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Resonant laser ioni...
Resonant laser ionization of neptunium: investigation on excitation schemes and the first ionization potential
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Kaja, Magdalena (author)
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Studer, Dominik (author)
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Berg, Felix (author)
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Berndt, Sebastian (author)
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Duellmann, Christoph E. (author)
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Kneip, Nina (author)
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Reich, Tobias (author)
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- Urquiza-Gonzalez, Mitzi, 1995 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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Wendt, Klaus (author)
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: EUROPEAN PHYSICAL JOURNAL D. - 1434-6060 .- 1434-6079. ; 78:5
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https://doi.org/10.1...
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Abstract
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- The atomic structure of neptunium (Np) was investigated by two-step resonance ionization spectroscopy. The study involved exploring ground-state transitions as well as following transitions to high-lying states just below the ionization potential (IP) or auto-ionizing states above the IP. That resulted in the identification of two-step ionization schemes, suitable for trace analysis and nuclear structure investigations. The lifetimes of two excited states located at 25,342.48 cm(-1) and 25,277.64 cm(-1) were determined as 230(12) ns and 173(9) ns, respectively. Because of the absence of Rydberg series in wide-ranging spectra recorded, the first IP was determined through the field ionization of high-lying, weakly-bound states using a well-controlled static electric field. By applying the saddle-point model, an IP value of 50,535.54(15) cm(-1) [6.265608(19) eV] was derived. This value agrees with the current literature value of 50,535(2) cm(-1), while providing a more than ten times higher precision.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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