ISSN:
1434-601X
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract We have measured differential cross sections for the scattering of laser-excited Na(32 P 3/2) by Ne. The rapid oscillations in the experimental scattering patterns measured at high angular resolution cannot be explained semi-classically on the basis of the elastic approximation. We therefore apply a collision model proposed by MasnouSeeuws et al. [1] which takes into account the partial uncoupling of the electron-spin from the orbital angular momentum. The results obtained with this model are — for the first time — compared quantitatively with the result of a fully quantummechanical close-coupling calculation and with our experimental data. In both cases good agreement is found. This proves that the observed oscillatory structure is strongly influenced byΠ-∑ interferences which — due to spin uncoupling — do not cancel even if the scattering signals are summed over all final fine-structure states. Our semi-classical analysis is also applied to the Na(32 P 1/2)-Ar and K(42 P 3/2)-Ar scattering experiments reported by Düren et al. [2, 3]. The agreement with regard to the frequency of the oscillatory structure indicates that here too spin uncoupling causes theΠ-∑ interferences to appear in the differential cross sections.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01411920
