- Conference date: 28-30 July 2005
- Location: Buenos Aires (Argentina)
An adequate description of electron‐impact excitation of mercury (Hg) 6s6p levels usually demands the application of the intermediate coupling scheme, leading to a singlet‐triplet mixing between the LS‐coupled 1,3P1 configurations. However, for small scattering angles and impact energies well above the excitation threshold (i.e. 15 eV), the singlet part of the mixture is predicted to be dominant. Hence, for Hg 6s6p 1P1 an almost ‘coherent excitation’ by electron‐impact can be expected for the energetic and angular range stated above. Contrary to this expectation previous measurements by Murray et al and Masters et al seemed to show a significant loss of coherence. We present results from our recent electron‐photon coincidence measurements and compare them with the results of theoretical calculations using R‐matrix and RDWBA methods. Overall a good agreement is shown, thus confirming our expectations.
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