SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 74: Poster
HK 74.51: Poster
Donnerstag, 23. März 2023, 17:30–19:00, HSZ EG
New evidence for alpha clustering structure in the ground state band of 212Po — •Martin von Tresckow for the IFIN212Po collaboration — IKP TU Darnstadt, Schlossgartenstraße 9, 64289 Darmstadt
212Po has two-protons and neutrons outside the doubly-magic nucleus 208Pb and it may be assumed that the nuclear structure can be well described within the shell-model. But various experimental properties, such as the short-lived ground state, are better described by an α-clustering model. The B(E2) values of the decays of the low-lying yrast states are an important finger print to describe the structure of 212Po. Especially the missing B(E2; 41+ → 21+) value is important in this discussion. We have performed an α-transfer experiment to investigate excited states of 212Po and determine the lifetimes using the ROSPHERE γ-ray detector array at IFIN-HH in Magurele, Romania. This array consisted of 15 HPGe detectors and 10 LaBr3(Ce) scintillator detectors and was supplemented with the SORCERER particle-detector array. The combination of γ-ray and the particle detectors was an important tool to determine the mean lifetimes of all ground-state band levels up to the 8+ state applying the fast-timing method [Ma. von Tresckow et al., PLB 821, 136624 (2021)]. I will present our lifetime analysis and discuss the results within the shell-model and α-clustering model. *Supported by BMBF under Verbundprojekt 05P2021 (ErUM-FSP T07) via grant 05P21RDFN1