A1 Journal article (refereed)
Observation of Collisional De-Excitation Phenomena in Plutonium (2022)

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

JYU authors or editors

Publication details

All authors or editors: Raggio, Andrea; Pohjalainen, Ilkka; Moore, Iain D.

Journal or series: Atoms

eISSN: 2218-2004

Publication year: 2022

Publication date: 20/04/2022

Volume: 10

Issue number: 2

Article number: 40

Publisher: MDPI AG

Publication country: Switzerland

Publication language: English

DOI: https://doi.org/10.3390/atoms10020040

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/80817

Abstract

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.

Keywords: nuclear physics; plutonium; research equipment

Free keywords: collisional de-excitation; actinide elements; resonance laser ionization; gas cell

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Ministry reporting: Yes

Reporting Year: 2022

JUFO rating: 1