Seminarium Fizyki Jądra Atomowego
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2014-11-20 (Czwartek)
Zapraszamy do sali 1.01, ul. Pasteura 5 o godzinie 10:15 
dr Tomohiro Oishi (Helsinki Institute of Physics and University of Jyväskylä, Finland)Role of Pairing Correlation in Two-Proton Emission
The pairing correlation between two nucleons plays an essential role in nuclear physics. Recently, the two-proton decay and emission have attracted much interest relevantly to the nuclear pairing correlation. Through these processes, a pair of protons is emitted sequentially or simultaneously from the parent nucleus. The emitted two protons are expected to provide information about the nuclear pairing correlation. In this seminar, we investigate a role of the pairing correlation in two-proton emitting processes. Obviously, an unified framework which treats both the quantum meta-stability and the many-body property is necessary. For this purpose we develop a time-dependent three-body model in which the two-proton emission is described as a time-evolution of the three-body meta-stable state. With this method, the dynamics of the two-proton emission can be intuitively discussed by monitoring the time-dependent two-particle density distribution. Applying this model to the 6Be nucleus, which is the lightest two-proton emitter, and employing a model Hamiltonian which well reproduces the empirical two-proton decay width, we will see that a strongly correlated diproton emission is dominant in the early stage of this process. We will also discuss several novel properties of the pairing correlation in the two-proton emission.
Po seminarium zapraszamy wszystkich na herbatę i ciastka do pokoju 2.63 na II piętrze.
Po seminarium zapraszamy wszystkich na herbatę i ciastka do pokoju 2.63 na II piętrze.
2014-11-13 (Czwartek)
Zapraszamy do sali 1.01, ul. Pasteura 5 o godzinie 10:15
dr Witold Przygoda (Instytut Fizyki, Uniwersytet Jagielloński)Production and Dalitz decays of baryon resonances in p+p interactions at 1.25 and 3.5 GeV beam energy with HADES
HADES is a versatile magnetic spectrometer installed at GSI Darmstadt at SIS18. Thanks to its high acceptance, powerful particle identification and very good mass resolution it allows to study both hadron and dilepton production in πp, πA, pp, pA and AA collisions at a few AGeV beam energy range. In pp collisions at 1.25 GeV, the intermediate (1232) resonance is expected to play a dominant role in the pion production. The resonance cross section was determined from exclusive ppπ° and pnπ+ channels in the framework of a OPE model. In e+e- production, two major sources, π° and (1232), are expected to play dominant role. In particular, for the first time (1232) has been reconstructed exclusively via the pe+e- decay channel and the branching ratio of electromagnetic Dalitz decay has been extracted. At higher kinetic energy (3.5 GeV) dielectron pair production is determined by Dalitz decays of neutral mesons and baryonic resonances and, in the high mass region, by two body decays of ω and ρ. At this beam energy the dilepton invariant mass distribution appears to be sensitive to the structure of the baryon resonance electromagnetic transition form-factors in the time like-region. In the presentation the data are compared to various theoretical predictions
Po seminarium zapraszamy wszystkich na herbatkę i ciastka do pokoju 2.63, w tym samym budynku na II piętrze.
Po seminarium zapraszamy wszystkich na herbatkę i ciastka do pokoju 2.63, w tym samym budynku na II piętrze.
2014-11-06 (Czwartek)
Zapraszamy do sali 1.01, ul. Pasteura 5 o godzinie 10:15
dr Micha Pomorski (CEA SACLAY)CVD diamond a novel ‘miraculous’ material for sensors fabrication? - Diamond activities at LCD CEA-LIST*
Diamond (from ancient Greek ADAMAS = unbreakable or indestructible, also untamable) known from centauries as a gemstone (often associated with many different beliefs) since XIX employed in cutting, polishing and drilling industry but barely used in science. For a long time being ‘untamable’ in terms of impurities, in the early 2000s advances in Chemical Vapor Deposition (CVD) technique allowed growth of ‘a novel diamond’ - almost defect free material. The CVD diamond - a large band-gap semiconductor - becomes today a commercial available material widely used for fabrication of sensors and electronic devices with outstanding properties.Since 1994, initiated by the needs of the nuclear industry and physics, Diamond Sensors Laboratory of CEA-LIST (former Detectors’ Technology Laboratory) develops radiation detection devices with diamond. The laboratory has greatly diversified in the early 2000s and has acquired new areas of expertise including security, industry, chemistry and biology. Nowadays, the laboratory is based on a highly multidisciplinary team of about 20 researchers - physicists, materials and surfaces scientist, sensors experts, chemists, electrochemists, biologists and engineers.A brief introduction to the major research activities of the laboratory will be presented, including: Micro Electro-Mechanical Systems (MEMS), diamond nanoparticles for biomedical applications, Surface Acoustic Wave (SAW) chemical sensors, and boron-doped diamond electrodes for biomedical implants and electrochemistry. Particular attention will be given to the diamond radiation sensors including: ultra-thin membranes for particles detection, 3D detectors for High Energy Physics (HEP) and X-ray beam monitors for modern light sources.
