Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5428434 | Journal of Quantitative Spectroscopy and Radiative Transfer | 2014 | 9 Pages |
â¢EIE and REC cross sections of W42+-W46+ ions are calculated for the first time.â¢Polarizations of strong nfâ3d x-ray lines from EIE and DR are calculated.â¢The polarizations for the same line but from EIE and DR are found to be different.â¢The present results are expected be used for plasma diagnosis in ITER.
Electron-impact excitation and resonant electron capture cross sections to the specific magnetic sublevels as well as the polarization of the strong nfâ3d (n=4, 5, 6) x-ray emitted from Ni-like through Ge-like tungsten ions have been studied systematically by using a fully relativistic distorted-wave method. We compare the polarizations for the same x-ray but from the above two different processes for the first time. It is found that the polarization degrees of x-ray following both the electron-impact excitation and the dielectronic recombination are totally different. Because the electron-impact excitation dominates in hot and dense plasmas and the dielectronic recombination plays a key role in low-density plasmas which are cooled and recombining by capturing continuum electrons, we hope that the specific plasmas conditions could be assessed by using these x-ray polarizations.