Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 5, Problem 5.38P
(a)
To determine
The number of collisions in graphite required to reduce the energy of 2.5 MeV to 1% of 2.5 MeV.
(b)
To determine
The number of collisions in graphite required to reduce the energy of 2.5 MeV to 0.025 eV.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A certain medium has the following properties: Σs = 0.1 cm−1,Σa = 0.01 cm−1.
a) What is the probability that a neutron will travel 1 cm in this medium without
interacting with a nucleus?
b) If the neutron speed is 2 ×105 cm s−1, what is the average time between scattering
collisions?
A 2.0-MeV neutron is emitted in a fission reactor. If it loses one-half its kinetic energy in each collision with a moderator atom, how many collisions must it undergo to reach an energy associated with a gas at a room temperature of 20.0°C
In a scattering experiment, an alpha particle A is projected with the velocity up = -(600 m/s)i + (750 m/s)j - (800 m/s)k into a stream of
oxygen nuclei moving with a common velocity vo = (630 m/s)j. After colliding successively with nuclei B and C, particle A is observed
to move along the path defined by the Points A₁(280, 240, 120) and A2(360, 320, 160), while nuclei B and Care observed to move
along paths defined, respectively, by B₁(147, 220, 130), B2(114, 290, 120), and by C₁(240, 232, 90) and C₂(240, 280, 75). All paths are
along straight lines and all coordinates are expressed in millimeters. Knowing that the mass of an oxygen nucleus is four times that of
an alpha particle, determine the speed of each of the three particles after the collisions.
The speed of particle A is
The speed of particle B is
The speed of particle Cis
m/s.
m/s.
m/s.
Chapter 5 Solutions
Introduction To Health Physics
Ch. 5 - Prob. 5.1PCh. 5 - Prob. 5.2PCh. 5 - Prob. 5.3PCh. 5 - Prob. 5.4PCh. 5 - Prob. 5.5PCh. 5 - Prob. 5.6PCh. 5 - Prob. 5.7PCh. 5 - Prob. 5.8PCh. 5 - Prob. 5.9PCh. 5 - Prob. 5.10P
Ch. 5 - Prob. 5.11PCh. 5 - Prob. 5.12PCh. 5 - Prob. 5.13PCh. 5 - Prob. 5.14PCh. 5 - Prob. 5.15PCh. 5 - Prob. 5.16PCh. 5 - Prob. 5.17PCh. 5 - Prob. 5.18PCh. 5 - Prob. 5.19PCh. 5 - Prob. 5.20PCh. 5 - Calculate the probability that a 2-MeV photon in a...Ch. 5 - Prob. 5.22PCh. 5 - Prob. 5.23PCh. 5 - Prob. 5.24PCh. 5 - Prob. 5.25PCh. 5 - Prob. 5.26PCh. 5 - Prob. 5.27PCh. 5 - Prob. 5.28PCh. 5 - Prob. 5.29PCh. 5 - Prob. 5.30PCh. 5 - Prob. 5.31PCh. 5 - Prob. 5.32PCh. 5 - Prob. 5.33PCh. 5 - Prob. 5.34PCh. 5 - Prob. 5.35PCh. 5 - Prob. 5.36PCh. 5 - Prob. 5.37PCh. 5 - Prob. 5.38PCh. 5 - Prob. 5.39PCh. 5 - Prob. 5.40PCh. 5 - A 1-M solution of boric acid, H3BO3 , is...Ch. 5 - Prob. 5.42PCh. 5 - Prob. 5.43PCh. 5 - Prob. 5.44PCh. 5 - Prob. 5.45PCh. 5 - Prob. 5.46PCh. 5 - Prob. 5.47PCh. 5 - Prob. 5.49PCh. 5 - Prob. 5.50PCh. 5 - Prob. 5.54PCh. 5 - What is the range in tissue of the beta particles...Ch. 5 - Prob. 5.56P
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A beam of 2 Mev neutrons is incident on a slab of heavy water (D2O). The total cross-sections of deuterium and oxygen at this energy are 2.6 b and 1.6 b, respectively. A) What is the macroscopic total cross section of D2O at 2 Mev? B) How thick must the slab be to reduce the intensity of uncollided beam by a factor of 10? C) If an incident neutron has a collision in the slab, what is the relative probability that it collides with deuterium?arrow_forwardAlpha particles are projected toward a gold foil from a distance that is sufficiently large to consider the Coulomb force negligible. The gold nuclei have 118 neutrons and 79 protons. If a 3.60 MeV alpha particle has a scattering angle of 180° and the gold nucleus does not recoil, determine the distance of closest approach of the alpha particle.arrow_forwardOutside the nucleus, the neutron itself is radioactive and decays into a proton, an electron, and an antineutrino. The half-life of a neutron (mass = 1.675 × 10-27 kg) outside the nucleus is 10.4 min. On average, over what distance x would a beam of 3.14-eV neutrons travel before the number of neutrons decreased to 75.0% of its initial value? Ignore relativistic effects. X =arrow_forward
