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Gamma-spectrometry on the well-deformed 178Yb: excitation functions

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Published: Feb 24, 2026
DOI: https://doi.org/10.12681/hnpsanp.9053
Keywords:
gamma ray - spectroscopy 2n-transfer reaction fusion-evaporation reaction 178Yb 190Pt
Pavlos Koseoglou
Department of Physics, National and Kapodistrian University of Athens, Zografou Campus, GR-15784 Athens, Greece
https://orcid.org/0000-0003-4520-4448
T. J. Mertzimekis
Department of Physics, National and Kapodistrian University of Athens, Zografou Campus, GR-15784 Athens, Greece
https://orcid.org/0000-0001-9191-7903
M. Efstathiou
Department of Physics, National and Kapodistrian University of Athens, Zografou Campus, GR-15784 Athens, Greece
https://orcid.org/0009-0006-1292-4974
P. Vasileiou
Department of Physics, National and Kapodistrian University of Athens, Zografou Campus, GR-15784 Athens, Greece
https://orcid.org/0000-0003-1446-8619
H. Mayr
Institute for Nuclear Physics, Technische Universität Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
https://orcid.org/0000-0001-7368-5176
C. M. Nickel
Institute for Nuclear Physics, Technische Universität Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
https://orcid.org/0009-0004-9381-2776
N. Pietralla
Institute for Nuclear Physics, Technische Universität Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
https://orcid.org/0000-0002-4797-3032
V. Werner
Institute for Nuclear Physics, Technische Universität Darmstadt, Schlossgartenstr. 9, 64289 Darmstadt, Germany
https://orcid.org/0000-0003-4001-0150
A. Blazhev
Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
https://orcid.org/0000-0003-1776-8510
A. Esmaylzadeh
Institut für Kernphysik, UnivInstitut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germanyersität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
https://orcid.org/0000-0003-0408-3774
J. Fischer
Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
https://orcid.org/0000-0002-3918-0999
C. Fransen
Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
J. Jolie
Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
https://orcid.org/0000-0003-4617-3786
M. Ley
Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
https://orcid.org/0000-0003-1453-070X
A. Pfeil
Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
https://orcid.org/0009-0001-7714-0330
F. von Spee
Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
K. Gladnishki
Faculty of Physics, St. Kliment Ohridski University of Sofia, 1164 Sofia, Bulgaria
https://orcid.org/0000-0001-8334-0059
D. Kocheva
Faculty of Physics, St. Kliment Ohridski University of Sofia, 1164 Sofia, Bulgaria
https://orcid.org/0000-0002-9068-4826
G. Rainovski
Faculty of Physics, St. Kliment Ohridski University of Sofia, 1164 Sofia, Bulgaria
https://orcid.org/0000-0002-1729-0249
N. Florea
Horia Hulubei National Institute of Physics and Nuclear Engineering - IFIN-HH, R-077125 Bucharest, Romania
https://orcid.org/0000-0002-5253-099X
A. Radu
Horia Hulubei National Institute of Physics and Nuclear Engineering - IFIN-HH, R-077125 Bucharest, Romania
D. Tofan
Horia Hulubei National Institute of Physics and Nuclear Engineering - IFIN-HH, R-077125 Bucharest, Romania
Dennis Bonatsos
Institute of Nuclear and Particle Physics, NCSR Demokritos, GR-15310 Agia Paraskevi, Greece
https://orcid.org/0000-0003-1728-0910
K. E. Karakatsanis
Institute of Nuclear and Particle Physics, NCSR Demokritos, GR-15310 Agia Paraskevi, Greece
https://orcid.org/0000-0003-1989-3657
Abstract

The Yb isotopes near the N=104 mid-shell region show a transition from spherical to well-deformed, rigid-rotor-like, structures. The 178Yb isotope (the most neutron-rich Yb isotope with measured excited states) shows signs of high deformation. A γ-spectroscopy experiment was conducted in the 10 MV FN Tandem accelerator of the Institut für Kernphysik at the University of Cologne to study 178Yb and the deformation evolution in the isotopic chain. The 176Yb(18O,16O)178Yb 2-neutron-transfer reaction was used to populate excited states in the isotope of interest. In this proceedings contribution the study of the excitation function of this 2-neutron-transfer reaction, which was measured across a range of beam energies, both below and above the Coulomb barrier, will be presented. Additionally, the study of the 176Yb(18O,4n)190Pt fusion-evaporation reaction occurring will also be discussed.

Article Details
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Author Biography
Pavlos Koseoglou, Department of Physics, National and Kapodistrian University of Athens, Zografou Campus, GR-15784 Athens, Greece

nuclear structure, γ-spectroscopy, fast-timing lifetime measurements, in-beam measurements, decay spectroscopy, neutron activation analysis

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