Speaker: Michał Palczewski
Title: Present state of knowledge about physical properties of superheavy elements
Abstract: Development of knowledge about existence and properties, both physical and chemical, of superheavy elements (SHN) can be seen in different aspects. Recently (8.11.2016) four last elements gained their names. Also all the time number of produced isotopes of SHN is increasing, allowing to improve our theoretical models. At the same time nuclear physicists attempt to get elements from outside known periodic table (it means heavier than Og – element 118). During the presentation I would like to shortly remind basic information about SHN, say about recently named elements and efforts to get new one and also present recent detailed illustration of accuracy of presently used nuclear-mass models.
Speaker: Katarzyna Frankiewicz
Title: Search for dark matter induced neutrinos with the Super-Kamiokande detector.
Abstract: The indirect search for neutrinos from dark matter annihilation in the Earth core will be presented. In this analysis we use atmospheric neutrino data collected with the Super-Kamiokande (SK) detector in years 1996-2016. Analysis method is based on detailed simulation of signal (neutrinos from dark matter annihilation) and background (atmospheric neutrinos) for the SK detector. Angular distributions and energy spectra as expected for signal and background are taken into account. Various dark matter annihilation channels and wide range of relic particle masses are considered. Based on the global fit of a simulated signal and background to the data, allowed number of dark matter induced neutrinos contained in SK data can be constrained. Obtained limits on dark matter induced neutrino flux are related to limit on spin-independent WIMP-nucleon cross section and compared against results of direct detection experiments.
Venue: Room 22, Tuesday Nov. 8th 2016, 9:00 A.M.
There will be no seminar due to All Saints’ Day.
Speaker: Jakub Sierchuła
Title: “Multi-criterial comparative analysis of the generating units at nuclear and conventional power plants on selected examples”
Abstract: The talk presents a comparative analysis of nuclear power plant with the conventional coal-fired power plants on hard coal and ignite. It focuses on the structure and principle of operation of the abovementioned units, specified their parameters and appointed their main technical and economic indicators. It contains specific description of nuclear units, wherein the nuclear power plant with AP1000 reactor was described, starting with general information, through the characteristics of thermal cycles, structural elements, auxiliary devices and fuel cycle. The next part presents construction and explains the principle of work of supercritical steam units. As an example of these kind of units there are presented two supercritical power plants: Jaworzno III and Belchatow. Both units have been described in detail, including their parameters and devices’ characteristics. Analysis focuses on the thermodynamic, operational, environmental and economic factors.
Venue: Room 22, Tuesday Oct. 25th 2016, 9:00 A.M.