High-precision electron affinity of oxygen.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
07 Oct 2022
07 Oct 2022
Historique:
received:
10
05
2022
accepted:
19
09
2022
entrez:
7
10
2022
pubmed:
8
10
2022
medline:
8
10
2022
Statut:
epublish
Résumé
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
Identifiants
pubmed: 36207329
doi: 10.1038/s41467-022-33438-y
pii: 10.1038/s41467-022-33438-y
pmc: PMC9546871
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
5906Subventions
Organisme : Vetenskapsrådet (Swedish Research Council)
ID : 2017-00621
Organisme : Vetenskapsrådet (Swedish Research Council)
ID : 2021-00155
Informations de copyright
© 2022. The Author(s).
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