Neutron Generator Background - Thermo Scientific Home Page
Neutron Generator Background - Thermo Scientific Home Page
Neutron Generator Background - Thermo Scientific Home Page
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<strong>Neutron</strong> <strong>Generator</strong> Analytical Techniques<br />
nelastic Scattering<br />
– Low Z elements<br />
such as C, O, N<br />
– Chemical explosives<br />
detection<br />
n,2n) Multiplication<br />
– High Z elements<br />
such as Bi, Pb, U<br />
– Identify radiation<br />
shielding<br />
ast Fission<br />
– Elements U & Pu<br />
– Special nuclear<br />
materials detection<br />
eutron Slowing Down<br />
– Low Z elements<br />
– Can identify large,<br />
anomalous<br />
concentrations<br />
ransmission/<br />
ttenuation<br />
– Images with contrast<br />
sensitive to low Z<br />
material<br />
Fast <strong>Neutron</strong>s<br />
Inelastic Scattering, (n,2n)<br />
Multiplication, Fission<br />
(n,2n) Multiplication,<br />
Fission<br />
<strong>Neutron</strong> Slowing<br />
Down via Σ<br />
Transmission/<br />
Attenuation<br />
Transmission/<br />
Attenuation<br />
Inelastic Scattering<br />
Prompt Gamma<br />
Prompt <strong>Neutron</strong><br />
Delayed Gamma<br />
Delayed <strong>Neutron</strong><br />
<strong>Neutron</strong> Die-Away<br />
Radiography<br />
Tomography<br />
Associated Particle<br />
Absorption, Fission<br />
Fission<br />
Decay Following<br />
Absorption or Fission<br />
Decay Following<br />
Absorption or Fission<br />
Associated Particle Imaging:<br />
Slow <strong>Neutron</strong>s<br />
• Absorption<br />
– Most elements<br />
– Identify chemical<br />
explosives<br />
• Thermal Fission<br />
– Fissile isotopes of U<br />
and Pu<br />
• Decay<br />
– Medium Z elements<br />
– Helps identify<br />
structural & other<br />
materials<br />
Alpha pulses with<br />
P47 scintillator<br />
(T ½ < 50 ns)
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