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</o:shapelayout></xml><![endif]--></head><body link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal style='text-align:justify'><a name="_Hlk66790225"></a><a name="_Hlk41995074"><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Vabimo vas na predavanje ob letošnjih Stefanovih dnevih, ki bo <strong><span style='color:red'>25. marca 2021, ob 15. uri. </span></strong></span></span></a><span style='mso-bookmark:_Hlk66790225'><b><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Predavanje bo v spletnem konferenčnem sistemu Zoom in mu lahko prisostvujete tako, da v brskalnik prenesete naslov </span></b></span><a href="https://uni-lj-si.zoom.us/j/98099345188?pwd=c1M0dHdnNHVDVFc2aC90RktCUHJKUT09"><span style='mso-bookmark:_Hlk66790225'><b><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>https://uni-lj-si.zoom.us/j/98099345188?pwd=c1M0dHdnNHVDVFc2aC90RktCUHJKUT09</span></b></span><span style='mso-bookmark:_Hlk66790225'></span></a><span style='mso-bookmark:_Hlk66790225'><b><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>; identifikacijska stevilka sestanka je 980 9934 5188, geslo pa 876849.</span></b></span><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Predavanje lahko spremljate tudi na TV IJS kanalu na spletnem naslovu </span></span><a href="http://tv.ijs.si"><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>tv.ijs.si</span></span><span style='mso-bookmark:_Hlk66790225'></span></a><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>.<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk66790225'><strong><span style='font-size:12.0pt;font-family:"Calibri",sans-serif;font-weight:normal'> </span></strong></span><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Napovednik predavanja najdete na naslovu </span></span><a href="http://www.ijs.si/ijsw/Koledar_prireditev"><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#954F72'>http://www.ijs.si/ijsw/Koledar_prireditev</span></span><span style='mso-bookmark:_Hlk66790225'></span></a><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>, posnetke preteklih predavanj<span style='color:blue'> </span>pa na </span></span><a href="http://videolectures.net/kolokviji_ijs"><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#954F72'>http://videolectures.net/kolokviji_ijs</span></span><span style='mso-bookmark:_Hlk66790225'></span></a><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>.<o:p></o:p></span></span></p><p class=MsoNormal align=center style='text-align:center'><span style='mso-bookmark:_Hlk66790225'><b><span lang=SL style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal align=center style='text-align:center'><span style='mso-bookmark:_Hlk66790225'><b><span lang=SL style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></b></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk66790225'><b><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>prof. dr. Andrej Filipčič in prof. dr. Marko Zavrtanik</span></b></span><span style='mso-bookmark:_Hlk66790225'><b><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p></o:p></span></b></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk66790225'><i><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Institut Jožef Stefan in Univerza v Novi Gorici<o:p></o:p></span></i></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk66790225'><i><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></i></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk66790225'><b><span style='font-size:14.0pt;font-family:"Times New Roman",serif'>Meritve kozmičnih delcev ekstremnih energij na Observatoriju Pierre Auger<o:p></o:p></span></b></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk66790225'><span lang=SL style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></span></p><p class=MsoNormal style='text-align:justify;text-autospace:none'><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Zemljo neprestano bombardirajo kozmični žarki, ki imajo energije od nekaj MeV do preko 10<sup>20</sup> eV. Njihova sestava se spreminja z energijo, v večini primerov pa so to fotoni, protoni ali atomska jedra. Izvor in načini pospeševanja kozmičnih delcev še vedno niso povsem jasni, vsaj ne za najbolj energetske, kjer produkcijski mehanizmi v običajnih astrofizikalnih objektih ne zadostujejo. Observatorij Pierre Auger v Argentini meri pljuske kozmičnih delcev, ki jih ti povzročijo v atmosferi. Talni detektorji Čerenkova pokrivajo površino 3000 km<sup>2</sup>, fluorescenčni detektorji pa merijo svetlobo nad tem območjem, ki jo pljuski oddajajo na poti do tal. Štirje sistemi Lidar merijo propustnost atmosfere za fluorescenčno svetlobo. Od leta 2008 smo z Observatorijem izmerili preko 10.000 kozmičnih delcev z energijami nad 10<sup>19</sup> eV in objavili številne rezultate o njihovih lastnostih, kompoziciji ter energijski spekter. Oster rob spektra okoli 10<sup>20</sup> eV kaže na to, da delci prihajajo izven naše galaksije, njihove vpadne smeri pa niso korelirane s porazdelitivjo zvezd v galaksiji.</span></span><span style='mso-bookmark:_Hlk66790225'><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_Hlk66790225'><span lang=SL style='font-size:12.0pt;font-family:"Times New Roman",serif'> </span></span><span style='mso-bookmark:_Hlk66790225'><span style='font-size:12.0pt;font-family:"Cambria",serif'><o:p></o:p></span></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk66790225'><span lang=ES style='font-size:12.0pt;font-family:"Times New Roman",serif'>Predavanje bo v slovenščini.<o:p></o:p></span></span></p><p class=MsoNormal style='text-align:justify'><span style='mso-bookmark:_Hlk66790225'><span lang=SL style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></span></p><span style='mso-bookmark:_Hlk66790225'></span><p class=MsoNormal style='text-align:justify'><b><span lang=SL style='font-size:12.0pt;font-family:"Times New Roman",serif'>Lepo vabljeni!<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt'><o:p> </o:p></span></p></div></body></html>