Abstract
We measured the degree of polarization of the 3s 2S1/2–3p 2P3/2 transition of C3+ ions produced by one-electron transfer in the collisions of C4+ ions with H2 at energies of 30–80 keV by visible spectroscopy. The results in this work were compared with the previous works for the alignment of 3p states of lithium-like carbon ions by means of VUV spectroscopy. We also compared these with the degree of polarization of the isoelectronic transitions of other lithium-like ions, N4+ and O5+, and found the correlation between the polarization degree and the potential crossing distance in which the one-electron transfer reaction takes place. This collision system dependence in the polarization of the 3s 2S1/2–3p 2P3/2 transition was discussed with respect of the linear Stark effect by the residual target ion.
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