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What does each of the following terms mean? (a) thermal neutron (b) nuclear fission (c) fissile isotope

Welding: Principles and Applications (MindTap Course List)

8th Edition

ISBN:9781305494695

Author:Larry Jeffus

Publisher:Larry Jeffus

Chapter26: Welding Metallurgy

Section: Chapter Questions

Problem 3R: What are the basic units of measure for heat?

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Question

What does each of the following terms mean? (a) thermal neutron (b) nuclear fission (c) fissile isotope

Expert Solution

Step 1

thermal neutron is any free neutron (one that is not bound within an atomic nucleus) that has an average energy of motion (kinetic energy, of about 0.025 eV (about 4.0×10⁻²¹ J or 2.4 MJ/kg,) corresponding to the average energy of the particles of the ambient materials.

Step 2

(b) nuclear fission

Fission is the splitting of an atomic nucleus into two or more lighter nuclei accompanied by energy release, Nuclear ﬁssion is a process where the nucleus of an atom is split into two or more smaller nuclei, known as ﬁssion products.In order to initiate most fission reactions, an atom is bombarded by a neutron to produce an unstable isotope, which undergoes fission. . For example, the fission of one kilogram of uranium releases as much energy as burning around four billion kilograms of coal.

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