SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 59: Structure and Dynamics of Nuclei XI
HK 59.5: Vortrag
Donnerstag, 23. März 2023, 15:15–15:30, SCH/A118
Development of a new γ-γ angular correlation analysis method using asymmetric ring of clover detectors — •Lukas Knafla1, Arwin Esmaylzadeh1, Andreas Harter1, Jan Jolie1, Ulli Köster2, Mario Ley1, Caterina Michelagnoli2, and Jean-Marc Régis1 — 1Institut für Kernphysik, Universität zu Köln — 2Institut Laue-Langevin, Grenoble, Frankreich
A new method for γ-γ angular correlation analysis using a symmetric ring of HPGe clover detectors is
presented. Pairwise combinations of individual crystals are grouped based on the geometric properties of
the spectrometer, constrained by a single variable parameterization. The corresponding effective interaction angles between crystal pairs, as well as the attenuation coefficients are extracted directly from the measured experimental data. Angular correlation coefficients, parameter
uncertainties and parameter co-variances are derived using a Monte-Carlo approach, considering all sources
of statistical uncertainty. The general applicability of this approach is demonstrated by reproducing known
multipole mixing ratios in 177Hf, 152Gd and 116Sn, populated by either β-decay or (n, γ)-reactions, measured at the Institut Laue-Langevin, using the EXILL&FATIMA spectrometer and different configurations of the
FIPPS instrument. The derived mixing ratios are in excellent agreement with adopted literature values with
comparable or better precision [1].
[1] L. Knafla et al., Nucl. Instrum. Methods Phys. Res. A 1042 (2022)