introduction to the triangle universities nuclear laboratory john kelley ncsu and tunl overview of...
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Introduction to the Triangle Universities Nuclear Laboratory
John Kelley NCSU and TUNL
Overview of TUNL Physics Program
Emphasis on neutron induced partial cross section measurements
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Laboratory
• Tandem Accelerator Laboratory • High Intensity -ray Source (HIGS)• Lab for Experimental Nuclear Astrophysics• Low background Radiation Counting Area
• Offsite projects: Los Alamos, Oak Ridge, KamLAND, JLab, Argonne Nat’l Lab, etc…
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Physicists at TUNL (highlights)
• Nuclear Astrophysics
• Weak Interactions studies
• Fundamental Quantity Measurements
• Nucleon Structure
• Few-nucleon Interactions
• Nuclear Spectroscopy
• Nuclear Reactions Studies
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LENA• Formation of the elements attracts our curiosities• Measurements of relevant Astrophysical Reaction rates are very difficult
– Rates change drastically with energy (star temperature) – Low energies are most important– Hindered by Coulomb force
Energy (keV)
50 150 250 350 4501
100
10000
1E+06
1E+08
1E+10
1E+12
1E+14
Cro
ss s
ect
ion [
Arb
. U
nit
s)Cross section
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LENA
Ge DetectorTarget Assembly
NaI Annulus
Ge - NaI Detector Setup
Lead Shield
Shield Low Energy Environmental Background
Veto High Energy Cosmic Rays
Coincidence Gate On -rays Of Interest
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Weak Interaction Studies
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Fundamental Physics Quantities
• EDM
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HIGS Laboratory
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Nucleon Structure
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Nucleon Structure
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Nuclear Spectroscopy
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Nuclear Astrophysics
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Tandem Vander graph Lab
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Few-body dynamics• n-d breakup
• For the simple 3-body system, we are unable to calculate simple observables.
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Few-body dynamics
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Nuclear Spectroscopy
• Nuclear Resonance Flouresence– Resonant -ray scattering
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Before too longthings are out of control