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A beam of a single energy 7-ray is attenuated to 37% of its original intensity by...
Photon Interactions 137Cs is a common gamma-ray source with photon energy of 662 keV. [3 Marks]...
Photon Interactions 137Cs is a common gamma-ray source with photon energy of 662 keV. [3 Marks] Calculate the energy of Compton scattered photon at an angle of 120o. [3 Marks] Calculate the energy difference between the photo-peak and the Compton edge in the response of a scintillator detector in 137Cs spectroscopy. [4 Marks] What thickness of a lead target is needed to reduce the radiation intensity of 100 keV photons down to 10% of its original intensity? The mass attenuation...
a) Define the terms linear ottenuation coefficient and mass attenuation coefficient and state the 6. units of measu...
a) Define the terms linear ottenuation coefficient and mass attenuation coefficient and state the 6. units of measurement of each quantity. b) A layer of homogeneous material with physical density p and linear attenuation coefficient μ has uniform thickness t.A narrow beam of monoenergetic x-radiation is incident on this layer at right angles. State the relationship between the transmitted intensity Ivan and the incident e. Hence obtain an expression for the attenuation A defined as A = 1 intensity c)...
The X-ray experiment in the 1st year laboratory involves a high voltage (up to 28 kV)...
The X-ray experiment in the 1st year laboratory involves a high voltage (up to 28 kV) source of electrons which hit a target made of copper. This causes the electrons to decelerate, which results in the emission of "Bremstrahlung" X-rays, as well as characteristic peaks. The maximum X-ray energy is 28 keV. The door of the X-ray set is made of leaded glass. This attenuates the X-rays, according to the following equation: lo exp (-ut) Here l is the transmitted...
8. What thickness of cadmium is needed to reduce the intensity of an incident beam of...
8. What thickness of cadmium is needed to reduce the intensity of an incident beam of thermal neutrons to 10% of its original level? Assume a thermal neutron cross section of 2520 barns, an atomic mass of 112.411 amu and a specific gravity of 8.65.
Cfth iroffn the source 7. A certain x ray exposure requires 1.8 mm Al to reduce the radiation int...
Cfth iroffn the source 7. A certain x ray exposure requires 1.8 mm Al to reduce the radiation intensity from 250 Gya to 125 Gya. What is the half value layer of this x ray beam? How many additional half value layers would be required to reduce the intensity to approximately 31 Gya? Type your name in the upper-right corner of this page next to Last Name Save your file as a Word document (docx) Include the term Quantity and...
d. 1, 2 and 3 134. A capsule on the well counted 80,000 cpm. It was...
d. 1, 2 and 3 134. A capsule on the well counted 80,000 cpm. It was then dissolved into 1000 ml of water and a 5 ml sample was counted in the well and gave 4000 cpm. Determine the geometry factor for changing on the well counts to in the well counts: a. 50,000 b. 10 c. 5 d. 0.10 135. How many Mev are in one kev: a. 10-6 b) 10-3 c. 106 d. 103 136. The amount of...
Gamma-rays (Y-rays) are highly energetic electromagnetic radiation that are emitted when the nuclei undergo transitions in...
Gamma-rays (Y-rays) are highly energetic electromagnetic radiation that are emitted when the nuclei undergo transitions in the energy levels. The energy of the y-rays is upward of 100 keV. Due to the high energy, the rays are not appreciably absorbed by even several centimeters of materials such as concrete or wood. However, dense metals such lead, are effective Y-ray absorbers. The amount y-rays that are absorbed depends on the material and the energy of the gamma-rays, the higher the energy,...
A cantilevered steel beam has an extensible wire of unknown material connected at its endpoint (see...
A cantilevered steel beam has an extensible wire of unknown material connected at its endpoint (see diagram). A weight of 250 N is seen hanging from the wire. When beam- wire-mass vibrates, it acts like a single degree of freedom system. Given the following parameters: Lwire 4 meters Awire-0.11 m2 Ewire=70 GPa Lbeam-6 m Ebeam 206 GPa Ibcam-0.25 m2 L EI a) Determine the equivalent spring constant for the system. b) Find the natural frequency of the system c) If...
