A study on the transition between seniority-type and collective excitations in 204Po and 206Po

Milena Stoyanova; Georgi Rainovski; Jan Jolie; Norbert Pietralla; Andrey Blazhev; Martin Djongolov; Arwin Esmaylzadeh; Lisa Gerhard; Kalin Gladnishki; Vasil Karayonchev; James Keatings; Ralph Kern; Diana Kocheva; Thorsten Kröll; Konstantin Mashtakov; Oliver Möller; Jean-Marc Régis; Marcus Scheck; Kerstin Schomacker; Jacqueline Sinclair; Chistian Sürder; Volker Werner; Johannes Wiederhold

doi:10.1051/epjconf/201819403002

All issues

Volume 194 (2018)

EPJ Web Conf., 194 (2018) 03002

Abstract

Open Access

Issue		EPJ Web Conf. Volume 194, 2018 International Conference on Nuclear Structure and Related Topics (NSRT18)


Article Number		03002
Number of page(s)		4
Section		Nuclear spectroscopy
DOI		https://doi.org/10.1051/epjconf/201819403002
Published online		14 November 2018

EPJ Web of Conferences 194, 03002 (2018)
https://doi.org/10.1051/epjconf/201819403002

A study on the transition between seniority-type and collective excitations in ²⁰⁴Po and ²⁰⁶Po

Milena Stoyanova¹^*, Georgi Rainovski¹, Jan Jolie³, Norbert Pietralla², Andrey Blazhev³, Martin Djongolov¹, Arwin Esmaylzadeh³, Lisa Gerhard³, Kalin Gladnishki¹, Vasil Karayonchev³, James Keatings⁴, Ralph Kern², Diana Kocheva¹, Thorsten Kröll², Konstantin Mashtakov⁴, Oliver Möller², Jean-Marc Régis³, Marcus Scheck⁴, Kerstin Schomacker³, Jacqueline Sinclair⁴, Chistian Sürder², Volker Werner² and Johannes Wiederhold²

¹ Faculty of Physics, St. Kliment Ohridski University of Sofia, 1164 Sofia, Bulgaria
² Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany s
³ Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany
⁴ School of Engineering & Computing, University of the West of Scotland, Paisley PA1 2BE, United Kingdom

^* e-mail: milenas@phys.uni-sofia.bg

Published online: 14 November 2018

Abstract

Low-lying yrast states in ²⁰⁴Po and ²⁰⁶Po have been investigated by the γ-γ fast timing technique with LaBr₃(Ce) detectors. Excited states of these nuclei were populated in the ¹⁹⁷Au(¹¹B,4n) and the ¹⁹⁸Pt(¹²C,4n) fusion-evaporation reactions, respectively, at the FN-Tandem Facility at the University of Cologne. The lifetimes of the 4⁺₁ states in both nuclei were measured, along with an upper limit for the 2⁺₁ state in ²⁰⁴Po. The preliminary results are discussed in the scope of the systematic behavior of the transition strengths between yrast states in polonium isotopes.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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