*25 SSM (a) A neutron of mass m, and kinetic energy K makes a head-on elastic collision with a stationary atom of mass m. Show that the fractional kinetic energy loss of the neutron is given by ΔΚ 4m,m (m + m,) к K Find AK/K for each of the following acting as the stationary atom: (b) hydrogen, (c) deuterium, (d) carbon, and (e) lead. (f) If K = 1.00 MeV initially, how many such head-on collisions would it take to reduce the neutron's kinetic energy to a thermal value (0.025 eV) if the stationary atoms it collides with are deuterium, a commonly used moderator? (In actual moderators, most collisions are not head-on.)

*25 SSM (a) A neutron of mass m, and kinetic energy K makes a head-on elastic collision with a stationary atom of mass m. Show that the fractional kinetic energy loss of the neutron is given by ΔΚ 4m,m (m + m,) к K Find AK/K for each of the following acting as the stationary atom: (b) hydrogen, (c) deuterium, (d) carbon, and (e) lead. (f) If K = 1.00 MeV initially, how many such head-on collisions would it take to reduce the neutron's kinetic energy to a thermal value (0.025 eV) if the stationary atoms it collides with are deuterium, a commonly used moderator? (In actual moderators, most collisions are not head-on.)

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

*25 SSM (a) A neutron of mass m, and kinetic energy K makes a
head-on elastic collision with a stationary atom of mass m. Show
that the fractional kinetic energy loss of the neutron is given by
ΔΚ
4m,m
(m + m,)
к
K
Find AK/K for each of the following acting as the stationary atom:
(b) hydrogen, (c) deuterium, (d) carbon, and (e) lead. (f) If
K = 1.00 MeV initially, how many such head-on collisions would it
take to reduce the neutron's kinetic energy to a thermal value
(0.025 eV) if the stationary atoms it collides with are deuterium, a
commonly used moderator? (In actual moderators, most collisions
are not head-on.)

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