کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5428434 | 1508674 | 2014 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Polarization of the nf â 3d (n=4, 5, 6) x-rays from tungsten ions following electron-impact excitation and dielectronic recombination processes Polarization of the nf â 3d (n=4, 5, 6) x-rays from tungsten ions following electron-impact excitation and dielectronic recombination processes](/preview/png/5428434.png)
- EIE and REC cross sections of W42+-W46+ ions are calculated for the first time.
- Polarizations of strong nfâ3d x-ray lines from EIE and DR are calculated.
- The polarizations for the same line but from EIE and DR are found to be different.
- 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.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 141, July 2014, Pages 31-39