ON THE STICKING MECHANISM IN PRESENCE OF INELASTIC SCATTERING AND SELECTIVE ADSORPTION RESONANCES

1999 ◽  
Vol 13 (12) ◽  
pp. 1477-1487
Author(s):  
G. DUTTAMUDI ◽  
S. K. ROY
Keyword(s):  
Inelastic Scattering ◽  
Temperature Variation ◽  
Born Approximation ◽  
Selective Adsorption ◽  
Bound State ◽  
Distorted Wave ◽  
Distorted Wave Born Approximation ◽  
T Matrix ◽  
Solid Argon ◽  
Sticking Coefficients

The sticking coefficients of He 4 on graphite and solid argon surfaces are calculated in presence of bound state resonances. It is observed that the over-counting of the scattering events which make the sticking coefficients greater than unity in these systems under usual distorted wave Born approximation (DWBA), can be removed by considering the exact T-matrix in presence of bound state resonances. This also gives rise to interesting results on temperature variation of sticking coefficients.

ROLE OF THE HE ATOM SURFACE POTENTIAL ON THE CU(001) PHONON DETERMINATION

1994 ◽  
Vol 01 (01) ◽  
pp. 67-74 ◽  
Author(s):  
A. FRANCHINI ◽  
G. SANTORO ◽  
V. BORTOLANI ◽  
A. BELLMAN ◽  
D. CVETKO ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Inelastic Scattering ◽  
Rayleigh Wave ◽  
Interaction Potential ◽  
Born Approximation ◽  
Large Momentum ◽  
Distorted Wave ◽  
Distorted Wave Born Approximation ◽  
He Atom

We present new measurements of He atom inelastic scattering from the (001) surface of Copper. Our results confirmed the recent data obtained in Gottingen and show that at large momentum transfer in the [Formula: see text] direction the intensity of the longitudinal resonance is larger than that of the Rayleigh wave. We interpret these results by evaluating the reflection coefficient in the Distorted Wave Born Approximation. By taking the He surface interaction potential as a sum of nonspherical pairwise potential we are able to explain quantitatively the behavior of the experimental spectra.

Multi-channel distorted-wave Born approximation for rovibrational transition rates in molecular collisions

2021 ◽  
Vol 155 (3) ◽  
pp. 034105
Author(s):  
Taha Selim ◽  
Arthur Christianen ◽  
Ad van der Avoird ◽  
Gerrit C. Groenenboom
Keyword(s):  
Born Approximation ◽  
Transition Rates ◽  
Distorted Wave ◽  
Distorted Wave Born Approximation ◽  
Molecular Collisions

Analysing powers and differential cross sections of (3He,p) reactions on 6Li and 7Li at low energy

1995 ◽  
Vol 73 (1-2) ◽  
pp. 74-84 ◽  
Author(s):  
D. Baddou ◽  
C. Rioux ◽  
R. J. Slobodrian ◽  
J. M. Nelson
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Born Approximation ◽  
Low Energy ◽  
Angular Distributions ◽  
Differential Cross Sections ◽  
Distorted Wave ◽  
Distorted Wave Born Approximation ◽  
Nucleon Transfer ◽  
Cluster Transfer

Angular distributions of the differential cross sections and analysing powers were measured at an energy of 4.6 MeV. The results are compared with the distorted wave Born approximation predictions for two-nucleon transfer and for a deuteron-cluster transfer. The agreement is qualitative at best, and a discussion of alternatives to improve it is presented.

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