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<b>JEFFERSON LAB COLLOQUIUM<br>
<br>
The Origin(s) of the Heavy Elements</b><br>
<br>
<b>Ani Aprahamian<br>
Frank M Freimann Professor of Physics<br>
University of Notre Dame</b><br>
<br>
ABSTRACT<br>
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.<br>
<br>
Wednesday, March 13, 2013<br>
4 p.m.<br>
CEBAF Center auditorium<br>
Cookies & coffee in the CEBAF Center lobby, 3:30 p.m.<br>
<br>
On the Jefferson Lab At A Glance calendar at:<br>
<a class="moz-txt-link-freetext"
href="https://misportal.jlab.org/ul/calendar/calendar_date.cfm?date=13&month=3&year=2013">https://misportal.jlab.org/ul/calendar/calendar_date.cfm?date=13&month=3&year=2013</a><u><b><br>
</b></u><br>
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