Study of the transition from single-particle to collective behaviour in Po isotopes with N < 126

Diana Kocheva; Georgi Rainovski; Jan Jolie; Marcel Beckers; Andrey Blazhev; Arwin Esmaylzadeh; Christoph Fransen; Kalin Gladnishki; Norbert Pietralla; Marcus Scheck; Franziskus Spee; Milena Stoyanova; Volker Werner; Giovanni De Gregorio; Angela Gargano; B. Alex Brown

doi:10.1051/epjconf/202532901008

All issues

Volume 329 (2025)

EPJ Web Conf., 329 (2025) 01008

Abstract

Open Access

Issue		EPJ Web Conf. Volume 329, 2025 17^th International Symposium on Capture Gamma Ray Spectroscopy and Related Topics (CGS17)


Article Number		01008
Number of page(s)		5
Section		Experimental Nuclear Structure
DOI		https://doi.org/10.1051/epjconf/202532901008
Published online		25 June 2025

EPJ Web of Conferences 329, 01008 (2025)
https://doi.org/10.1051/epjconf/202532901008

Study of the transition from single-particle to collective behaviour in Po isotopes with N < 126

Diana Kocheva¹^*, Georgi Rainovski¹, Jan Jolie², Marcel Beckers², Andrey Blazhev², Arwin Esmaylzadeh², Christoph Fransen², Kalin Gladnishki¹, Norbert Pietralla³, Marcus Scheck⁴, Franziskus Spee², Milena Stoyanova¹, Volker Werner³, Giovanni De Gregorio⁵^,6, Angela Gargano⁶ and B. Alex Brown⁷

¹ Faculty of Physics, St. Kliment Ohridski University of Sofia, 1164 Sofia, Bulgaria
² Institut für Kernphysik, Universität zu Köln, 50937 Cologne, Germany
³ Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
⁴ CEPS, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
⁵ Dipartimento di Matematica e Fisica, Università degli Studi della Campania "Luigi Vanvitelli", I-81100 Caserta, Italy
⁶ INFN Sezione di Napoli, IT-80126 Napoli, Italy
⁷ Michigan State University, East Lansing, MI, Michigan 48824-1321, USA

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

Published online: 25 June 2025

Abstract

In this study, the lifetime of the 2⁺₁ state of ²⁰⁶Po was measured by means of the Recoil Distance Doppler Shift method. The determined B(E2; 2⁺₁ → 0⁺₁) value shows that the 2⁺₁ state of ²⁰⁶Po is of collective nature. The results were compared with shell-model calculations based on two different effective interactions.

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