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Universität zu Köln

Mathematisch-Naturwissenschaftliche FakultätInstitut für Kernphysik

Institut für Kernphysik

Topthemen

Millionenförderung für Kölner Kernphysik
Kernphysik zum Handanlegen
FN-Tandem Beschleuniger
Kombination von γ- und Teilchenspektroskopie
MINIBALL @ HIE-ISOLDE
Advanced GAmma Tracking Array

Neueste Publikationen

Alle Publikationen

Investigation of gamma softness: Lifetime measurements in 104,106Ru. Esmaylzadeh, A.; Blazhev, A.; Nomura, K.; Jolie, J.; Beckers, M.; Fransen, C.; Gerst, R.-B.; Harter, A.; Karayonchev, V.; Knafla, L.; Ley, M.; von Spee, F. in Phys. Rev. C (2022). 106(6) 064323.

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Development of a new γ–γ angular correlation analysis method using a symmetric ring of clover detectors. Knafla, L.; Esmaylzadeh, A.; Harter, A.; Jolie, J.; Köster, U.; Ley, M.; Michelagnoli, C.; Régis, J.-M. in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2022). 1042 167463.

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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 based on symmetry considerations. 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.
The DESPEC setup for GSI and FAIR. Mistry, A.K.; Albers, H.M.; Arıcı, T.; Banerjee, A.; Benzoni, G.; Cederwall, B.; Gerl, J.; Górska, M.; Hall, O.; Hubbard, N.; Kojouharov, I.; Jolie, J.; Martinez, T.; Podolyák, Zs.; Regan, P.H.; Tain, J.L.; Tarifeno-Saldivia, A.; Schaffner, H.; Werner, V.; Ağgez, G.; Agramunt, J.; Ahmed, U.; Aktas, O.; Alcayne, V.; Algora, A.; Alhomaidhi, S.; Amjad, F.; Appleton, C.; Armstrong, M.; Balogh, M.; Banerjee, K.; Bednarczyk, P.; Benito, J.; Bhattacharya, C.; Black, P.; Blazhev, A.; Bottoni, S.; Boutachkov, P.; Bracco, A.; Bruce, A.M.; Brunet, M.; Bruno, C.G.; Burrows, I.; Calvino, F.; Canavan, R.L.; Cano-Ott, D.; Chishti, M.M.R.; Coleman-Smith, P.; Cortés, M.L.; Cortes, G.; Crespi, F.; Das, B.; Davinson, T.; De Blas, A.; Dickel, T.; Doncel, M.; Ertoprak, A.; Esmaylzadeh, A.; Fornal, B.; Fraile, L.M.; Galtarossa, F.; Gottardo, A.; Guadilla, V.; Ha, J.; Haettner, E.; Häfner, G.; Heggen, H.; Herrmann, P.; Hornung, C.; Jazrawi, S.; John, P.R.; Jokinen, A.; Jones, C.E.; Kahl, D.; Karayonchev, V.; Kazantseva, E.; Kern, R.; Knafla, L.; Knöbel, R.; Koseoglou, P.; Kosir, G.; Kostyleva, D.; Kurz, N.; Kuzminchuk, N.; Labiche, M.; Lawson, J.; Lazarus, I.; Lenzi, S.M.; Leoni, S.; Llanos-Expósito, M.; Lozeva, R.; Maj, A.; Meena, J.K.; Mendoza, E.; Menegazzo, R.; Mengoni, D.; Mertzimekis, T.J.; Mikolajczuk, M.; Million, B.; Mont-Geli, N.; Morales, A.I.; Morral, P.; Mukha, I.; Murias, J.R.; Nacher, E.; Napiralla, P.; Napoli, D.R.; Nara-Singh, B.S.; O’Donnell, D.; Orrigo, S.E.A.; Page, R.D.; Palit, R.; Pallas, M.; Pellumaj, J.; Pelonis, S.; Pentilla, H.; Pérez de Rada, A.; Pérez-Vidal, R.M.; Petrache, C.M.; Pietralla, N.; Pietri, S.; Pigliapoco, S.; Plaza, J.; Polettini, M.; Porzio, C.; Pucknell, V.F.E.; Recchia, F.; Reiter, P.; Rezynkina, K.; Rinta-Antila, S.; Rocco, E.; Rösch, H.A.; Roy, P.; Rubio, B.; Rudigier, M.; Ruotsalainen, P.; Saha, S.; Şahin, E.; Scheidenberger, Ch.; Seddon, D.A.; Sexton, L.; Sharma, A.; Si, M.; Simpson, J.; Smith, A.; Smith, R.; Söderström, P.A.; Sood, A.; Soylu, A.; Tanaka, Y.K.; Valiente-Dobón, J.J.; Vasileiou, P.; Vasiljevic, J.; Vesic, J.; Villamarin, D.; Weick, H.; Wiebusch, M.; Wiederhold, J.; Wieland, O.; Wollersheim, H.J.; Woods, P.J.; Yaneva, A.; Zanon, I.; Zhang, G.; Zhao, J.; Zidarova, R.; Zimba, G.; Zyriliou, A. in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2022). 1033 166662.

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The DEcay SPECtroscopy (DESPEC) setup for nuclear structure investigations was developed and commissioned at GSI, Germany in preparation for a full campaign of experiments at the FRS and Super-FRS. In this paper, we report on the first employment of the setup in the hybrid configuration with the AIDA implanter coupled to the FATIMA LaBr3(Ce) fast-timing array, and high-purity germanium detectors. Initial results are shown from the first experiments carried out with the setup. An overview of the setup and function is discussed, including technical advancements along the path.