Observation of Collisional De-Excitation Phenomena in Plutonium
Raggio, A., Pohjalainen, I., & Moore, I. D. (2022). Observation of Collisional De-Excitation Phenomena in Plutonium. Atoms, 10(2), Article 40. https://doi.org/10.3390/atoms10020040
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2022Copyright
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
A program of research towards the high-resolution optical spectroscopy of actinide elements for the study of fundamental nuclear structure is currently ongoing at the IGISOL facility of the University of Jyväskylä. One aspect of this work is the development of a gas-cell-based actinide laser ion source using filament-based dispensers of long-lived actinide isotopes. We have observed prominent phenomena in the resonant laser ionization process specific to the gaseous environment of the gas cell. The development and investigation of a laser ionization scheme for plutonium atoms is reported, focusing on the effects arising from the collision-induced phenomena of plutonium atoms in helium gas. The gas-cell environment was observed to greatly reduce the sensitivity of an efficient plutonium ionization scheme developed in vacuum. This indicates competition between resonant laser excitation and collisional de-excitation by the gas atoms, which is likely being enhanced by the very high atomic level density within actinide elements.
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https://converis.jyu.fi/converis/portal/detail/Publication/118955268
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Research Council of Finland; European CommissionFunding program(s)
Academy Project, AoF; MSCA Innovative Training Networks (ITN)
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about funding
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 861198–LISA–H2020-MSCA-ITN-2019, as well as from the Academy of Finland under project number 339245.License
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