Physics and Engineering of Radiation Detection
96 Chapter 2. Interaction of Radiation with Matter The reader might be wondering why this process is termed as triplet productio ...
2.3. Interaction of Photons with Matter 97 This means that for heavy elements the pair production cross section is significantly ...
98 Chapter 2. Interaction of Radiation with Matter saw earlier, are fairly complicated, but their overall effect on a beam of ph ...
2.3. Interaction of Photons with Matter 99 mean free path can be defined as the distance a photon beam will travel such that its ...
100 Chapter 2. Interaction of Radiation with Matter Therefore usingI=I 010 −^4 in equation 2.3.33 we can determine the required ...
2.3. Interaction of Photons with Matter 101 Fig.2.3.9 shows the mass attenuation coefficients of potassium and lead. As one woul ...
102 Chapter 2. Interaction of Radiation with Matter I 0 d Source I Detector Collimator Collimator Detector Figure 2.3.10: Sketch ...
2.3. Interaction of Photons with Matter 103 Example: Estimate the mean free path of 150keV x-ray photons traveling in ordinary w ...
104 Chapter 2. Interaction of Radiation with Matter Here the subscripts 1, 2, and 3 represent the three materials. Using this re ...
2.4. Interaction of Heavy Charged Particles with Matter 105 Solution: According to equation 2.3.47, the intensity of the photons ...
106 Chapter 2. Interaction of Radiation with Matter few deflected at very large angles. This experiment proved that most of the ...
2.4. Interaction of Heavy Charged Particles with Matter 107 θ 0 20 40 60 80 100120140 160180 N (relative) 10 -8 10 -7 10 -6 10 - ...
108 Chapter 2. Interaction of Radiation with Matter cases and is also consistent with the experimental observation depicted in F ...
2.4. Interaction of Heavy Charged Particles with Matter 109 scattered at 10^0 and 30^0. dσ dΩ ∣ ∣ ∣ θ=10^0 =3. 597 × 10 −^28 1 s ...
110 Chapter 2. Interaction of Radiation with Matter 2.4.B Passage of Charged Particles through Matter There is a fundamental dif ...
2.4. Interaction of Heavy Charged Particles with Matter 111 Here eis the unit electron charge, meis the mass of electron, Neis t ...
112 Chapter 2. Interaction of Radiation with Matter Let us now define a cylinder of radiusbaround the pathxof motion of ion with ...
2.4. Interaction of Heavy Charged Particles with Matter 113 x electron ion b Figure 2.4.4: Definition of impact param- eter for ...
114 Chapter 2. Interaction of Radiation with Matter convenient to write the above equation in the form [ − dE dx ] Bethe−Bloch = ...
2.4. Interaction of Heavy Charged Particles with Matter 115 <Z/A>,and<δ>. However these expressions do not give reli ...
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