Mainz 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 8: Structure and Dynamics of Nuclei II
HK 8.1: Vortrag
Montag, 28. März 2022, 14:00–14:15, HK-H7
New evidence for alpha clustering structure in the ground state band of 212Po — •Martin von Tresckow for the IFIN-HH212Po collaboration — IKP TU 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 predicted 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 are important in this discussion. We have performed an α-transfer experiment to excited 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 system. 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. This work is financially supported by EURONS2, IFA via grant 04FAIR/2020, MCDI via grant PN19060102, UK-STFC via grant ST/P005101/1, Ministry of Science and Higher Education of the Russian Federation under contract No. 075-10-2020-117.