[Step back on the COMPLETE sequential path to the module Positioning (link type: SQ-BACK/is part of; target: A08-m6)] [Next step on the COMPLETE sequential path: to the module Acknowledgements (link type: SQ-NEXT/essay-next; target: A08-m6b)]
[Step back on the ESSAY-TYPE sequential path to the module Meta-information (link type: ESSAY-BACK; target: A08-m5bii2)] [Next step on the ESSAY-TYPE sequential path: to the module Central problem (link type: ESSAY-NEXT/sq-next; target: A08-m6b)]
[Show the characterisation of the module]
[Show the navigation menu of the module]
[To the Map of contents]
[Legenda]


[Contents
of the thesis]
[Comments on this module]




























[Step back on the COMPLETE sequential path to the module Positioning (link type: SQ-BACK/is part of; target: A08-m6)] [Next step on the COMPLETE sequential path: to the module Acknowledgements (link type: SQ-NEXT/essay-next; target: A08-m6b)]
[Step back on the ESSAY-TYPE sequential path to the module Meta-information (link type: ESSAY-BACK; target: A08-m5bii2)] [Next step on the ESSAY-TYPE sequential path: to the module Central problem (link type: ESSAY-NEXT/sq-next; target: A08-m6b)]
[Show the characterisation of the module]
[Show the navigation menu of the module]
[To the Map of contents]
[Legenda]


[Contents
of the thesis]
[Comments on this module]

Findings=A08-m6a

The differential cross sections of the process Na + I Na+ + I- on the energy range from 13 to 85 eV have been measured using hybrid crossed beam/gas target atomic beam setup [particulars on the experimental methods (link type: 'is detailed in/depends on'; target: A08-m3a)] . They have also been calculated using a semi-classical LZ model with the lowest-order stationary-phase approximation, uniform rainbow approximation and JWKB phase shifts [particulars on the theoretical methods (link type: 'is detailed in/depends on'; target: A08-m3c)] . We conclude that for these cross sections:

  1. the Landau-Zener theory can be applied by the simple use of the transition probability [The theory is clarified in a mesoscopic Theoretical methods module (clarified in/wider range/project'; target: MESO-m3c-LZ)] [The applicability of the theory is justified in the Interpretation (link type: 'is detailed in/argued in/depends on'; target: A08-m5bii1)] in order to calculate the energy-dependent and impact-parameter dependent differential cross section contributions A value of the parameter H12 can be estimated from the measurements. [This estimation is performed in the Interpretation (link type: 'is detailed in/clarified in/depends on'; target: A08-m5bi#H12)];
  2. the rotational coupling makes clear the large contribution to the differential cross section for collisions with large impact parameters [The Interpretation justifies this statement (link type: 'is detailed in/argued in/depends on'; target: A08-m5bii2)] , leading to an experimental estimation of Hrot. [This estimation is performed in the Interpretation (link type: 'is detailed in/clarified in/depends on'; target: A08-m5bii2#Hrot)];
  3. impact-parameter method and classical deflection function [These methods are clarified in a Theoretical methods module (clarified in/depends on'; target: A08-m3ci)] give the correct angular positions of special features of the differential cross section due to scattering from the known ionic potential curve and from the known part of the covalent potential. [The applicability of the methods is justified in the Interpretation (link type: is detailed in/argued in/depends on'; target: A08-m5bii1)];
  4. lowest-order stationary-phase approximation, uniform rainbow approximation and JWKB phase shifts [These approximations methods are clarified in a Theoretical methods module (clarified in/depends on'; target: A08-m3cii)] give a perfect description of the primary rainbow and some low-number supernumeraries, but a rather serious discrepancy arises with the interference structure when collisions with large impact parameters contribute to the differential cross section. The discrepancy is dependent on the kinetic energy. [The discrepancies are shown in the Interpretation (link type: 'is detailed in/clarified/depends on'; target: A08-m5bii1)];
  5. interference structure of the contributions due to scattering with small impact parameters leads to an estimation of the covalent repulsive potential relative to the known ionic repulsive potential. It is expected that the objection of conclusion 4 to the interference structure does not hold because of the very good agreement of calculated and measured energy dependence of the repulsive interference structure. [agreement shown in the Interpretation (link type: 'is detailed in/clarified in/depends on'; target: A08-m5bii1)].