A parallel beam of 1-MeV photons is normally incident on a
1.2-cm aluminum slab (ρ =...
A parallel beam of 1-MeV photons is normally incident on a
1.2-cm aluminum slab (ρ = 2.70 g cm–3 ) at a rate of
103 s–1 . The mass attenuation and mass
energy- absorption coefficients are, respectively, 0.0620
cm2 g–1 and 0.0270 cm2
g–1.
What fraction of the photons is transmitted without
interacting?
What fraction of the incident photon energy is transmitted
by the slab?
How much energy is absorbed per second by the
slab?
What fraction of the transmitted energy is carried by the
uncollided photons?
If the mass energy-transfer coefficient is 0.0271
cm2 g–1, what fraction of the initial kinetic
energy transferred to the electrons in the slab is emitted as
bremsstrahlung?
A
parallel beam of 1-MeV photons is normally incident on a sheet of
uranium, 1.0mm thick. The incident beam intensity is
10^4MeVcm-2s-1
1) calculate the energy fluence rate transmitted by the
sheet
2) what fraction of the transmitted energy fluence rate is due
to uncollided photon?
3) what physical processes are responsible for energy transfer
to the sheet?
4) what processes are responsible for energy absorption jn the
sheet?
6. Photons from a 3 MeV gamma source are normally incident on
plane aluminum foil of 1 mm thick.
a) What is the maximum electron kinetic energy expected from
scattering interaction of photons with the foil?
b) What is the minimum photon energy expected
Incident photons of energy 11,905 eV are Compton scattered, and
the scattered beam is observed at 66 degrees relative to the
incident beam. What is the energy of the scattered photons at that
angle, in eV?
A beam of protons, each with energy E=20 MeV, is incident on a
potential step 40 MeV high. Graph using a computer the relative
probability of finding protons at values of x > 0 from x = 0 to
x = 5 fm.
Question c please
3. Suppose three different X-ray photons each with incident
energy of 2.0 MeV are Compton scattered. Photon 1 is slightly
deflected, just 1 degree from its original direction. Photon 2 is
scattered in a direction 60 degrees away from the original
direction and Photon 3 is scattered backwards in the opposite
direction to its original path.
(a) Calculate the change of wavelength for each case. Show your
working.
(b) Suppose instead, the original photon energies were 0.50...
Q10: A narrow beam of 106 ?ℎ????? ?-1 in
normally incident on 8-mm iron sheet. The beam consists of equal
numbers of 400-KeV photons and 1-MeV photons. mass atten coeffs of
Fe: (400KeV = 0.092, 1MeV = 0.06) energy abs coeffs: (400KeV =
0.03, 1MeV = 0.027), use density 7.86 g/cm^3
(a) Calculate the number of ?ℎ????? ?-1 of each
energy that are transmitted without interaction through the
sheet.
(b) How much energy is removed from the narrow beam per...
Consider two photons, one with energy 1 = 2 MeV traveling to the
right, and the other with energy 2 = 3 MeV moving to the left. The
two photons collide head-on and produce a positron-electron pair.
In this problem you will calculate the velocities of the two
particles after the collision. Use the Doppler Shift equation to
find the velocity of a frame of reference S' such that the two
photons have the same energy. Which direct is S
A plane-parallel monoenergetic beam of 1O^I2 uncharged particles
per second
is incident perpendicularly on a layer of material 0.02 m thick,
having a density
p = 11.3 X lo^3 kg/m3. For values of the mass attenuation
coefficient m/p =
1X lo^-3 3 X lo^-4 and 1 X lo^-4 m2/kg, calculate the number of
primary par-
ticles transmitted in 1 minute. Compare in each case with the
approximation
in Eq. (3.5); give percentage errors.
1. In a light foam cooler is a 2.4 kg slab of aluminum at 20C. I
add to it 300 g of ice at -10C. What is the equilibrium
temperature? How much of the ice melts?
2. If I add 30 g of ice at -15C to 100 g of water at 75C, what
is the equilibrium temperature?
3. If 12 g of steam at 100C condenses on a 1500-g iron bar
initially at 10C, what will the equilibrium temperature...
A parallel-plate capacitor is made from two aluminum foil
sheets, each 5.4 cm long and 4.9 cm wide. The two sheets are
separated by a distance of 0.024 mm.
1)
What is the capacitance of this capacitor?
C = μF
2)
If a potential difference of 2 volts is applied across the two
plates of this capacitor, what is the absolute value of the charge
on the plate with the higher voltage?
qhigher = μC
3)
What is the absolute...