Program - Brookhaven National Laboratory
Program - Brookhaven National Laboratory
Program - Brookhaven National Laboratory
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Session GD Antineutrinos<br />
Tuesday March 5, 2013<br />
Room: Empire West at 1:30 PM<br />
GD 1 1:30 PM<br />
The Detection of Reactor Antineutrinos for Reactor Core Monitoring: an Overview<br />
M. Fallot<br />
SUBATECH, CNRS/IN2P3 - Univ. of Nantes - Ecole des Mines de Nantes, Nantes, FRANCE<br />
The field of applied neutrino physics has shown new developments in the last decade. The International<br />
Atomic Energy Agency (IAEA) has expressed its interest in the potentialities of antineutrino detection<br />
as a new tool for reactor monitoring and has created a dedicated ad-hoc Working Group in late 2010 to<br />
follow the associated Research and Development. Several research projects are on-going over the world<br />
either to build antineutrino detectors dedicated to reactor monitoring, either to search for and develop<br />
innovative detection techniques, or to simulate and study the characteristics of the antineutrino emission<br />
of actual and innovative nuclear reactor designs. The European Safeguards Research and Development<br />
Association, ESARDA [1], has created in late 2010 a group devoted to Novel Approaches and Novel<br />
Technologies (NA/NT) [2] in order to create contacts between the research community and agencies. The<br />
ESARDA NA/NT working group has decided one year ago to create a sub-WG dedicated to the detection of<br />
antineutrinos. At this conference, we propose to give an overview of the relevant properties of antineutrinos,<br />
the possibilities and limitations of their detection and the status of various developments towards compact<br />
antineutrino detectors for reactor monitoring considered in perspective of the antineutrino emission from<br />
various reactor designs. We will then present the ESARDA sub-WG devoted to the antineutrino probe<br />
and its objectives.<br />
[1] European Safeguards Research and Development Association, http://esarda2.jrc.it/about/index.html<br />
[2] ESARDA NA/NT: http://esarda2.jrc.it/internal activities/WG-NT-NA/index.html<br />
GD 2 2:00 PM<br />
Development of a High Precision Beta Spectra Generator Using the Latest Nuclear<br />
Databases<br />
Gregory Keefer, Timothy Classen<br />
Lawrence Livermore <strong>National</strong> <strong>Laboratory</strong><br />
We describe an effort at LLNL, aimed to produce a well-validated and public code base for the nuclear<br />
physics community to model the dN/dE spectra for electron and positron decay from the theory of beta<br />
decay. A detailed generator for producing these spectra is something that is absent from widely used<br />
Monte Carlo codes like Geant4. The ability to precisely model these decays is vital to low background<br />
experimental searches such as dark matter or neutrino-less double beta decay. Furthermore, high precision<br />
beta spectra (HPBeta) have recently been found to be critical input to the composite fission beta<br />
spectrum flux predictions. The last 30 years of reactor antineutrino experiments, and the recent interpretation<br />
of a possible 1 eV sterile neutrino, rely on our ability to precisely model and interpret these<br />
composite fission beta spectra. We present our efforts to extract and apply the relevant parameters from<br />
the JENDL4.0, ENDF-VII and ENSDF nuclear databases to the composite fission beta spectra of 235 U,<br />
238 U, 239 Pu and 241 Pu. The individual beta spectra calculations for each fission product are constructed<br />
and a subset of these are being validated against measured beta data. Additionally we will present an<br />
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