Resonant ionization spectroscopy of autoionizing Rydberg states in cobalt and redetermination of its ionization potential
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Physic Division
- Johannes Gutenberg Univ., Mainz (Germany). Inst for Physics
We obtained multi-step resonance ionization spectroscopy of cobalt using a hot-cavity laser ion source and three Ti:Sapphire lasers. Furthermore, the photoionization spectra revealed members of five new autoionizing Rydberg series that originate from three different lower levels of 3d74s5s h4F9/2, 3d74s4d f4G11/2, and 3d74s4d f4H13/2 and converge to the first four excited states of singly ionized Co. Our analyses of the Rydberg series yield 63564.689 0.036 cm-1 as the first ionization potential of Co, which is an order of magnitude more accurate than the previous estimation. Using a three-step resonance ionization scheme that employs an autoinizing Rydberg state in the last transition, we obtained an overall ionization efficiency of about 18% for Co.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1361301
- Journal Information:
- Journal of Physics. B, Atomic, Molecular and Optical Physics, Vol. 50, Issue 7; ISSN 0953-4075
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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