Seminars

Monday, Dec 09 at 12:30 PM
1400 Biomedical and Physical Sciences Building
Luca Izzo, DARK/NBI, University of Copenaghen
Classical novae as lithium factories in the galaxy

Abstract:  The abundance of lithium observed in very young stellar populations is few times larger than the primordial one estimated by recent Planck measurements. Since Lithium is easily destroyed in the stellar interiors, the search for astrophysical sources responsible for the observed lithium over-abundance was a challenge for decades. In this talk I will present the results of an on-going survey dedicated to the study of nova outburst with high-resolution spectrographs at ESO/VLT. In particular, I will concentrate on the recent detection of beryllium-7 in the spectra of recent classical novae. While this finding is a further confirmation of the occurrence of the thermo-nuclear runaway in nova explosions, at same time it implies that classical novae are one of the main factories of lithium in our Galaxy (and other nearby systems).

Thursday, Dec 12 at 1:00 PM
1200 FRIB Laboratory
Benjamin Loseth, NSCL Graduate Assistant
Development of a single-atom microscope for optical detection of atomic nuclear reaction products

Abstract:  Committee: Jaideep Singh(Chairperson), Luke Roberts, Hendrik Schatz, Stuart Tessmer, Kirsten Tollefson. Thesis is on display in 1312 BPS bldg. and the NSCL atrium.

Saturday, Dec 14 at 10:30 AM
1300 FRIB Laboratory
Georgios Perdikakis,
Life under blazing stars: supernova mysteries

Abstract:  The atoms that make up the world we live in have affected human life for thousands of years. All of the prosperity, peace, culture, power, and progress we experience is based on the availability of the planet's natural resources. We value the rarest of elements we can find on Earth. We use them in technology, art, and jewelry. We need these elements to sustain our living bodies. As resources run out, we turn to quests for new habitable worlds to mine. Yet, meaningful pieces of information about the origin of elements in the universe are lost to us. Scientists have turned to the stars and to the atomic nucleus to understand supernovae and other spectacular explosions. To uncover how the fateful pattern of element compositions came to be in our corner of the universe (or elsewhere), we will need to understand thousands of nuclear reactions in stars and predict their outcome. Most of these reactions with the mysterious isotopes that live and die inside blazing stars have not been observed yet. But with a facility in East Lansing that will make supernova isotopes into beams, it's only a matter of time before new discoveries will be made.