[Triumf-seminars] TRIUMF Seminar today at 15:00

[postmaster@admin.triumf.ca]

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Date/Time: Tue 2003-06-03 at 15:00

Location:  Auditorium          

Speaker:   Jac Caggiano (Yale University)

Title:     Indirect measurements for determining the production of 22Na and 26Al in explosive stellar burning sites

Abstract: Cosmic explosions such as novae and supernovae have been studied extensively, yet they remain mysterious. Uncertainties in the hundreds of nuclear reactions and dynamical uncertainties are what cloud our understanding of these events. While it is impossible to build a star in the laboratory, the nuclear reaction data is more easily attainable, but still very difficult. The measurements are lacking because most of the participating nuclear reactions are proton, neutron, or alpha-particle induced reactions on short-lived radioactive nuclei. Recently, gamma ray observatories have provided new data which has helped to understand these explosions better.

Initially, this seminar will focus on many experiments designed to precisely measure the masses of nuclei, and locate "missing" excited states in nuclei that play key roles in the production of cosmic gamma ray emitters 22Na and 26Al in the rp process. Looking to the future, other astrophysical processes, important for understanding the origin of the elements, will be discussed, as well as required but lacking nuclear data (masses and excited states) for determining the astrophysical process paths through the nuclear chart. Finally, the nuclear physics opportunities, especially nuclear astrophysics opportunites, of future accelerators will be discussed.

Stimulants available 15 minutes before the talk.

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Subscription information available at http://admin.triumf.ca/netdata/seminars/list


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