High-resolution x-ray spectra from highly charged Si, S and Cl ions showing evidence of fluorescence active resonant states

28th International Conference on Photonic, Electronic and Atomic Collisions

Kasthurirangan, S.^1 ; Saha, J.K.^2 ; Agnihotri, A.N.^3 ; Banerjee, A.^3 ; Kumar, A.^4 ; Misra, D.^3 ; Santos, J.P.^5 ; Costa, A.M.^5 ; Indelicato, P.^6 ; Mukherjee, T.K.^2 ; Tvibedi, L.C.^3

Institute of Chemical Technology, Matunga, Mumbai

400019, India^1

Narula Institute of Technology, Kolkata

700109, India^2

Tata Institute of Fundamental Research, Mumbai

400005, India^3

Bhabha Atomic Research Centre, Mumbai

400085, India^4

Departamento de Fisica, Universidade Nova de Lisboa, Caparica

2829-516, Portugal^5

Laboratoire Kastler Brossel, Ecole Normale Superieure, Universite P. et M. Curie, Paris, France^6

关键词: He and Li like ions;    He-like ions;    High resolution;    Line positions;    Resonant state;    State of the art;    Theoretical calculations;    X-ray spectra;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/13/132027/pdf
DOI  :  10.1088/1742-6596/488/13/132027

来源: IOP

【 摘 要 】

We have measured the x-ray spectra from highly charged Si, S and Cl ions in collisions with thin foils using a high-resolution x-ray spectrometer. The observed lines have been assigned to various transitions in H-, He- and Li-like ions. For proper identification of line positions, the theoretical calculations have been carried out using a state-of-the-art MCDF code including QED effects, with which the experimental data is in excellent agreement. We have also observed, for the first time, x-rays arising out of the decay of long-lived resonant states in the He-like ions of each species. Details will be presented.