RADIATIVE AND AUGER DECAY PROBABILITIES, BRANCHING RATIOS AND FLUORESCENCE YIELDS OF THE BE-LIKE (1S(2)4 4/') DOUBLY-EXCITED STATES IN NE6+/

Radiative and Auger transitions energies, decay rates, Auger branching ratios as well as fluorescence yields have been calculated for the Be -like (1s(2)4l4l' doubly excited states in Ne6+. Th, calculations have been performed in the intermediate coupling scheme. These extension t heoretical results have been compared with our high resolution soft X- ray and Auger electron electra arising from Ne8+ + He and Ne8+ + H-2 c ollisions. The comparison of our experimental and data confirms that t he 1s(2)4l4l states of the Ne6+ decay predominantly into the 1s(2)2p e psilon l '' continuum, while the branching ratios associated with the 1s(2)2s epsilon 1 '' continuum are small. This is of fundamental impor tance for the spectroscopic analysis and collision dynamics of double electron capture processes, in particular for the Ne + H-2 collision s ystem, where the 1s(2)4l4l' states are most populated.