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BEGIN:VEVENT
SUMMARY:Rana Ezzeddine (University of Florida)
DTSTART:20200508T180000Z
DTEND:20200508T190000Z
DTSTAMP:20260422T212728Z
UID:IReNA/1
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/IReNA/1/">In
 sights into the lives (and deaths) of the first stars from observations of
  metal-poor stars</a>\nby Rana Ezzeddine (University of Florida) as part o
 f IReNA online seminar\n\n\nAbstract\nThe oldest\, most metal-poor stars f
 ound in the Galactic halo and satellite dwarf galaxies retain in their atm
 ospheres the chemical footprints of the high redshift Universe. Employing 
 “stellar archaeology” – the diverse use of the chemical and dynamica
 l properties of metal-poor stars – outstanding questions about the early
  Universe can be answered. Using high resolution optical and UV spectrosco
 pic observations of the dataset of the most chemically interesting metal-p
 oor stars\, I aim to probe the nature of the first stars and supernovae ex
 plosions (SNe)\, the relevant nucleosynthesis processes responsible for th
 e formation and evolution of the elements as well as early star and galaxy
  formation processes. I will discuss how we I’ve used the most metal-poo
 r Galactic stars to help elucidate the nature of their first star progenit
 ors and mechanisms of the SNe responsible for their chemical signatures. I
  will highlight how these metal-deficient stars could be used to place con
 straints on modelling of non-equilibrium steady-state systems\, as applied
  to studies of stellar and planetary atmospheres. Additionally\, I will to
 uch on recent advancements in our understanding of the heaviest elements f
 ormation in metal-poor stars via the r(apid) neutron capture r-process\, e
 specially in light of the ground-breaking gravitational wave discovery of 
 the binary neutron star mergers event GW170817.\n
LOCATION:https://researchseminars.org/talk/IReNA/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Donna Dean (American Chemical Society)
DTSTART:20200522T180000Z
DTEND:20200522T190000Z
DTSTAMP:20260422T212728Z
UID:IReNA/2
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/IReNA/2/">De
 veloping strong mentoring relationships (part 1 of series)</a>\nby Donna D
 ean (American Chemical Society) as part of IReNA online seminar\n\nAbstrac
 t: TBA\n
LOCATION:https://researchseminars.org/talk/IReNA/2/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sabrina Schäfer (Darmstadt)
DTSTART:20200710T180000Z
DTEND:20200710T190000Z
DTSTAMP:20260422T212728Z
UID:IReNA/4
DESCRIPTION:by Sabrina Schäfer (Darmstadt) as part of IReNA online semina
 r\n\nAbstract: TBA\n
LOCATION:https://researchseminars.org/talk/IReNA/4/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Donna Dean (American Chemical Society)
DTSTART:20200529T180000Z
DTEND:20200529T190000Z
DTSTAMP:20260422T212728Z
UID:IReNA/5
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/IReNA/5/">De
 veloping strong mentoring relationships (part 2 of series)</a>\nby Donna D
 ean (American Chemical Society) as part of IReNA online seminar\n\nAbstrac
 t: TBA\n
LOCATION:https://researchseminars.org/talk/IReNA/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Kathrin Göbel (Goethe University Frankfurt)
DTSTART:20200605T180000Z
DTEND:20200605T190000Z
DTSTAMP:20260422T212728Z
UID:IReNA/6
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/IReNA/6/">Co
 ulomb dissociation of 16O into 4He and 12C</a>\nby Kathrin Göbel (Goethe 
 University Frankfurt) as part of IReNA online seminar\n\n\nAbstract\nThe f
 usion reaction of carbon and helium to oxygen is the key to understanding 
 the evolution of stars and the relative abundances of both elements. The r
 eaction rate of 12C(a\,g)16O has to be known with an uncertainty of lower 
 than 10% at a center-of-mass energy of 300 keV during Helium burning condi
 tions. So far\, experiments have studied the reaction down to about 1 MeV.
 \n\nWe measured the Coulomb dissociation of 16O into 4He and 12C at the R3
 B setup in a first campaign within FAIR Phase-0 at GSI Helmholtzzentrum f
 ur Schwerionenforschung\, Darmstadt. The goal was to improve the accuracy 
 of the experimental data and to reach lower center-of-mass energies.\n\nTh
 e experiment required beam intensities of one billion 16O ions per second 
 at an energy of 500 MeV/nucleon. The rare case of Coulomb breakup into 12C
  and 4He posed another challenge: we had to detect particles with the same
  magnetic rigidity as the primary beam\, which are not separated by the su
 per-conducting magnet GLAD. Radical changes of the R3B setup were necessar
 y: All detectors had slits to allow the passage of the unreacted 16O ions\
 , while 4He and 12C would hit the detectors' active areas. We developed an
 d built detectors based on organic scintillators to track and identify the
  reaction products with sufficient precision.\n\nThe talk reviews the setu
 p and the beamtime\, and gives the current status of analysis.\n
LOCATION:https://researchseminars.org/talk/IReNA/6/
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