Hyperfine interaction with the 229Th nucleus and its low-lying isomeric state

Müller, Robert A.; Maiorova, Anna V.; Fritzsche, Stephan; Volotka, Andrey V.; Beerwerth, Randolf; Przemyslaw, Glowacki; Thielking, Johannes; Meier, David-Marcel; Okhapkin, Maksim; Peik, Ekkehard; Surzhykov, Andrey

doi:https://doi.org/10.1103/physreva.98.020503

Zugriffsnummer	40905
Dokumenttyp	Zeitschriftenartikel
Peer Review	mit Peer Review
Sprache	Englisch
Titel	Hyperfine interaction with the ²²⁹Th nucleus and its low-lying isomeric state
Autor(in); Institution	Müller, Robert A.; FPM, Fundamentale Physik für Metrologie, PTB-Braunschweig; Technische Universität Braunschweig, Braunschweig, GERMANY Maiorova, Anna V.; Center for Advanced Studies, Peter the Great St. Petersburg State Polytechnical University, St. Petersburg, RUSSIA Fritzsche, Stephan; Helmholtz Institute Jena, Jena, GERMANY; Friedrich-Schiller-University Jena, Jena, GERMANY Volotka, Andrey V.; Helmholtz Institute Jena, Jena, GERMANY Beerwerth, Randolf; Helmholtz Institute Jena, Jena, GERMANY; Friedrich-Schiller-University Jena, Jena, GERMANY Przemyslaw, Glowacki; 4.4, Zeit und Frequenz, PTB-Braunschweig Thielking, Johannes; 4.4, Zeit und Frequenz, PTB-Braunschweig Meier, David-Marcel; 4.4, Zeit und Frequenz, PTB-Braunschweig Okhapkin, Maksim; 4.4, Zeit und Frequenz, PTB-Braunschweig Peik, Ekkehard; 4.4, Zeit und Frequenz, PTB-Braunschweig Surzhykov, Andrey; FPM, Fundamentale Physik für Metrologie, PTB-Braunschweig; Technische Universität Braunschweig, Braunschweig, GERMANY
Quelle/Jahr	Physical Review A: 98 (2018), 2, 1 - 5
Artikelnummer	020503(R)
ISSN	2469-9926 (PRINT) ; 2469-9934 (ONLINE)
DOI	https://doi.org/10.1103/physreva.98.020503
Verlag	Melville, NY: American Institute of Physics
Freie Schlagworte	Hyperfine structure ; Thorium ; magnetic dipole moment ; electric quarupole moment
Zusammenfassung	The thorium nucleus with a mass number A = 229 has attracted much interest because its extremely low-lying first excited isomeric state at about 8 eV opens the possibility for the development of a nuclear clock. Both the energy of this state as well as the nuclear magnetic dipole and electric quadrupole moment of the ^229mTh isomer are subjects of intense research. The latter can be determined by investigating the hyperfine structure of thorium atoms or ions. Due to its electronic structure and the long lifetime of the nuclear isomeric state, Th²⁺ is especially suitable for such kinds of studies. In this Rapid Communication, we present a combined experimental and theoretical investigation of the hyperfine structure of the ²²⁹Th²⁺ ion in the nuclear ground state, where a good agreement between theory and experiment is found. For the nuclear excited state we use our calculations in combinationwith recentmeasurements [J. Thielking et al., Nature (London) 556, 321 (2018)] to obtain the nuclear dipole moment of the isomeric state μ_iso = -0.35μN,which is in contradiction to the theoretically predicted value of μ_iso = -0.076μ_N [A. M. Dykhne and E. V. Tkalya, JETP Lett. 67, 251 (1998)].

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Müller, R. A., Maiorova, A. V., Fritzsche, S., Volotka, A. V., Beerwerth, R., Przemyslaw, G., Thielking, J., Meier, D.-M., Okhapkin, M., Peik, E., & Surzhykov, A. (2018). Hyperfine interaction with the ²²⁹Th nucleus and its low-lying isomeric state. Physical Review A, 98(2), 1–5. https://doi.org/10.1103/physreva.98.020503

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