A wood beam (1) is reinforced on its lower surface by a steel plate (2) as...
A wood beam (1) is reinforced on its lower surface by a steel
plate (2) as shown in the figure. Dimensions of the cross section
are b 1 = 220 mm , d = 385 mm , b 2 = 190 mm , and t = 25 mm . The
elastic moduli of the wood and steel are E 1 = 12.5 GPa and E 2 =
200 GPa , respectively. The allowable bending stresses of the wood
and steel...
A horizontal spring of spring constant k = 125N/m is resting at its equilibrium length. One end o...
A horizontal spring of spring constant k = 125N/m is resting at its equilibrium length. One end of the spring is attached to a wall, and the other end is attached to a mass M = 200g. The whole system is immersed in a viscous fluid with linear drag coefficient b = 0.1 kg/s. The mass is pulled 10cm from its equilibrium position and released from rest. (a) (0.5 pt) What would be the oscillation period if the system were...
a) Define the terms linear ottenuation coefficient and mass attenuation coefficient and state the 6. units of measurement of each quantity. b) A layer of homogeneous material with physical density p and linear attenuation coefficient μ has uniform thickness t.A narrow beam of monoenergetic x-radiation is incident on this layer at right angles. State the relationship between the transmitted intensity Ivan and the incident e. Hence obtain an expression for the attenuation A defined as A = 1 intensity c)...
The X-ray experiment in the 1st year laboratory involves a high voltage (up to 28 kV) source of electrons which hit a target made of copper. This causes the electrons to decelerate, which results in the emission of "Bremstrahlung" X-rays, as well as characteristic peaks. The maximum X-ray energy is 28 keV. The door of the X-ray set is made of leaded glass. This attenuates the X-rays, according to the following equation: lo exp (-ut) Here l is the transmitted...
Cfth iroffn the source 7. A certain x ray exposure requires 1.8 mm Al to reduce the radiation intensity from 250 Gya to 125 Gya. What is the half value layer of this x ray beam? How many additional half value layers would be required to reduce the intensity to approximately 31 Gya? Type your name in the upper-right corner of this page next to Last Name Save your file as a Word document (docx) Include the term Quantity and...
d. 1, 2 and 3 134. A capsule on the well counted 80,000 cpm. It was then dissolved into 1000 ml of water and a 5 ml sample was counted in the well and gave 4000 cpm. Determine the geometry factor for changing on the well counts to in the well counts: a. 50,000 b. 10 c. 5 d. 0.10 135. How many Mev are in one kev: a. 10-6 b) 10-3 c. 106 d. 103 136. The amount of...
Gamma-rays (Y-rays) are highly energetic electromagnetic radiation that are emitted when the nuclei undergo transitions in the energy levels. The energy of the y-rays is upward of 100 keV. Due to the high energy, the rays are not appreciably absorbed by even several centimeters of materials such as concrete or wood. However, dense metals such lead, are effective Y-ray absorbers. The amount y-rays that are absorbed depends on the material and the energy of the gamma-rays, the higher the energy,...
A cantilevered steel beam has an extensible wire of unknown material connected at its endpoint (see diagram). A weight of 250 N is seen hanging from the wire. When beam- wire-mass vibrates, it acts like a single degree of freedom system. Given the following parameters: Lwire 4 meters Awire-0.11 m2 Ewire=70 GPa Lbeam-6 m Ebeam 206 GPa Ibcam-0.25 m2 L EI a) Determine the equivalent spring constant for the system. b) Find the natural frequency of the system c) If...
A wood beam (1) is reinforced on its lower surface by a steel
plate (2) as shown in the figure. Dimensions of the cross section
are b 1 = 220 mm , d = 385 mm , b 2 = 190 mm , and t = 25 mm . The
elastic moduli of the wood and steel are E 1 = 12.5 GPa and E 2 =
200 GPa , respectively. The allowable bending stresses of the wood
and steel...
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