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. 2021 Dec 6;11:23432. doi: 10.1038/s41598-021-01886-z

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© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2021

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Three-step ionization scheme for $^{242}$ Pu investigated. The first excited state energy 23765.98(2) ${cm}^{- 1}$ is from Ref.²⁶ and the IP value is from the NIST database⁴³. The laser wavelength is in vacuum.