Abstract
We have observed polarization of emission lines for 1s22s5g(1G4)-1s22s6h(1H5) and 1s22s6h(1H5)-1s22s7i(1I6) transitions of O4+ produced by double electron capture in O6+ + He collisions in the energy range of 60-120 keV. The polarization degree was 0.2-0.23 for the 5g-6h transition and 0.28-0.33 for the 6h-7i transition. The polarization degree of the former transition with the cascading effect by the latter transition removed was estimated and found to be nearly zero with uncertainties of ±0.2. This indicates that the 7i or higher excited state ions produced by dielectronic interaction during the electron capture is aligned to the m = 0 magnetic substate, as in the case of single electron capture. The polarization degrees are almost independent of energy, in contrast to the energy dependent emission cross sections. This suggests that the production dynamics is almost the same over our energy range.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
