Lecture2 - ENU 4612C/5615C Nuclear Radiation Detection and...

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ENU 4612C/5615C Nuclear Radiation Detection and Instrumentation Lecture 2 Radiation Interaction (1)
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Introduction 1. 2. 3. 4.
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1. Interaction of Heavy Charged Particles e e e Ion pair Ionization Excitation + + α
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Linear Stopping Power E v I v F NZ v m z e dx dE S Bethe 1 1 ) , ( 4 : Formula 2 2 0 2 4 = = π 1. Interaction of Heavy Charged Particles + + α track distance dx dE dx dE “Bragg curve” E dx dE S =
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Range 1. Interaction of Heavy Charged Particles Range straggling m R 0.5 0 / I I Monoenergetic charged particle source t t Detector Absorber
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Stopping Time K = 0.6 Scaling Laws Bragg-Kleeman formula 1. Interaction of Heavy Charged Particles E m amu MeV s m K R E mc Kc R Kv R v R T A 2 / 5 . 931 ) / 10 x 3 ( 2 8 2 = = = > < = 0 1 1 0 0 1 A A R R ρ Note: accuracy decreases with increasing differences in materials (A)
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Example – Calculate the time to stop a 3 MeV protons in Calcium (assuming that Ca is sufficiently thick). Hint: Use Figure 2.7 (p. 36), to find the range of the protons in Silicon
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This note was uploaded on 12/10/2011 for the course ENU 4612c taught by Professor Ghita during the Fall '11 term at University of Florida.

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Lecture2 - ENU 4612C/5615C Nuclear Radiation Detection and...

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