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HK: Fachverband Physik der Hadronen und Kerne

HK 53: Hadron Structure and Spectroscopy X

HK 53.3: Vortrag

Mittwoch, 30. März 2022, 16:45–17:00, HK-H9

Lifetime Measurement in ²⁰⁶Rn and ²⁰²Pb via γ-γ Fast-Timing Spectroscopy — •Mario Ley, Arwin Esmaylzadeh, Lukas Knafla, Jean-Marc Régis, and Jan Jolie — Institut für Kernphysik, Universität zu Köln

Lifetimes of the first excited 2⁺ , 4⁺ , 6⁺ , 8⁺ states in ²⁰⁶Rn and the 2⁺ and 4⁺ states in ²⁰²Pb were measured using the γ-γ fast-timing technique with a detector array consisting of LaBr₃(Ce) and HPGe detectors. The experiment was performed at the FN-Tandem accelerator of the Institute for Nuclear Physics at the University of Cologne. The well established Generalized Centroid Difference (GCD) method [1], which is suitable for the determination of lifetimes in the pico- to nanosecond regime, was used to determine the lifetimes.

The derived reduced transition probabilities are discussed with regard to the onset of collective structures for low-lying excited states in ²⁰⁶Rn and the results are compared with shell-model calculations based on the Nucleon Pair Approximation [2].

[1] J.-M. Régis et al., Nucl. Instrum. Methods Phys. Res. A 726 (2013)
[2] Z. Y. Xu, Y. Lei, Y. Zhao, A. Arima, et al., Phys. Rev. C, 79:054315, (2009)