A beam of 1 eV neutrons hits a target. The density of the beam is 2 × 108 n/cm3. Calculate the intensity of the beam.
A beam of 1 eV neutrons hits a target. The density of the beam is 2...
2. A beam of 100 keV neutrons is sent through a tank of water (H20, p = 1 g/cm3). The neutron scattering cross-sections of hydrogen and oxygen are os(H, 100 keV) = 12.5 b, os(0, 100 keV) = 3.6 b. (a) What are the macroscopic scattering cross-sections for this beam of neutrons from the hydrogen and oxygen? (b) The neutron beam has an initial intensity of 105 neutrons/second, after passing through 2.5 cm of water, what is the beam intensity...
A beam of thermal neutrons (K.E. = 0.040 eV) scatters from a crystal with interatomic spacing 0.30 nm. What is the angle of the first-order Bragg peak?
A radiation shield is used to attenuate a neutron beam of initial intensity L=1010 [neutrons / (cm².sec)]. If the shield's macroscopic total cross section is , = 0.10 cm-1, what would be the thickness of the shield for attenuating the neutron beam’s intensity by a factor of 1 million (106) times, considering an exponential attenuation of the beam? Using the exponential attenuation law, calculate the e-folding distance (the thickness of a shield that would attenuate a beam of neutrons by...
Suppose we consider a beam of neutrons incident upon a thin target with a flux of 1012 neutrons/cm2-sec. Suppose further that the total cross section for the nuclei in this target is 4 b. Using this information, determine how long one would have to wait, on the average, for a given nucleus in the target to suffer a neutron interaction. I know I am supposed to use the reaction rate of a thin target. just need to see some explain...
The neutrons in a parallel beam, each having kinetic energy 0.035 eV , are directed through two slits 0.50 mm apart. How far apart will the interference peaks be on a screen 1.1 m away? [Hint: First find the wavelength of the neutron.]
Please answer question with formulas included please.
3. (25) Assume that you have a beam of thermal energy neutrons with an initial intensity of 104 n/cm's: a) What is the neutron density in the beam? b) Calculate the uncollided neutron beam intensity after passing through cm of pure water. How many neutrons were absorbed?
(5) Consider the figure below, showing the front of a brick-shaped object, with each mono-velocity beam completely covering the face of the object that it strikes. The object has depth Δ. Beam 1 travels in the -ex direction. Beam 2 travels in the +êy direction. You are given Σ,-Σ,-0.6 cm-1, 10 n/cm n2 105 n/em V1 = V2 = 1of cm/s (a) [10 points] "Calculate" the scalar flux at the center of the object. (b) [5 points] "Calculate" the net...
An archer shoots at a target and hits the target with the probability 1 /4. Let X be a random variable representing the number of shots preceding the first target hit. Find the distribution of X. Calculate its expected value and variance.
Calculate the macroscopic cross absorption cross section Σa for (a) Water of unit density at 0.0253 eV (b) Water of density 0.7 g/cm3 at 0.0253 eV (c) Water of density 0.7 g/cm3 at 1 eV
A beam of 6.61-MeV protons is incident on a target of 27 Al . Those that collide produce the reaction 13 p 27Al 27Sin 13 14 ( 27 Si has mass 26.986 721 u.) Ignoring any recoil of the product nucleus, determine the kinetic energy of the emerging neutrons.