03-01-2014
The international team formed by Indian, French and the Portuguese investigator José Paulo Santos, CFA-FCT and FCT Department of Physics, has for the first time ever measured and calculated the transition energy of doubly excited states, considered until now non-existing, in Si, S and Cl ions. The results were published in December 2013 in Physical Review Letters, a prestigious top-ranked journal.
The calculated values, which differ by less than 0.2% from the experimental results, made possible to determine the influence of relativistic effects in the analyzed states. The doubly excited states are of great importance in astrophysics and diagnosis of plasmas. This work was funded by the Foundation for Science and Technology, through two research projects.
Link to the article: http://prl.aps.org/abstract/PRL/v111/i24/e243201
Link to the CFA-FCT: http://www.cfa.fct.unl.pt
