33 research outputs found
ITFITS Model for Vibration-Translation Energy Partitioning in Atom- Polyatomic Molecule Collisions
Photodissociation Spectroscopy of Cyanogen Halides in the Extreme Vacuum Ultraviolet Region
Photodissociation of cyanogen halides, ClCN, BrCN and ICN, was investigated using synchrotron radiation. The absolute cross-sections for the photoabsorption and the production of CN(B2Ī£+-X2Ī£+) emission were determined in the wavelength range of 50-180
Energy transfer in hyperthermal Xe-graphite surface scattering
The scattering of a hyperthermal XeĀ from a graphite (0001) surface
has been studied using a molecular beam-surface scattering technique
and molecular dynamics (MD) simulations.
The angular and velocity distributions of scattered Xe atoms
were measured at incidence energies from 0.45 to 3.5Ā eV,
three incidence angles of 15Ā°, 35Ā° and 60Ā°
and the surface temperatures of 300Ā K and 550Ā K.
The observed time-of-flight spectra exhibit a sharp velocity distribution
with only one velocity component, which is ascribed
to the direct inelastic scattering process.
The angle-resolved energy ratios of the mean final translational energy
over the mean incidence energy Ef/Ei agree well
with those predicted based on the assumption of the conservation
of the momentum parallel to the surface.
The Hard-Cube model, where the mass of the cube is approximately 310Ā u,
has reproduced the angle-resolved flux distributions of scattered Xe atoms.
In the Hard-Cube model
almost 80% of the normal component of the incidence translational energy is found
to be lost in collision.
The MD simulations reproduce well the experimental results
by using the Brenner potential for intralayer CĀ atoms
and a Lennard-Jones potential for interlayer CāC pair interactions