Rad Data Handbook 20.. - Voss Associates
Rad Data Handbook 20.. - Voss Associates
Rad Data Handbook 20.. - Voss Associates
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RADIATION INTERACTIONS<br />
Charged Particles<br />
- +<br />
Ionization, Excitation, Bremsstrahlung (â ), Annihilation (â )<br />
Neutrons<br />
Scattering (E > 0.025 eV)<br />
Elastic (energy and momentum are conserved)<br />
Inelastic (photon emitted)<br />
Absorption (E < 0.025 eV)<br />
<strong>Rad</strong>iative Capture (n, ã)<br />
Particle Emission (n, á) (n, p) (n, n)<br />
Fission (n, f)<br />
Gamma or X-ray photons<br />
Photoelectric Effect (generally < 1 MeV)<br />
Compton Scattering (generally 200 keV - 5 MeV)<br />
Pair Production (minimum 1.022 MeV)<br />
Scattered Photon<br />
T' = T / [1 + T(1 - cos è) / m0c 2]<br />
2<br />
where c = 931.5 MeV / amu<br />
Bremsstrahlung<br />
emitted energy is ~ 1/3 of the electron energy<br />
Photon Attenuation: I<br />
x<br />
= I0e µx<br />
Interaction Probability per gram:<br />
3 3<br />
Photoelectric Z / E<br />
Compton independent of Z<br />
Pair Production Z 1<br />
µ<br />
Total<br />
= µ<br />
pe<br />
+ µ<br />
cs<br />
+ µ<br />
cc<br />
W<br />
Air<br />
= 33.9 eV per ion pair<br />
Specific Ionization = S/W (i.p. / cm)<br />
52<br />
RADIATION INTERACTIONS<br />
Charged Particles<br />
- +<br />
Ionization, Excitation, Bremsstrahlung (â ), Annihilation (â )<br />
Neutrons<br />
Scattering (E > 0.025 eV)<br />
Elastic (energy and momentum are conserved)<br />
Inelastic (photon emitted)<br />
Absorption (E < 0.025 eV)<br />
<strong>Rad</strong>iative Capture (n, ã)<br />
Particle Emission (n, á) (n, p) (n, n)<br />
Fission (n, f)<br />
Gamma or X-ray photons<br />
Photoelectric Effect (generally < 1 MeV)<br />
Compton Scattering (generally 200 keV - 5 MeV)<br />
Pair Production (minimum 1.022 MeV)<br />
Scattered Photon<br />
T' = T / [1 + T(1 - cos è) / m0c 2]<br />
2<br />
where c = 931.5 MeV / amu<br />
Bremsstrahlung<br />
emitted energy is ~ 1/3 of the electron energy<br />
Photon Attenuation: I<br />
x<br />
= I0e µx<br />
Interaction Probability per gram:<br />
3 3<br />
Photoelectric Z / E<br />
Compton independent of Z<br />
Pair Production Z 1<br />
µ<br />
Total<br />
= µ<br />
pe<br />
+ µ<br />
cs<br />
+ µ<br />
cc<br />
W<br />
Air<br />
= 33.9 eV per ion pair<br />
Specific Ionization = S/W (i.p. / cm)<br />
52<br />
RADIATION INTERACTIONS<br />
Charged Particles<br />
- +<br />
Ionization, Excitation, Bremsstrahlung (â ), Annihilation (â )<br />
Neutrons<br />
Scattering (E > 0.025 eV)<br />
Elastic (energy and momentum are conserved)<br />
Inelastic (photon emitted)<br />
Absorption (E < 0.025 eV)<br />
<strong>Rad</strong>iative Capture (n, ã)<br />
Particle Emission (n, á) (n, p) (n, n)<br />
Fission (n, f)<br />
Gamma or X-ray photons<br />
Photoelectric Effect (generally < 1 MeV)<br />
Compton Scattering (generally 200 keV - 5 MeV)<br />
Pair Production (minimum 1.022 MeV)<br />
Scattered Photon<br />
T' = T / [1 + T(1 - cos è) / m0c 2]<br />
2<br />
where c = 931.5 MeV / amu<br />
Bremsstrahlung<br />
emitted energy is ~ 1/3 of the electron energy<br />
Photon Attenuation: I<br />
x<br />
= I0e µx<br />
Interaction Probability per gram:<br />
3 3<br />
Photoelectric Z / E<br />
Compton independent of Z<br />
Pair Production Z 1<br />
µ<br />
Total<br />
= µ<br />
pe<br />
+ µ<br />
cs<br />
+ µ<br />
cc<br />
W<br />
Air<br />
= 33.9 eV per ion pair<br />
Specific Ionization = S/W (i.p. / cm)<br />
52<br />
RADIATION INTERACTIONS<br />
Charged Particles<br />
- +<br />
Ionization, Excitation, Bremsstrahlung (â ), Annihilation (â )<br />
Neutrons<br />
Scattering (E > 0.025 eV)<br />
Elastic (energy and momentum are conserved)<br />
Inelastic (photon emitted)<br />
Absorption (E < 0.025 eV)<br />
<strong>Rad</strong>iative Capture (n, ã)<br />
Particle Emission (n, á) (n, p) (n, n)<br />
Fission (n, f)<br />
Gamma or X-ray photons<br />
Photoelectric Effect (generally < 1 MeV)<br />
Compton Scattering (generally 200 keV - 5 MeV)<br />
Pair Production (minimum 1.022 MeV)<br />
Scattered Photon<br />
T' = T / [1 + T(1 - cos è) / m0c 2]<br />
2<br />
where c = 931.5 MeV / amu<br />
Bremsstrahlung<br />
emitted energy is ~ 1/3 of the electron energy<br />
Photon Attenuation: I<br />
x<br />
= I0e µx<br />
Interaction Probability per gram:<br />
3 3<br />
Photoelectric Z / E<br />
Compton independent of Z<br />
Pair Production Z 1<br />
µ<br />
Total<br />
= µ<br />
pe<br />
+ µ<br />
cs<br />
+ µ<br />
cc<br />
W<br />
Air<br />
= 33.9 eV per ion pair<br />
Specific Ionization = S/W (i.p. / cm)<br />
52