What is the range of strong nuclear force

Exchange Forces Exchange Forces All four of the fundamental forces involve the exchange of one or more particles. Even the underlying Such exchange forces may be either attractive or repulsive, but are limited in range by the nature of the exchange force. The maximum Force Exchange particle R Nave Range of Forces If a force involves the 2 can be exchanged if it does not go outside the bounds of the uncertainty principle in the form A particle which can exist only within the constraints of the uncertainty principle is called a "virtual particle", and the time in the expression above represents the maximum lifetime of the virtual exchange particle. Since this exchange particle cannot exceed the speed limit of the universe, it cannot travel further than c times that lifetime. The maximum range of the force would then be on the order of Note that this expression implies that a zero mass for the exchange particle implies a force of infinite range. The rest masses of the exchange particles for the electromagnetic force and gravity, the photon and the R Nave Range of Exchange Force Using the approximate m = x10^ kg = MeV/c 2 = GeV/c 2 m = m electron = m proton could give a range of : Range = x10^ m = fermi* = proton radii**. The range expression can be explored numerically by entering masses or rest mass energies, like those of the * 1 fermi = 10 -15 meters. **calculated radius using nominal 17 kg/m 3. R Nave Pion Range of Strong Force An estimate of the range of the is used with...

The strong interaction or strong force is one of the gluons. The strong nuclear force confines quarks into hadron particles and acts to hold neutrons and protons together in nuclei. In general, the strong interaction is a very complicated interaction because it significantly varies with distance. The strong nuclear force holds most ordinary matter together because it confines quarks into From this point of view, we have to distinguish between: • Fundamental Strong Force. The fundamental strong force, or the strong force, is a very short range (less than about 0.8 fm, the radius of a nucleon) force that acts directly between quarks. This force holds quarks together to form protons, neutrons, and other hadron particles. The strong interaction is mediated by the exchange of massless particles called gluons that act between quarks, antiquarks, and other gluons. • Residual Strong Force. The residual strong force, also known as the nuclear force, is a very short range (about 1 to 3 fm) force, which acts to hold neutrons and protons together in nuclei. In nuclei, this force acts against the enormous repulsive electromagnetic force of the protons. The term residual is associated with the fact that it is the residuum of the fundamental strong interaction between the quarks that make up the protons and neutrons. The residual strong force acts indirectly through the virtual π and ρ mesons, which transmit the force between nucleons that holds the nucleus together. In strong interactio...

• In the nucleus, there are electrostatic forces between the protons due to their electric charge and gravitational forces due to their mass • Comparatively, gravity is a very weak force and the electrostatic repulsion between protons is therefore much stronger than their gravitational attraction • If these were the only forces, the nucleus wouldn’t hold together • Therefore, the force that does hold the nucleus together is called the strong nuclear force • The strong nuclear force keeps the nucleus stable since it holds quarks together • Since protons and neutrons are made up of quarks, the strong force keeps them bound within a nucleus • The key features of this graph are that the strong nuclear force is: • Repulsive closer than around 0.5 fm • Attractive up to around 3.0 fm • Reaches a maximum attractive value at around 1.0 fm (the typical nuclear separation) • Becomes zero after 3.0 fm • In comparison to other fundamental forces, the strong force therefore has a very small range (only up to 3.0 fm) Katie has always been passionate about the sciences, and completed a degree in Astrophysics at Sheffield University. She decided that she wanted to inspire other young people, so moved to Bristol to complete a PGCE in Secondary Science. She particularly loves creating fun and absorbing materials to help students achieve their exam potential.

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