why does fast nutron undergo fission?
919070
any neutron undergoes fission
581234
In 1938, two German physicists, Otto Hahn and Fritz Straussman, discovered that a neutron caused the nucleus of a uranium atom to split (fission). Other experiments followed that showed that the energy released in fission was about 100 million times greater than a chemical reaction. At the onset of World War II, the military implications of this discovery were readily apparent to leaders of the major powers. Uranium was destined to find new, more important applications beyond its original use as a colorant for glass and ceramics.
9127
In nuclear reactions, MASS is converted into energy.
64677
Hmm, I don't like that previous answer.  There is a certain amount of energy holding together an atom, say uranium 235.  When bombarded with neutrons, the atom breaks apart into 2 different atoms and releases energy.  No energy is created or destroyed, as it only changes the form.
304768
The assembled nucleus has less energy than the collective nucleons. If it did not\n\na) it would not hold together with the collection of + charged protons, and\n\nb) it would not require added energy in the form of colliding particles to make it come apart.
1137622
Fission, Fusion, FFF, Neutron, and dirty.\n\nFission uses something like uranium or plutonium that gets split apart and releases energy.\n\nFusion uses hydrogren to release energy similar to the sun by combining two hydrogens to create a helium.\n\nThe FFF (Fission-Fusion-Fission) is a mix.  A small fission bomb kicks off a fusion reaction which then kicks off another fission reaction.  Fun stuff.\n\nThe neutron bomb is a small fission bomb type, that releases a lot of neutrons which don't harm surrounding structures, but vaporizes water much like a microwave does, cooking people and animals from within.\n\nThe dirty bomb does not require any nuclear process, it just uses radiation.  The effect is much like the neutron bomb, it doesn't do a lot of damage to buildings, but it does hurt people as radiation is quite deadly.\n\nI can't think of any others off the top of my head.
261601
Yes.  Last I heard they put the waste in barrels and bury them underground in an area where accidental leakage has the most difficult route into the surrrounding land and groundwater.\n\nIt's can't be toxic (non-radioactive) because this is the natural byproduct of fission reaction - Uranium or Plutonium after undergoing fission breaks into smaller radioactive fragments of lighter elements which remain in the spent fuel rods.\n\nTechnically it might be possible to render this waste non-radioactive by bombarding it with high energy particles from a particle accelerator and inducing another nuclear reaction after another until the waste undergoes a reaction that stabilizes it and removes or reduces the radioactive content.  \n\nSomething like this would (total guess here) take some 10-100 times the energy that was released.  And i'm not sure it can be done - though theoretically it should be possible - even something like generating antimatter and annihilatng the waste.  Extreme cost, uncertain result.
455666
basically uranium is a material with both neutrons and protons which that are packed in high explosive shape charged spheres the shape charge blows force inward  collasping on the sphere of uranium and causes the neutrons and protons to collide resulting in the mushroom
233396
Nuclear research can bring greater efficiencies to current nuclear processes.  The shape, materials used, and methodologies in maintaining fission are all currently refined and reevaluated to find an optimal solution that would provide greater efficiencies.  Futhermore, technologies on how to deal with current nuclear wastes are essential in solving the contamination problems.  Furthermore, a means of preventing proliferation goes hand in hand with reducing contamination - radioactive wastes can be used as a dirty bomb.  Therefore refinement is essential.  A technology that looked promising was the Integral Fast Reactor (IFR).  This technology reduced the means of proliferation by maintaining the nuclear wastes at an extremely high temperature (molten metal).  Additionally, it was built with intent of never being able to go supercritical - physical properties of the fuel capsules prevented this; temperature would increase the volume of the capsules which would decrease the density required to maintain fission.  Furthermore, the process of pyroprocessing effectively recycled it's wastes so that all actenides and harsh long lasting stuff were removed; wastes had half life of 100 years as opposed to current stuff which last practically forever.  In addition, it was 20% efficient in breeding new fuel as opposed to older breeder reactors which were at 3% fuel recycle.  But, since there was a effective way of recycling fuel, the entire fuel was never disposed, rather it was pyroprocessed and remade without the wastes.\n\nThat is one great benefit of nuclear research.  Others include more efficient propulsion systems for rockets, better sources of energy such as fusion, better medicinal technologies to tag molecules for investigative means, other investigative means unknown to us yet, sensors such as smoke detectors (which contain americium), etc.  The possibilities are limitless.
261993
Nor really.  Human metabolic processes occur on the atomic level (chemistry) whereas fusion occurs on the subatomic nucleus level.\n\nHowever, if exposed to radiation or similar forces, human bodies can undergo nuclear reactions with such radiation.  Incoming radiation can interact with the protons and neutrons of cells' nuclei causing a nuclear reaction.
