We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
High-precision electron affinity of oxygen.
- Authors
Kristiansson, Moa K.; Chartkunchand, Kiattichart; Eklund, Gustav; Hole, Odd M.; Anderson, Emma K.; de Ruette, Nathalie; Kamińska, Magdalena; Punnakayathil, Najeeb; Navarro-Navarrete, José E.; Sigurdsson, Stefan; Grumer, Jon; Simonsson, Ansgar; Björkhage, Mikael; Rosén, Stefan; Reinhed, Peter; Blom, Mikael; Källberg, Anders; Alexander, John D.; Cederquist, Henrik; Zettergren, Henning
- Abstract
Negative ions are important in many areas of science and technology, e.g., in interstellar chemistry, for accelerator-based radionuclide dating, and in anti-matter research. They are unique quantum systems where electron-correlation effects govern their properties. Atomic anions are loosely bound systems, which with very few exceptions lack optically allowed transitions. This limits prospects for high-resolution spectroscopy, and related negative-ion detection methods. Here, we present a method to measure negative ion binding energies with an order of magnitude higher precision than what has been possible before. By laser-manipulation of quantum-state populations, we are able to strongly reduce the background from photodetachment of excited states using a cryogenic electrostatic ion-beam storage ring where keV ion beams can circulate for up to hours. The method is applicable to negative ions in general and here we report an electron affinity of 1.461 112 972(87) eV for 16O. High-precision measurements are useful to find isotopic shifts and electron correlation. Here the authors measure electron affinity and hyperfine splitting of atomic oxygen with higher precision than previous studies.
- Subjects
ELECTRON affinity; ANIONS; HYPERFINE coupling; ELECTRON configuration; ION energy; STORAGE rings; ION beams
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-33438-y