Regular articles

2024

1. Comparison of readout systems for high-rate silicon photomultiplier applications

   Wong, M.L., Kołodziej, M., Briggl, K., Hetzel, R., Korcyl, G., Lalik, R., Malige, A., Magiera, A., Ostrzołek, G., Rusiecka, K., Stahl, A., Urbanevych, V., Wiebusch, M., and Wrońska, A.

   Journal of Instrumentation 2024

   Abs

   Recent years have shown an increased use of silicon photomultipliers (SiPM) in experiments as they are of reasonable cost, have relatively low power consumption and are easily available in a variety of form factors allowing for a large number of readout channels. At the same time, experiments are generating data at increasingly high rates requiring the use of more efficient readout systems. In this work, the dead time, efficiency, dynamic range, coincidence time resolution and energy resolution of five different readout systems at various stages of maturity are evaluated to determine the best system for acquiring data from a detector in a high rate experiment. Additional functionalities of the systems are also discussed.

2. NL-ITI: Optimizing Probing and Intervention for Improvement of ITI Method

   Hoscilowicz, Jakub, Wiacek, Adam, Chojnacki, Jan, Cieslak, Adam, Michon, Leszek, Urbanevych, Vitalii, and Janicki, Artur

   arXiv preprint 2024

2023

1. Near-field coded-mask technique and its potential for proton therapy monitoring

   Hetzel, Ronja, Urbanevych, Vitalii, Bolke, Andreas, Kasper, Jonas, Kercz, Monika, Kołodziej, Magdalena, Magiera, Andrzej, Mueller, Florian, Müller, Sara, Rafecas, Magdalena, Rusiecka, Katarzyna, Schug, David, Schulz, Volkmar, Stahl, Achim, Weissler, Bjoern, Wong, Ming-Liang, and Wrońska, Aleksandra

   Physics in Medicine & Biology 2023

   Abs

   Objective. Prompt-gamma imaging encompasses several approaches to the online monitoring of the beam range or deposited dose distribution in proton therapy. We test one of the imaging techniques - a coded mask approach - both experimentally and via simulations. Approach. Two imaging setups have been investigated experimentally. Each of them comprised a structured tungsten collimator in the form of a modified uniformly redundant array mask and a LYSO:Ce scintillation detector of fine granularity. The setups differed in detector dimensions and operation mode (1D or 2D imaging). A series of measurements with radioactive sources have been conducted, testing the performance of the setups for near-field gamma imaging. Additionally, Monte Carlo simulations of a larger setup of the same type were conducted, investigating its performance with a realistic gamma source distribution occurring during proton therapy. Main results. The images of point-like sources reconstructed from two small-scale prototypes’ data using the maximum-likelihood expectation maximisation algorithm constitute the experimental proof of principle for the near-field coded-mask imaging modality, both in the 1D and the 2D mode. Their precision allowed us to calibrate out certain systematic offsets appearing due to the limited alignment accuracy of setup elements. The simulation of the full-scale setup yielded a mean distal falloff retrieval precision of 0.72 mm in the studies for beam energy range 89.5–107.9 MeV and with 1 × 108 protons (a typical number for distal spots). The implemented algorithm of image reconstruction is relatively fast—a typical procedure needs several seconds. Significance. Coded-mask imaging appears a valid option for proton therapy monitoring. The results of simulations let us conclude that the proposed full-scale setup is competitive with the knife-edge-shaped and the multi-parallel slit cameras investigated by other groups.

2022

1. Pion absorption from the lowest atomic orbital in ^2\mathrmH, ^3\mathrmH, and ^3\mathrmHe

   Golak, J., Urbanevych, V., Skibiński, R., Witała, H., Topolnicki, K., Baru, V., Filin, A. A., Epelbaum, E., Kamada, H., and Nogga, A.

   Phys. Rev. C 2022

2021

1. Application of a momentum-space semi-locally regularized chiral potential to selected disintegration processes

   Urbanevych, V., Skibiński, R., Witała, H., Golak, J., Topolnicki, K., Grassi, A., Epelbaum, E., and Krebs, H.

   Phys. Rev. C 2021
2. A systematic study of LYSO:Ce, LuAG:Ce and GAGG:Ce scintillating fibers properties

   Rusiecka, K., Hetzel, R., Kasper, J., Kozani, M. Kazemi, Kohlhase, N., Kołodziej, M., Lalik, R., Magiera, A., Migdał, W., Rafecas, M., Stahl, A., Urbanevych, V., Wong, M.L., and Wrońska, A.

   Journal of Instrumentation 2021

2020

1. Investigation of the interaction of circularly and linearly polarized photon beams with a polarized ^3\mathrmHe target

   Witała, H., Golak, J., Skibiński, R., Topolnicki, K., and Urbanevych, V.

   Phys. Rev. C 2020
2. Newton’s second law analogy for the traveling wave of nuclear burning

   Urbanevych, Vitalii, Sharph, Igor, Tarasov, Viktor, and Rusov, Vitaliy

   EPJ Nuclear Sciences & Technologies 2020

Conference proceednigs

2024

2023

1. Few-nucleon systems for nuclear physics

   Golak, Jacek, Skibiński, Roman, Witała, Henryk, Ramirez, Diego, Urbanevych, Vitalii, and Chahar, Vaibhav

   Acta Physica Polonica. B, Proceedings Supplement 2023

   Abs

   The chiral effective field theory (EFT) and ab initio few- and many-body methods play a very important role in precision nuclear theory. In this contribution, the current status of the chiral nuclear forces derived by the Low Energy Nuclear Physics International Collaboration (LENPIC) is discussed and the role of three-nucleon continuum calculations within LENPIC is described.

2022

2021

2020

1. An application of chiral forces with the semi-local regularization in momentum space to the deuteron photodisintegration process

   Urbanevych, V., Golak, J., Skibiński, R., and Witała, H.

   Journal of Physics: Conference Series 2020

   Abs

   A recent paper by P. Reinert et al. [Eur. Phys. J. A54, 86 (2018)] showed a possibility of improving chiral nucleon-nucleon potential models by employing a semi-local regularization in momentum space. The authors derived nucleon-nucleon potentials with this kind of regularization completely up to the fifth order of the chiral expansion and considered additionally some contact interactions which appear at the sixth order. Such a chiral interaction has never been applied to study electromagnetic processes in two- or three-nucleon systems. Here we continue our research of photodisintegration processes, now using the improved chiral force. In particular, we discuss our predictions for the deuteron photodisintegration reaction in the photon energy range up to 100 MeV. The results of our calculations reveal that the new potential yields predictions characterized by a weaker dependence on the regularization parameter and faster convergence with respect to the chiral expansion order compared to the older chiral potentials.

2. Investigations of the few-nucleon systems within the LENPIC project

   Golak, Jacek, and others,

   SciPost Phys. Proc. 2020
3. The application of chiral forces to the deuteron photodisintegration process at Eγ= 140 MeV

   Urbanevych, Vitalii, Golak, Jacek, Skibiński, Roman, and Witała, Henryk

   Acta Physica Polonica. B, Proceedings Supplement 2020