- A single alpha particle carries a kinetic energy of 6 MeV. What is the maximum amount of energy (in keV) the alpha particle may lose in a single electronic collision? Please use equations derived from (I) the principles of classical mechanics and (II) the principles of relativistic mechanics for the calculation and find whether the results are comparable.arrow_forwardThe cross section for neutrons of energy 10 eV being captured by silver (p = 10.5 g/cm3) is 17 barns. What is the probability of a neutron being captured as it passes through a layer of silver 2 mm thick?arrow_forwardIf the average fractional energy loss per collision in hydrogen is 0.63, what will be the energy of a 2 MeV neutron after (a) 5 collision? (b) 10 collisions?arrow_forward
- Natural uranium contains the common isotope 238 U and the uncommon isotope 235U. The principal mecha- nism of fission of natural uranium isotopes, 238U and 235U, is neutron capture with the formation of compound nuclei 23ºU and 236U in excited state. The neutron binding energies in 239U and 236U are 5.5 and 6.8 MeV, respectively. The fission barrier heights are 7.1 and 6.5 MeV for 239U and 236U, respectively. Discuss what happens when 235U and 235U are exposed to slow (thermal) neutrons (with kinetic energies less than 0.5 keV) or fast neutrons (with kinetic energies on the order of 2 MeV).arrow_forwardIn an experiment, it was observed that a backward scattered ( an angle greater or equal to 90 degrees) alpha particles formed a beam that was energetic and was directed at a piece of gold foil as thin as 6.0 * 10^-7m. Assuming that an alpha particle scatters from the foil, what is the maximum scattering angle?arrow_forwardIn a neutron-activation experiment, a flux of 108 neutrons/cm2sec is incident normally on a foil of area 1 cm?, density 1022 atoms/cm3 , and thickness 10-2 cm. The target nuclei have a total cross section for neutron capture of 1 barn (10-24 cm2), Find the number of b ( the light particle) per second ? 104 particle/sec 102 particle/sec 106 particle/sec 108 particle/sec Clear my choicearrow_forward
- a) The ILL powder diffractometer uses the pyrolytic graphite (002) Bragg reflection to monochromatize the incident neutron beam from the “white” spectrum of the reactor, what is the ki of the neutron beam? What is the Ei in unit of meV? The lattice parameter c = 6.71 Å for pyrolytic graphite (PG).b) When the Ge (311) monochromator is switched in, what is the ki and what is the Ei? Germanium crystalizes in a cubic structure of the lattice parameter a = 5.66 Å.c) Silicone also crystalizes in a cubic structure of lattice parameter a = 5.43 Å, which of itsBragg peaks of the type (311), (622), (933), ... , (3n,n,n) can be measured using a) PG(002) or b) Ge (311) monochromator?arrow_forwardThe cross section for a 2.0-MeV neutron (a typical energy for a neutron released in fi ssion) being absorbed by a 238U nucleus and producing fi ssion is 0.68 barn. For a pure 238U sample of thickness 3.2 cm, what is the probability of a 2.0-MeV neutron producing fi ssion? (p = 19 g/cm3 for uranium)arrow_forwardWhen an alpha particle collides elastically with a nucleus, the nucleus recoils. Suppose a 6.00 MeV alpha particle has a head-on elastic collision with a silver-108 nucleus that is initially at rest. (a) What is the kinetic energy of the recoiling nucleus? MeV (b) What is the kinetic energy of the rebounding alpha particle? MeVarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Modern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage Learning
Classical Dynamics of Particles and SystemsPhysicsISBN:9780534408961Author:Stephen T. Thornton, Jerry B. MarionPublisher:Cengage Learning
Modern Physics
Physics
ISBN:9781111794378
Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher:Cengage Learning
Classical Dynamics of Particles and Systems
Physics
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Cengage Learning