Abstract
Coupling an ion trap with synchrotron radiation is shown here to be a powerful approach to measure photoionization cross sections on ionic species relaxed in their ground state. The photoionization efficiency curve of ions stored in a Fourier transform ion cyclotron resonance ion trap was recorded at ELETTRA in the 20–23 eV photon energy range. Absolute cross sections were derived by comparison of the photoionization yield of with measurements from the ASTRID merged-beam experiment. Multiconfiguration Dirac-Fock calculations were performed for the interpretation of these new data.
- Received 22 January 2008
DOI:https://doi.org/10.1103/PhysRevLett.100.223001
©2008 American Physical Society