What is meant by neutron cross section?
What is meant by neutron cross section?
In nuclear and particle physics, the concept of a neutron cross section is used to express the likelihood of interaction between an incident neutron and a target nucleus. The larger the neutron cross section, the more likely a neutron will react with the nucleus.
What does neutron absorption?
The absorption reactions are reactions where the neutron is completely absorbed, and the compound nucleus is formed. This is a very important feature because the mode of decay of such a compound nucleus does not depend on how the compound nucleus was formed.
What is cross section in radiation?
A useful concept in describing the absorption of radiation in matter is called cross section; it is a measure of the probability that photons interact with matter by a particular process.
What is nuclear reaction cross section?
cross section, in nuclear or subatomic particle physics, probability that a given atomic nucleus or subatomic particle will exhibit a specific reaction (for example, absorption, scattering, or fission) in relation to a particular species of incident particle.
Why does the cross section of neutron induced reaction increase with decreasing energy?
The modification of the zero-degree data that is necessary to get correct reaction rates in the above-mentioned model becomes larger and larger as the neutron energy is lowered, and that is the reason that the broadened cross section rises as the neutron energy goes to zero.
What is the principle of neutron activation analysis and how is it used?
Neutron activation analysis (NAA) is an analytical technique that relies on the measurement of gamma rays emitted from a sample that was irradiated by neutrons. The rate at which gamma rays are emitted from an element in a sample is directly proportional to the concentration of that element.
What are the two types of neutron capture process?
Two processes of neutron capture may be distinguished: the r -process, rapid neutron capture; and the s -process, slow neutron capture. If neutrons are added to a stable nucleus, it is not long before the product nucleus becomes unstable and the neutron is converted into a proton.
What is cross section geography?
Definition: Cross-sections are represented on a map by a line which will often be labelled A at one end and B at the other. If you were to slice through the map along this line, and look back, you would be able to see what is happening underneath the ground.
What is cross section Class 10?
Cross section represents a plane made by cutting across something at right angles to its length. If you cut a wire and look straight on you will see a circular plate. The area of this cross section is called its area of cross section.