387527
This fission process is popularly known as "splitting the atom". \n\nA process in which the nucleus of an atom splits into two or more nuclei with the release of energy and neutrons. These neutrons can cause fissions in the nuclei of nearby atoms. Materials which undergo this process (such as plutonium) are said to be 'fissionable.' \n\nI would like to discuss marbles. Everyone's played with marbles at one time or another, right? Well, imagine about 200 marbles lying on a flat surface, all jumbled together, and roughly forming a circle. What would happen if someone took another marble and threw it at them? They would fly all around in different directions and groups, right? That is exactly what happens in nuclear fission. The filled circle is like an atom's nucleus. The marble being thrown is like a "neutron bullet". The only differences are that the marbles are protons and neutrons and the protons and neutrons aren't in a filled circle, but in the actual atom are in the shape of a sphere. Of course, an atom is also a bit more complicated than a pack of marbles.
45782
In most electric power plants, water is heated and converted into steam, which drives a turbine-generator to produce electricity. Fossil-fueled power plants produce heat by burning coal, oil, or natural gas. In a nuclear power plant, the fission of Uranium atoms in the reactor provides the heat to produce steam for generating electricity.\n\nHeat is produced in a nuclear reactor when neutrons strike Uranium atoms causing them to fission in a continuous chain reaction. Control elements, which are made of materials that absorb neutrons, are placed among the fuel assemblies. When the control elements, or control rods as they are often called, are pulled out of the core, more neutrons are available and the chain reaction speeds up, producing more heat. When they are inserted into the core, more neutrons are absorbed, and the chain reaction slows or stops, reducing the heat. \n  Most commercial nuclear reactors use ordinary water to remove the heat created by the fission process. These are called light water reactors. The water also serves to slow down, or "moderate" the neutrons. In this type of reactor, the chain reaction will not occur without the water to serve as a moderator.
986236
No new matter is created by nuclear processes.\nIn fact matter is destroyed thus realising energy.\nIn the process of Fission heavy atoms are split into two or more light atoms and energy. In this case also no new matter is formed. The weight of new atoms is always less than the weight of the original heavy atom.\nIn the process of Fusion two light atoms join to form one heavy atom. In this case also energy is produced at the expense of weight of matter.
119700
An induced nuclear fission event. A thermal (slow-moving) neutron is absorbed by the nucleus of a uranium-235 atom, which in turn splits into fast-moving lighter elements (fission products) and free neutrons. The particular elements and number of neutrons produced by each single fission event are random.Nuclear fission is a process in nuclear physics in which the nucleus of an atom splits into two or more smaller nuclei as fission products, and usually some by-product particles. Hence, fission is a form of elemental transmutation. The by-products include free neutrons, photons usually in the form gamma rays, and other nuclear fragments such as beta particles and alpha particles. Fission of heavy elements is an exothermic reaction and can release substantial amounts of useful energy both as gamma rays and as kinetic energy of the fragments.\n\nNuclear fission is used to produce energy for nuclear power and to drive explosion of nuclear weapons. Fission is useful as a power source because some materials, called nuclear fuels, both generate neutrons as part of the fission process and also undergo triggered fission when impacted by a free neutron. Nuclear fuels can be part of a self-sustaining chain reaction that releases energy at a controlled rate in a nuclear reactor or a very rapid uncontrolled rate in a nuclear weapon.\n\nThe amount of free energy contained in nuclear fuel is millions of times the amount of energy contained in a similar mass of chemical fuel such as gasoline, making nuclear fission a very tempting source of energy; however, the waste products of nuclear fission are highly radioactive and remain so for millennia, giving rise to a nuclear waste problem. Concerns over nuclear waste accumulation and over the immense destructive potential of nuclear weapons counterbalance the desirable qualities of fission as an energy source, and give rise to intense ongoing political debate over nuclear power.
89124
Fusion combines two nuclei making a heavier partical (such as occurs on the sun or any star fusing two hydrogen nuclei into one helium--thus we get the word helios which refers to the sun.)\n\nFission is the breaking apart of one nucleus into two lighter particles. This is what occurs in a nuclear reactor.\n\nFor atomic or nuclear detonation, fission is the process. However, with a hydrogen bomb: fission is the beginning process which generates the necessary heat and force to begin the fusion process on hydrogen (as in what occurs on the sun) which results in a much bigger blast.
288934
Yes it does. In fission, the bigger nuclei breaks into smaller nuclei. If you add up the masses of the smaller nucleii, you will find it short of the bigger nuclei. This is called mass defect. This mass is converted to energy by the relation E=mc^2 . In fusin, two smaller nucleii fuse to form a bigger nuclei, which has less mass than the masses of the two smaller nucleii added. This mass defect is converted to energy here by the equation e=mc^2.
778277
Fission.  Nuclear reactors\nFussion. The sun.