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1. A parallel beam of 1-MeV photons is normally incident on a 1.2-cm aluminum slab (p = 2.70 g cm3) at a rate of 10 s. The mass attenuation and mass energy- absorption coefficients are, respectively, 0.0620 cm? g and 0.0270 cm? g!. a. What fraction of the photons is transmitted without interacting? b. What fraction of the incident photon energy is transmitted by the slab? C. How much energy is absorbed per second by the slab? d. What fraction of the transmitted energy is carried by the uncollided photons? e. If the mass energy-transfer coefficient is 0.0271 cm² g, what fraction of the initial kinetic energy transferred to the electrons in the slab is emitted as bremsstrahlung?

1. A parallel beam of 1-MeV photons is normally incident on a 1.2-cm aluminum slab (p = 2.70 g cm3) at a rate of 10 s. The mass attenuation and mass energy- absorption coefficients are, respectively, 0.0620 cm? g and 0.0270 cm? g!. a. What fraction of the photons is transmitted without interacting? b. What fraction of the incident photon energy is transmitted by the slab? C. How much energy is absorbed per second by the slab? d. What fraction of the transmitted energy is carried by the uncollided photons? e. If the mass energy-transfer coefficient is 0.0271 cm² g, what fraction of the initial kinetic energy transferred to the electrons in the slab is emitted as bremsstrahlung?

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1. A parallel beam of 1-MeV photons is normally incident on a 1.2-cm aluminum slab (p = 2.70 g cm3) at a rate of 10 s. The mass attenuation and mass energy- absorption coefficients are, respectively, 0.0620 cm gl and 0.0270 cm² g!. a. What fraction of the photons is transmitted without interacting? b. What fraction of the incident photon energy is transmitted by the slab? C. How much energy is absorbed per second by the slab? d. What fraction of the transmitted energy is carried by the uncollided photons? e. If the mass energy-transfer coefficient is 0.0271 cm q!, what fraction of the initial kinetic energy transferred to the electrons in the slab is emitted as bremsstrahlung?
Transcribed Image Text:1. A parallel beam of 1-MeV photons is normally incident on a 1.2-cm aluminum slab (p = 2.70 g cm3) at a rate of 10 s. The mass attenuation and mass energy- absorption coefficients are, respectively, 0.0620 cm gl and 0.0270 cm² g!. a. What fraction of the photons is transmitted without interacting? b. What fraction of the incident photon energy is transmitted by the slab? C. How much energy is absorbed per second by the slab? d. What fraction of the transmitted energy is carried by the uncollided photons? e. If the mass energy-transfer coefficient is 0.0271 cm q!, what fraction of the initial kinetic energy transferred to the electrons in the slab is emitted as bremsstrahlung?
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