Session C5: Rydberg Atoms and Cold Plasmas
2:00 PM–4:00 PM, Wednesday, May 26, 2010
Room: Arboretum I-III
Chair: Thomas Gallagher, University of Virginia
Abstract ID: BAPS.2010.DAMOP.C5.8
Abstract: C5.00008 : Measurement of the Polarizability of Ba$^{2+}$
3:24 PM–3:36 PM
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Abstract 
Authors:
Erica L. Snow
(SUNY Fredonia)
Shannon L. Woods
(Colorado State University)
Mark E. Hanni
(Colorado State University)
Stephen R. Lundeen
(Colorado State University)
Charles W. Fehrenbach
(Kansas State University)
The dipole polarizability of Ba$^{2+}$ was determined by spectroscopy of high-L Rydberg levels of Ba$^{+}$, using the Resonant Excitation Stark Ionization Spectroscopy (RESIS) method. Beams of Ba$^{2+}$, obtained by sputtering solid Ba inside a 14 GHz permanent magnet ECR source at Kansas State University, captured a single electron from a dense Rb 12F Rydberg target, forming highly excited Rydberg levels of Ba$^{+}$. Rydberg levels of Ba$^{+}$ with n=19 or 20 and L=5,6,7,8, and 9 were excited to a much higher level using a Doppler-tuned CO$_{2}$ laser and then detected by Stark ionization. The resolved fine structure of these levels, analyzed with the long-range polarization model, determined the polarizability of the ground state of Ba$^{2+}$.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.DAMOP.C5.8