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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Structure and Dynamics of Nuclei VII

HK 37.6: Vortrag

Mittwoch, 1. April 2020, 18:00–18:15, J-HS E

How well do we know nuclear magnetic moments: The cases of ²⁰⁷Pb and ²⁰⁹Bi — •Wilfried Nörtershäuser¹, Verena Fella¹, Leonid V. Skripnikov², Magnus R. Buchner³, H. Lars Deubner³, Florian Kraus³, Alexei F. Privalov¹, Vladimir M. Shabaev², and Michael Vogel¹ — ¹TU Darmstadt — ²St. Petersburg State University — ³Philipps-Universität Marburg

Tabulated nuclear magnetic moments of stable isotopes are often used as reference values, e.g., in studies of short-lived isotopes. Results from nuclear magnetic resonance measurements are often provided with very high accuracy but are affected with chemical and diamagnetic shifts which are not always well under control. We will report on two extreme cases recently investigated. Motivated by discrepancies between QED calculations and laser spectroscopic investigations on highly charged ions [1], we performed new NMR studies on ²⁰⁷Pb and ²⁰⁹Bi [2] where we found significant discrepancies to the tabulated values [3].
[1] J. Ullmann et al., Nature Comm. 8 15484 (2017).
[2] L. Skripnikov et al., Phys. Rev. Lett. 120, 093001 (2018).
[3] N. Stone, Atomic Data Nuclear Data Tables 90, 75 (2005).
This work was supported by BMBF under contract 05P19RDFAA.