<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.value
{mso-style-name:value;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<div style="mso-element:para-border-div;border:none;border-bottom:solid windowtext 1.5pt;padding:0in 0in 1.0pt 0in">
<p class="MsoNormal" align="center" style="text-align:center;border:none;padding:0in">
<b><span style="font-size:48.0pt">Physics Seminar<o:p></o:p></span></b></p>
</div>
<p class="MsoNormal" align="center" style="text-align:center"><span class="value"><b><span style="font-size:22.0pt">Donald Jones</span></b></span><span class="value"><span style="font-size:22.0pt"><o:p></o:p></span></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span class="value"><b><span style="font-size:22.0pt">Temple University</span></b></span><o:p></o:p></p>
<p class="MsoNormal"><b><i><span style="font-size:12.0pt"><o:p> </o:p></span></i></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><i><span style="font-size:22.0pt">Reactor Antineutrinos and the PROSPECT Experiment<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:22.0pt"><o:p> </o:p></span></i></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt">Abstract:<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt"><o:p> </o:p></span></b></p>
<p class="MsoNormal">After the initial discovery of the neutrino by Cowan and Reines at the Savannah River reactor complex, nuclear reactors have played a key role in developing our understanding of neutrinos and the weak interaction. For several decades they
were thought to be a well understood source of antineutrinos, but in 2011 a new calculation of the neutrino flux led to a 6% deficit in the measured reactor flux relative to the new calculation. This deficit has been termed the Reactor Antineutrino Anomaly
(RAA) with one interpretation of it being that the neutrinos are disappearing via oscillation into a fourth sterile species. Furthermore, several key reactor antineutrino experiments at commercial power reactors have recently measured an excess of events in
the 5 MeV prompt energy region of the antineutrino spectrum relative to the calculated spectrum. The PROSPECT short-baseline reactor experiment is designed to perform a precision measurement of the antineutrino spectrum associated with 235-U (the key source
of fission antineutrinos at LEU commercial reactors) and probe, to high-significance, sterile neutrino oscillation with mass states in the eV region. PROSPECT operates at a distance of 7m from the compact high-flux isotope reactor (HFIR) at ORNL and consists
of a single volume of 6Li-loaded liquid scintillator separated into 154 optically isolated segments. Segmentation provides simple event localization over a range of baselines within the detector and thus supports a reactor-model independent oscillation search
through a relative measurement of energy spectra between segments. This talk will discuss the PROSPECT oscillation and spectrum analyses as well as presenting recent results.<o:p></o:p></p>
<p class="MsoNormal" align="center" style="text-align:center"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><o:p> </o:p></p>
<p class="MsoNormal"><i><o:p> </o:p></i></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt"><o:p> </o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt">Friday, June 7, 2019<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt">11:00am<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><b><span style="font-size:18.0pt">CEBAF Center Auditorium<o:p></o:p></span></b></p>
<p class="MsoNormal" align="center" style="text-align:center"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Stephanie Tysor<o:p></o:p></p>
<p class="MsoNormal">Thomas Jefferson National Accelerator Facility<o:p></o:p></p>
<p class="MsoNormal">Physics Division<o:p></o:p></p>
<p class="MsoNormal">Hall A Administrative Assistant<br>
(office)<a href="callto:757-269-6005"><span style="color:blue">757-269-6005</span></a> (fax)<a href="callto:757-269-5235"><span style="color:blue">757-269-5235</span></a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>