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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Structure and Dynamics of Nuclei VII

HK 37.1: Gruppenbericht

Mittwoch, 1. April 2020, 16:30–17:00, J-HS E

Study of electromagnetic transition rates in the N=126 isotones 210-Po, 211-At and 213-Fr. — •Jan Jolie¹, Vasil Karayonchev¹, Lisa Kornwebel¹, Diana Kocheva², Andrey Blazhev¹, Arwin Esmaylzadeh¹, Lukas Knafla¹, Jean-Marc Régis¹, Georgi Rainovski², and Pieter Van Isacker³ — ¹IKP, Universität zu Köln, Zülpicher Str. 77, 50937 Köln — ²Faculty of Physics, St. KlimenOhridski University of Sofia, 1164 Sofia, Bulgaria — ³GANIL, Bd. Henri Becquerel BP55027, 14076 Caen, France

Lifetimes of excited states in 210-Po, 211-At and 213-Fr were measured at the FN Tandem accelerator of the Institute for Nuclear Physics, University of Cologne. The nuclei of interest were populated using two-proton transfer reactions and fusion-evaporation reactions. The lifetimes were obtained using the Doppler Shift Attenuation (DSA) and the Recoil Distance Doppler Shift (RDDS) methods and using the electronic gamma-gamma fast timing technique. The experimental electromagnetic transition rates are compared to shell-model calculations, using the modified Kuo-Herling interaction in a multi-j model space. For 211-At they are also compared to a semi-empirical calculation for three particles in a single j=9/2 shell.