Konstantinos Topalis
Research Subjects
Research Interests
Konstantinos Topalis has a total of 40 co-authors. Here are the top co-authors by number of shared publications:
A. Turturica
2 shared publications- Dennis Bonatsos
Institute of Nuclear and Particle Physics, National Centre for Scientific Research “Demokritos”, GR-15310 Aghia Paraskevi, Attiki, Greece
2 shared publications - Pavlos Koseoglou
Technische Universität Darmstadt
2 shared publications - Polytimos Vasileiou
Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Strada Reactorului 30, POB MG6, RO-077125 Bucharest-Mǎgurele, Romania
2 shared publications - Theodoros John Mertzimekis
Department of Physics, National and Kapodistrian University of Athens, Zografou Campus, GR-15784 Athens, Greece
2 shared publications A. Martinou
1 shared publication
Latest Publications
- Open Access
- 24 February 2026
- Published by National Documentation Centre (EKT) in HNPS Advances in Nuclear Physics
- Vol. 32, 113-118
Gamma ray spectroscopic analysis around the N=104 mid-shell for 176,177Yb and 182W nuclei
Even-even Yb and W isotopes around the N=104 mid-shell region are known to present deformation. The ground-band states of these nuclei are well described by the SU(3) symmetry, indicating a rigid-rotor character. Excited states of even-even isotopes in the region, namely 176Yb and 182W, were populated through Coulomb excitation and fusion-evaporation reactions, in an experiment performed at IFIN-HH in Măgurele, Romania. The gamma-spectroscopy of these nuclei will be presented in this contribution. Additionally, gamma spectroscopy results for the even-odd 177Yb nucleus, populated by the 1n-transfer reaction mechanism, will be presented. Contradictory to the collective description of the ground-band excitations in 176Yb and 182W isotopes, the excited states of this nucleus can be described by single-particle excitations. The gamma-spectroscopy analysis of this data contributes to the evaluation of the available data in this mass region, while ongoing work is expected to provide further insights for the nuclear structure of these rare-earth isotopes.
- 24 February 2026
- Published by National Documentation Centre (EKT) in HNPS Advances in Nuclear Physics
- Vol. 32, 113-118
Open AccessGamma ray spectroscopic analysis around the N=104 mid-shell for 176,177Yb and 182W nuclei
Even-even Yb and W isotopes around the N=104 mid-shell region are known to present deformation. The ground-band states of these nuclei are well described by the SU(3) symmetry, indicating a rigid-rotor character. Excited states of even-even isotopes in the region, namely 176Yb and 182W, were populated through Coulomb excitation and fusion-evaporation reactions, in an experiment performed at IFIN-HH in Măgurele, Romania. The gamma-spectroscopy of these nuclei will be presented in this contribution. Additionally, gamma spectroscopy results for the even-odd 177Yb nucleus, populated by the 1n-transfer reaction mechanism, will be presented. Contradictory to the collective description of the ground-band excitations in 176Yb and 182W isotopes, the excited states of this nucleus can be described by single-particle excitations. The gamma-spectroscopy analysis of this data contributes to the evaluation of the available data in this mass region, while ongoing work is expected to provide further insights for the nuclear structure of these rare-earth isotopes.
- Open Access
- 24 February 2026
- Published by National Documentation Centre (EKT) in HNPS Advances in Nuclear Physics
- Vol. 32, 73-78
Investigating the nuclear structure of 116,118Te
The 116,118Te isotopes, similar to the Cd mid-shell isotopes which are their mirror partners across the 𝑍 =50 shell, show vibrational features on their ground-band states. However, recent density functional theory calculations and proxy-SU(3) studies also predict shape coexistence in these nuclei. More experimental data are needed in order to verify this. An experiment was conducted at the 9MV Tandem Accelerator at IFIN-HH in Magurele, Romania, in order to populate excited states in 116,118Te by the fusion evaporation reaction mechanism. An 11B beam at beam energy of 35 MeV was impinged on a 107,109Ag target. The subsequent gamma decay was detected using the RoSPHERE array, equipped with 15 HPGe and 10 LaBr3(Ce) detectors. The experiment provided data for spectroscopic analysis and highlighted the need for further refinement in experimental techniques, potentially incorporating the plunger technique to measure the ground-state band lifetimes in the future. In this contribution the gamma-spectroscopy analysis on 116,118Te will be presented. Consecutive work will focus on fast-timing measurements to determine the lifetimes of excited states.
- 24 February 2026
- Published by National Documentation Centre (EKT) in HNPS Advances in Nuclear Physics
- Vol. 32, 73-78
Open AccessInvestigating the nuclear structure of 116,118Te
The 116,118Te isotopes, similar to the Cd mid-shell isotopes which are their mirror partners across the 𝑍 =50 shell, show vibrational features on their ground-band states. However, recent density functional theory calculations and proxy-SU(3) studies also predict shape coexistence in these nuclei. More experimental data are needed in order to verify this. An experiment was conducted at the 9MV Tandem Accelerator at IFIN-HH in Magurele, Romania, in order to populate excited states in 116,118Te by the fusion evaporation reaction mechanism. An 11B beam at beam energy of 35 MeV was impinged on a 107,109Ag target. The subsequent gamma decay was detected using the RoSPHERE array, equipped with 15 HPGe and 10 LaBr3(Ce) detectors. The experiment provided data for spectroscopic analysis and highlighted the need for further refinement in experimental techniques, potentially incorporating the plunger technique to measure the ground-state band lifetimes in the future. In this contribution the gamma-spectroscopy analysis on 116,118Te will be presented. Consecutive work will focus on fast-timing measurements to determine the lifetimes of excited states.