The Heavy Ion Laboratory participated in the first day of the 6th Polish‑British Science Forum, which this year was hosted by the University of Warsaw.

The Director of HIL, Paweł Napiorkowski, presented to the guests from the United Kingdom the accelerator facility operating at the University of Warsaw and its importance for the European Research Area. Particular attention was given to the Laboratory’s extensive international cooperation in nuclear physics research and applications, as well as the use of the Warsaw Cyclotron for training students and young researchers from Poland and abroad.

A brief visit of the Forum participants to the Laboratory allowed them not only to see the research infrastructure available at HIL, but also to meet the international research team led by Dr. Desislava Kalaydjieva from Canada and Dr. Marco Siciliano from the United States. The researchers were conducting measurements using the beam of the Warsaw Cyclotron at the time.

The Deputy Directors of HIL, Dr. Jarosław Choiński and Dr. hab. Krzysztof Kilian, presented the history and characteristics of the cyclotrons operating on the University of Warsaw’s Ochota Campus. Afterwards, the guests from the United Kingdom watched a short film showing the production of FDG — a radiopharmaceutical used in medical diagnostics — manufactured using one of the accelerators installed at the Heavy Ion Laboratory.

More information is available on the websites of the University of Warsaw and the Centre for Europe at UW.

An article devoted to shape coexistence in ¹¹⁰Cd has been published in Physics Letters B.

K. Wrzosek-Lipska, I.Z. Piętka, L. Próchniak, P.E. Garrett, M. Zielińska, T. Abraham, J.M. Allmond, F.L. Bello Garrote, H. Bidaman, V. Bildstein, S. Buck, C. Burbadge, M. Chiari, R. Coleman, G. Colombi, G. Colucci, A. Diaz Varela, D.T. Doherty, S. Dutt, B. Greaves, K. Hadyńska-Klęk, J. Heery, M. Hlebowicz, D. Hymers, J. Iwanicki, G. Jaworski, B. Jigmeddorj, D. Kalaydjieva, M. Kisieliński, M. Komorowska, N. Kopeć, M. Kowalczyk, J. Kowalska, K. Krutul-Bitowska, R. Kumar, A. Mai Quynh, N. Marchini, T. Marchlewski, K.R. Mashtakov, M. Matejska-Minda, C. Michelagnoli, A. Nannini, P.J. Napiorkowski, B. Olaizola, F. Oleszczuk, M. Palacz, E. Pasquali, E.E. Peters, M. Rocchini, E. Sahin, J. Samorajczyk-Pyśk, M. Saxena, A. Stolarz, J. Srebrny, A. Tucholski, A. Trzcińska, M. Venhart, J.L. Wood, S.W. Yates, T. Zidar

Deformation of the 0⁺_1,2 states in ¹¹⁰Cd from low-energy Coulomb excitation,
Physics Letters B, Volume 875, 2026, 140315, ISSN 0370-2693,
https://doi.org/10.1016/j.physletb.2026.140315.

We are pleased to invite you to the upcoming HIL seminar, which will take place on Wednesday, March 25, 2026, at 12:15 (CET) in the library.

Dr. Bahadır Saygı from Ankara University will give a lecture:

“A Photopeak-Bayesian Isotope Identifier for Radiation Portal Monitors
Using a Medium-Resolution CeBr₃ Detector”

Abstract:
Radioisotope Identification Devices (RID) play an essential role in
applied nuclear physics, particularly in nuclear security and safeguards,
where the rapid and reliable characterization of radioactive materials is
crucial. In real-world field conditions, however, identifying
radionuclides in real time—without relying on expert spectral
interpretation—remains challenging. Peak overlap, counting statistics, and
complex background structures often complicate the analysis of gamma-ray
spectra.
In this talk, I will describe the development and experimental validation
of an automated real-time isotope identification algorithm designed to
address these challenges. The approach combines second-derivative-based
peak enhancement with a Bayesian, photopeak-centered decision framework.
Peak detection is carried out using a Mariscotti-type method, allowing
statistically significant gamma-ray photopeaks to be identified in a
robust manner. Isotope attribution is then performed through posterior
probability estimation within a Bayesian inference scheme, taking into
account characteristic gamma emission energies and detector response
effects.
The algorithm has been tested using gamma-ray spectra measured with a
medium energy-resolution scintillation detector. The validation dataset
includes point sources as well as more complex spectra obtained from low
enriched uranium certified reference materials and naturally occurring
uranium–thorium ore samples, representing realistic mixed radiation
fields.
The results show that combining derivative-based peak detection with
Bayesian photopeak classification offers a reliable and computationally
efficient strategy for real-time radionuclide identification. This
framework demonstrates strong potential for implementation in
next-generation, field-deployable gamma spectrometry systems operating
under complex and heterogeneous radiation conditions.

This work has been partially supported by the TUBİTAK 1005 Project
(Project Code: 124F446), titled “Development of an Isotope Identifier
Device (RID) Using a Photopeak-Based Bayesian Statistics Method with
a Medium Energy Resolution CeBr3 Scintillation Detector Integrated
into a Radiation Portal Monitor (RPM).“