Observations of Bound and Resonance States of Ce$^{- }$
POSTER
Abstract
The negative ion of cerium has been investigated with tunable infrared laser photodetachment spectroscopy. The relative cross section for neutral atom production was measured with a crossed laser-ion beam apparatus over selected photon energy ranges between 0.56 -- 0.7 eV. The spectrum reveals several sharp peaks due to negative ion resonances and possible bound-bound transitions in Ce$^{-}$. The newly observed transitions, together with our previous measurements [1], provide insight into the rich near-threshold spectrum of this lanthanide negative ion.\\[4pt] [1] C.W. Walter, N.D. Gibson, C. M. Janczak, K.A. Starr, A.P. Snedden, R.L. Field III, and P. Andersson, \textit{Physical Review A }\textbf{76}, 052702 (2007).
*This material is based on work supported by the National Science Foundation under Grant No. 0757976. DH acknowledges support from the Swedish Research Council and Denison University.