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Title: High efficiency resonance ionization of palladium with Ti:sapphire lasers

Here, we present the development and testing of highly efficient excitation schemes for resonance ionization of palladium. To achieve the highest ionization efficiencies, a high-power, high repetition rate Ti:sapphire laser system was used and 2-step, 3-step and 4-step schemes were investigated and compared. Starting from different excited steps, the frequencies of the final ionization steps were tuned across the full accessible spectral range of the laser system, revealing several autoionizing Rydberg series, which converge towards the energetically higher lying state 4d 9 2D 3/2 of the Pd + ion ground state configuration. Through proper choice of these excitation steps, we developed a highly efficient, fully resonant 3-step excitation scheme, which lead to overall efficiencies of 54.3(1.4)% and 59.7(2.1)%, measured at two independent mass separator setups. Lastly, to our knowledge, these are presently the highest efficiency values ever achieved with a resonance ionization laser ion source.
Authors:
 [1] ; ORCiD logo [2] ;  [1] ;  [1] ;  [1]
  1. Johannes Gutenberg University Mainz (Germany)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Physics. B, Atomic, Molecular and Optical Physics
Additional Journal Information:
Journal Volume: 49; Journal Issue: 18; Journal ID: ISSN 0953-4075
Publisher:
IOP Publishing
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS
OSTI Identifier:
1490599
Alternate Identifier(s):
OSTI ID: 1319946

Kron, Tobias, Liu, Yuan, Richter, S., Schneider, F., and Wendt, K.. High efficiency resonance ionization of palladium with Ti:sapphire lasers. United States: N. p., Web. doi:10.1088/0953-4075/49/18/185003.
Kron, Tobias, Liu, Yuan, Richter, S., Schneider, F., & Wendt, K.. High efficiency resonance ionization of palladium with Ti:sapphire lasers. United States. doi:10.1088/0953-4075/49/18/185003.
Kron, Tobias, Liu, Yuan, Richter, S., Schneider, F., and Wendt, K.. 2016. "High efficiency resonance ionization of palladium with Ti:sapphire lasers". United States. doi:10.1088/0953-4075/49/18/185003. https://www.osti.gov/servlets/purl/1490599.
@article{osti_1490599,
title = {High efficiency resonance ionization of palladium with Ti:sapphire lasers},
author = {Kron, Tobias and Liu, Yuan and Richter, S. and Schneider, F. and Wendt, K.},
abstractNote = {Here, we present the development and testing of highly efficient excitation schemes for resonance ionization of palladium. To achieve the highest ionization efficiencies, a high-power, high repetition rate Ti:sapphire laser system was used and 2-step, 3-step and 4-step schemes were investigated and compared. Starting from different excited steps, the frequencies of the final ionization steps were tuned across the full accessible spectral range of the laser system, revealing several autoionizing Rydberg series, which converge towards the energetically higher lying state 4d9 2D3/2 of the Pd+ ion ground state configuration. Through proper choice of these excitation steps, we developed a highly efficient, fully resonant 3-step excitation scheme, which lead to overall efficiencies of 54.3(1.4)% and 59.7(2.1)%, measured at two independent mass separator setups. Lastly, to our knowledge, these are presently the highest efficiency values ever achieved with a resonance ionization laser ion source.},
doi = {10.1088/0953-4075/49/18/185003},
journal = {Journal of Physics. B, Atomic, Molecular and Optical Physics},
number = 18,
volume = 49,
place = {United States},
year = {2016},
month = {9}
}