Fission

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Fission

Contents 1 Definition 2 Important features of: 3 How it works 4 Energy released From Each Fission 5 Controls of Nuclear Fission 6 Fission Informative Site

[edit] Definition

Fission is the process of releasing energy when the mass between the product nuclei and the reactants has been concerted into energy in order to obtain a much larger percentage of nuclei of a target involved in releasing energy.

[edit] Important features of:

• additional neutrons are emitted
• leads to "chain reaction" of neighboring molecules
• low yield of reaction

[edit] How it works

• process produces Fission Products which are "unstable radioactive isotopes produced when a uranium nucleus is split after capturing a neuron.
• neutrons trigger the target nucleus causing it to split into many different components such as: neutrons, fission product, and neutron
• once these products are released create a nuclear chain reaction

[edit] Energy released From Each Fission

(according to PH261 Slides)

   165 MeV   ~ kinetic energy of fission products
     7 MeV   ~ gamma rays
     6 MeV   ~ kinetic energy of the neutrons
     7 MeV   ~ energy from fission products
     6 MeV   ~ gamma rays from fission products
     9 MeV   ~ anti-neutrinos from fission products

---

   200 MeV

[edit] Controls of Nuclear Fission

• Only One neutron out of 2 or 3 will strike another molecules nucleus
• Controlled by a Neutron-Absorbing materialsuch as Graphite

[edit] Fission Informative Site

• [1]
• [2]