Proposals for the topics of the lectures should be submitted to seminarium@ifj.edu.pl.
28 March 2023, 11:00
online via ZOOM
"Transient Absorption of Warm Dense Matter Created by an X-Ray Free-Electron Laser"
prof. Beata Ziaja-Motyka
23 March 2023, 14:00, sala seminaryjna (pokój 4402, IV p.)
via web page
"Fractal correlation patterns of cognitive processing in working memory tasks"
dr hab. Paweł Oświęcimka (NZ43)
Abstract:
False memories are a topic that has enjoyed decades of fascinating research. With the advance of experimental techniques, insight into cognitive processes of short-term memory distortions has become possible. In our study, we applied fractal analysis to investigate fMRI data representing a diurnal variation of working memory in four types of experimental tasks: two visual-verbal and two non-verbal. We show that the degree of fractal scaling is regionally dependent on engagement in cognitive tasks. Moreover, the obtained characteristics of the signals depend not only on the type of experimental tasks but also on the stage of the experiment, i.e. memorising the stimuli or information retrieval. We conclude that regionally dependent cognitive task engagement can be distinguished based on the fractal characteristics of BOLD signals.
29 March 2023, 11:00, Aula IFJ PAN
"Electronic damage of matter induced by X-rays through post-ionization mechanisms"
dr Wojciech Błachucki (NZ53)
24 March 2023, 12:00, Room 3109
"Systematic analysis of entrance channel influence on the quasi-projectile remnant"
dr Sahil Upadhyaya
Abstract:
Heavy-ion collisions at intermediate energy range (10-100 MeV/A) have been studied since a long time. These studies are used to put constraints on the symmetry energy term (Esym) of the nuclear equation-of-state (EoS). The Esym can be investigated by studying the isospin (N/Z) transport in these nuclear reactions. The FAZIA (Four-π A and Z Identification Array) collaboration aimed at improving the charged particle identification techniques such as pulse-shape analysis (PSA) and ∆E−E method. After many years of R & D, the FAZIA detector is now capable of a full Z identification and A identification up to Z ∼ 25. With this excellent isotopic resolution capability, it is possible to study the N/Z of the reaction products from nuclear reactions at intermediate energies. This research work is focused on the analysis of the data from a recent FAZIA experiment performed at LNS-INFN, Italy in February 2018. A neutron rich projectile (48Ca) was bombarded on 3 different targets (12C, 27Al and 40Ca) at 25 and 40 MeV/A. The dependence of the target mass and beam energy on various reaction observables such as charge (Z), mass (A), multiplicity of charged particles (Mtot), longitudinal (parallel) velocity (v||) and fragment isospin (N/Z) was studied.
Furthermore, a detailed comparison of experimental data with the HIPSE model simulations was also done in order to study HIPSE's performance with respect to intermediate energy nuclear reactions. Additionally, results of an exclusive data analysis by introducing cuts in the experimental data using HIPSE simulations will also be discussed.
24 March 2023, 10:15, AGH WFiIS pok. 104 D11
"Studies of pion-induced reactions with HADES"
Izabela Ciepał