| Autor: |
Alfredo Galindo-Uribarri, Yuan Liu, Elisa Romero Romero, Daniel W. Stracener |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2045-2322 |
| DOI: |
10.1038/s41598-021-01886-z |
| Popis: |
Abstract Three-step resonance photoionization spectra of plutonium have been studied with Ti:Sapphire lasers for the development of efficient laser ionization schemes for ultra-trace analysis of Pu isotopes by resonance ionization mass spectrometry. We observed eighteen intermediate excited states of even parity in the energy range 35568–36701 $${\text {cm}}^{-1}$$ cm - 1 , thirteen of them have not been previously documented, and a larger number of high-lying excited states and autoionizing states of odd-parity between 48238 and 49510 $${\text {cm}}^{-1}$$ cm - 1 . Three-color, three-photon ionization schemes via six intermediate states were evaluated under similar ion source operating conditions. This led to a highly efficient three-step scheme with an overall ionization efficiency of $$51.1 \pm 1.3\%$$ 51.1 ± 1.3 % , which is an order of magnitude improvement over the previously reported ionization efficiency for Pu. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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