What is critical weight?
Critical weight is a concept to which it will encounter nuclear material. In short, a critical amount of material is the amount needed to continue the nuclear reaction as soon as it starts. The beginnings are capable of fissile materials able to maintain the reaction. Because the reaction can be maintained, the material can be used for certain purposes. These purposes include the production of nuclear weapons and creating reactors for energy generation. The most widespread fission materials are Uranium-233, Uran-235 and Plutonium-239. These three materials meet the cleft material criteria, remain around a reasonably long time and can be found in sufficient large quantities to use them for practical fuel.
The nuclear reaction process is somewhat complex, but can be considered simply as a reaction that grows exponentively. In response to the atom of the fission material-let's say that uran-235-car is neutron when it moves around. This causes atom to divide into two smaller atoms and deletes in the processtwo or three other neutrons. These neutrons then fly away and are captured by other Uranu-235 atoms, which in turn distribute and send more or three other neutrons. All this happens in a very, very small amount of time and releases a huge amount of energy.
The concept of critical matter is important, because in order for this reaction to continue and release a huge amount of energy, there must be enough fission material that it can continue. If the critical weight is not achieved, the neutrons present will be reduced, which will be less and less likely over time that the nuclear reaction will be less. Strictly speaking, the term critical mass is used to describe the status of balance, in which sufficient fission materials are present to adhere to the amount of neutrons roughly the same, but the reaction does not create more. However, critical weight is often used to describe what is more precisely called supercritical mass when Dosta is presentThe material of the material that neutrons continue with the collision with atoms fission and release more neutrons, generating energy and heat.
If you want to use fission material in the nuclear weapon, it is clearly important that the material is maintained under critical weight - otherwise the bomb would immediately explode. Usually, two pieces of material are kept separately in the subcritic mass, and when the time is to be detonated, they are thrown together very hard and very quickly. It then creates a supercritical mass and explodes the bomb. If they are not thrown fast enough, then the smaller explosion becomes first and blows two pieces further apart, so there will never be a large explosion - this is often referred to as fizzle.
The critical weight is another dependence on the material used. In the case of Uranus-233, the critical weight is about £ 35 (15 kg). In the case of Uranus-235, the critical weight is about £ 115 (52 kg). And in the case of Plutonia-239, the critical weight is about £ 22 (10 kg). This might seem quite a lot but keep in mind that tY these materials are extremely dense. For most nuclear materials, it reaches a ball that is not much larger than baseball and causes a huge explosion.