*Laboratoire Capteurs Diamant (LCD), Commissariat à l’Energie Atomique et eux Energies Alternatives (CEA), Laboratoire d’Integration de Systemes et des Technologies (LIST)
Po seminarium zapraszamy wszystkich na herbatkę i ciastka do pokoju 2.63, w tym samym budynku na II piętrze.
*Laboratoire Capteurs Diamant (LCD), Commissariat à l’Energie Atomique et eux Energies Alternatives (CEA), Laboratoire d’Integration de Systemes et des Technologies (LIST)
Po seminarium zapraszamy wszystkich na herbatkę i ciastka do pokoju 2.63, w tym samym budynku na II piętrze.
2014-10-30 (Czwartek)
Zapraszamy do sali 1.01, ul. Pasteura 5 o godzinie 10:15
dr Krzysztof Kilian (ŚLCJ UW)Synteza i badanie właściwości radiofarmaceutyków do Pozytonowej Tomografii Emisyjnej
Technika PET (Tomografia Pozytonowa, Tomografia Emisji Pozytonu) jest nową i dynamicznie rozwijającą się metodą obrazowania metabolicznych zmian narządów i tkanek, która wykorzystuje radioizotopy ß+ promieniotwórcze do znakowania związków biologicznie czynnych, a następnie śledzenie ich dystrybucji w organizmie pacjenta. W Ośrodku Produkcji i Badania Radiofarmaceutyków Uniwersytetu Warszawskiego źródłem izotopów ß+ promieniotwórczych jest cyklotron protonowo-deuteronowy GE PETtrace 8. Laboratoria radiochemiczne pozwalają na otrzymywanie radiofarmaceutyków znakowanych 18F, 11C i 15O. Przedstawione zostaną wyniki badań nad syntezą i kontrolą jakości radiofarmaceutyków do PET, aktualnie realizowane projekty badawcze oraz możliwości współpracy w obszarze nauki i kształcenia wysokokwalifikowanej kadry.
Po seminarium zapraszamy wszystkich na herbatkę i ciastka do pokoju 2.63, w tym samym budynku na II piętrze.
Po seminarium zapraszamy wszystkich na herbatkę i ciastka do pokoju 2.63, w tym samym budynku na II piętrze.
2014-10-16 (Czwartek)
Zapraszamy do sali 1.01, ul. Pasteura 5 o godzinie 10:15
prof. dr hab. Wojciech Broniowski (UJK Kielce i IFJ PAN)Throwing triangles against the wall: ultrarelativistic heavy-ion collisions and shape of light nuclei
2014-10-09 (Czwartek)
Zapraszamy do sali 1.01, ul. Pasteura 5 o godzinie 10:15
prof. dr hab. Marek Demiański (IFT UW)Miraże ciemnej materii
Omówienie ostatnich wyników pomiarowych AMS (Alpha Magnetic Spectrometer) i innych.
Po seminarium zapraszamy wszystkich na herbatkę i ciastka do pokoju 2.63, w tym samym budynku na II piętrze.
Po seminarium zapraszamy wszystkich na herbatkę i ciastka do pokoju 2.63, w tym samym budynku na II piętrze.
2014-10-02 (Czwartek)
Zapraszamy do sali 1.012, ul. Pasteura 5 o godzinie 10:15
prof. dr hab. Wojciech Satuła (IFT UW)The isospin- and angular-momentum-projected density functional theory and beyond: formalism and applications
Po seminarium zapraszamy wszystkich na herbatkę i ciastka do pokoju 2.63, w tym samym budynku na II piętrze.
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