, absolute ion survival probability, and kinematics of the collision was obtained. The projectile ion showed both inelastic, dissociative and reactive scattering, namely the occurrence of H-atom transfer reaction with hydrocarbons present on the room-temperature carbon surface. The absolute survival probability of the ions for the incident angle of 30° (with respect to the surface) decreased from about 1.0% (16 eV) towards zero at incident energies below 10 eV. Estimation of the effective surface mass involved in the collision process led to m(S)eff of about 57 a.m.u. for inelastic non-dissociative collisions of C2D4•+ and of about 115 a.m.u. for fragment ions (C2D3+, C2D2•+) and ions formed in reactive surface collisions (C2D4H+, C2D2H+, contributions to C2D3+ and C2D2•+). This suggested a rather complex interaction between the projectile ion and the hydrocarbon-covered surface during the collision.

Charge Transfer Between CO22+ and Ar or Ne at Collision Energies 3-10 eV

2003 ◽  
Vol 68 (1) ◽  
pp. 178-188 ◽  
Author(s):  
Libor Mrázek ◽  
Ján Žabka ◽  
Zdeněk Dolejšek ◽  
Zdeněk Herman
Keyword(s):  
Charge Transfer ◽  
Excited States ◽  
Ground State ◽  
Scattering Method ◽  
Translational Energy ◽  
Centre Of Mass ◽  
Energy Distributions ◽  
Zener Model ◽  
Beam Scattering ◽  
Product Ions

The beam scattering method was used to investigate non-dissociative single-electron charge transfer between the molecular dication CO22+ and Ar or Ne at several collision energies between 3-10 eV (centre-of-mass, c.m.). Relative translational energy distributions of the product ions showed that in the reaction with Ar the CO2+ product was mainly formed in reactions of the ground state of the dication, CO22+(X3Σg-), leading to the excited states of the product CO2+(A2Πu) and CO2+(B2Σu+). In the reaction with Ne, the largest probability had the process from the reactant dication excited state CO22+(1Σg+) leading to the product ion ground state CO2+(X2Πg). Less probable were processes between the other excited states of the dication CO22+, (1∆g), (1Σu-), (3∆u), also leading to the product ion ground state CO2+(X2Πg). Using the Landau-Zener model of the reaction window, relative populations of the ground and excited states of the dication CO22+ in the reactant beam were roughly estimated as (X3Σg):(1∆g):(1Σg+):(1Σu-):(3∆u) = 1.0:0.6:0.5:0.25:0.25.

scholarly journals Preliminary Study on Kinetic Energy Distributions of Ar+ Fragments Resulting From Ar3+ Visible Photodissociation

1991 ◽  
Vol 11 (2) ◽  
pp. 95-98 ◽  
Author(s):  
F. X. Gadea ◽  
J. Durup
Keyword(s):  
Kinetic Energy ◽  
Theoretical Study ◽  
Initial Conditions ◽  
Dipole Moments ◽  
Energy Distributions ◽  
Transition Dipole ◽  
Transition Dipole Moments ◽  
Dissociation Dynamics ◽  
Total Energies ◽  
Preliminary Study

According to a strategy which involves DIM excitonic Hamiltonian, DIM-like transition dipole moments, realistic dynamical propagations with the HWD method (Hemiquantal dynamics with the Whole DIM basis), and the Wigner function to weight the initial conditions, a non-empirical theoretical study of the kinetic energy distribution of the Ar+ photofragments is performed for three total energies. The results illustrate the dominant symmetric stretching motion and the importance of non-adiabatic effects in the Ar3+ dissociation dynamics.

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