[On_site_list] JLab Colloquium: March 13: The Origins of the Heavy Elements

[deborah magaldi]

*JEFFERSON LAB COLLOQUIUM

The Origin(s) of the Heavy Elements*

*Ani Aprahamian
Frank M Freimann Professor of Physics
University of Notre Dame*

ABSTRACT
The rapid neutron capture process (r-process) is thought to be 
responsible for the creation of more than half of all elements beyond 
iron.  Yet, the site for the r-process was labeled as one of eleven 
greatest unanswered questions in physics. The scientific challenges to 
understanding the origin of the heavy elements beyond iron lie in both 
the uncertainties associated with astrophysical conditions that are 
needed to allow an r-process to occur and a vast lack of knowledge about 
the properties of nuclei far from stability. There is great global 
competition to access and measure the most exotic nuclei that existing 
facilities can reach, while simultaneously building new, more powerful 
accelerators to make even more exotic nuclei. This talk will discuss 
work to determine the most crucial nuclei to measure using an r-process 
simulation code based on sensitivities to various basic nuclear 
properties such as nuclear masses, beta decay rates, neutron capture 
cross-sections, and beta-delayed neutron emissions. The results have 
been used and will be used to determine the experimental programs of 
radioactive ion beam facilities worldwide.

Wednesday, March 13, 2013
4 p.m.
CEBAF Center auditorium
Cookies & coffee in the CEBAF Center lobby, 3:30 p.m.

On the Jefferson Lab At A Glance calendar at:
https://misportal.jlab.org/ul/calendar/calendar_date.cfm?date=13&month=3&year=2013_*
*_
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