The act or process of disintegration of an atomic nucleus into two or more smaller pieces; called also nuclear fission. The process may be spontaneous or induced by capture of neutrons or other smaller nuclei, and usually proceeds with evolution of energy.
A process of evolution that involves the splitting up of a population to form new populations.
the process of using a neutron to split a heavy nucleus into two nuclei with smaller mass numbers
A term defined as the splitting of an atomic nucleus into two smaller nuclei of roughly equal mass. During fission, a fissionable nucleus (such as plutonium) absorbs a neutron, becomes unstable and splits into two nuclei, releasing energy. (Basic Science/Radiography/radiationsources/fission_popup.htm)
( Nuclear) Process where the mass of an atomic nucleus is made smaller by the removal of subatomic particles. This process releases atomic energy in the form of heat and electromagnetic radiation.
The splitting of a heavy nucleus into two parts. This is accompanied by the release of energy and two or more neutrons. It may occur spontaneously or be induced by capture of bombarding particles, generally neutrons.
the nuclear reaction involving the splitting apart of atoms
The process by which a neutron strikes a nucleus and splits it into fragments. During the process of nuclear fission, several neutrons are emitted at high speed, and heat and radiation are released.
Reproduction of a prokaryote by division of a cell into two comparable progeny cells.
The process where a neutron collides with a heavy element like 235U uranium, causing it to fission into two fission fragments, and release some two to three neutrons and approximately 200 MeV of energy. The fission fragments are radioactive, and create the primary concern for waste disposal and accident consequences.
"The nuclear reaction in which a relatively heavier nucleus divides into two or more lighter nuclei with the simultaneous release of energy. In this process a large amount of energy is released.
The nuclear chain reaction which generates heat in a reactor is known as fission. This is because atoms of uranium split up, or undergo fission, and keep the reaction going. (see Fission)
The process of splitting a heavy atom into two or more lighter atoms upon absorption of a neutron. This process generates a large amount of energy and usually at least two neutrons. The act of fissioning is also referred to as burning.
The splitting of the nucleus of an element into fragments. Heavy elements such as uranium or plutonium release energy when fissioned.
The process in which the nucleus of an atom is split to produce heat.
The splitting of a heavy nucleus into two or more radioactive nuclei, accompanied by the emission of gamma rays, neutrons and a significant amount of energy. Fission usually is initiated by the heavy nucleus absorbing a neutron, but it also can occur spontaneously.
The splitting of a nucleus into at least two other nuclei with the release of a relatively large amount of energy.
The process whereby an atomic nucleus of suitable material is split into (generally) two nuclei of lighter elements with the release of substantial amounts of energy and two or more neutrons.
The splitting of a large atom into two atoms of lighter elements. When large atoms such as uranium or plutonium fission, tremendous amounts of energy are released.
The splitting of an atomic nucleus into two or more atomic nuclei accompanied by release of neutrons, photons, and energy in the form of kinetic energy of the fission products. In nuclear weapons, fission occurs mainly as a result of capture of neutrons by nuclei of uranium-235 or plutonium-239.
The process in which heavy nuclei split to form lighter nuclei.
form of cell division in prokaryotes
A nuclear reaction in which a nuclide splits into two smaller nuclides.See fusion.
A process of splitting heavy atoms of uranium or plutonium into lighter elements, thereby releasing energy.
The splitting of a fissionable nucleus into two smaller, nearly equal, radioactive nuclei, accompanied by the emission of two or more neutrons and a significant amount of energy. Fission in a nuclear reactor is initiated by the fissionable nucleus absorbing a neutron.
Division of a cell into two cells by splitting.
the process of splitting the nucleus of an atom into parts
Transverse splitting in two of bacterial cells, asexual.
The process of splitting atomic nuclei by bombarding the nuclei with neutrons. The split nuclei result in the release of enormous amounts of energy and more neutrons capable of splitting other atoms.
Splitting the nucleus of an atom into smaller units.
Asexual reproduction in which the cell divides into two (binary fission) or more (multiple fission) daughter parts, each of which becomes an individual organism.
The spontaneous disintegration of the nucleus of the atom.
The process by which a nucleus of a heavy element, such as uranium, splits into two smaller nuclei, such as barium and krypton, and several neutrons. Much energy is also released. The opposite of fission is fusion. - What Is Cold Fusion
( FIS·sion). Splitting of a band into two or more parts.
The breaking apart of an atom to form two completely different new atoms, with the release of energy.
The division of an atomic nucleus into parts of comparable mass. Generally speaking, fission may occur only in heavier nuclei, such as isotopes of uranium and plutonium. Atomic bombs derive energy from the fission of uranium or plutonium.
The splitting of an atomic nucleus after being struck by a (slow moving) neutron. Neutrons are also released during fission which are then able to cause fission in other nuclei. This leads to a fission chain reaction.
The radioactive decay of a nucleus by splitting into two parts.
An asexual (non-sexual) reproductive process in which a one-cell organism divides into two or more independently maturing cells.
reproduction of some unicellular organisms by division of the cell into two more or less equal parts
bombarding a radioactive isotope with a neutron in order to split the nucleus into smaller parts, releasing energy.
cytoplasmic division of a cell to form two cells, a form of asexual reproduction.
The division of a heavy nucleus into two unequal masses and the emission of neutrons, gamma radiation, and a great deal of energy.
A 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.'
the splitting of a nucleus into at least two other nuclei that releases a large amount of energy. Two or three neutrons are usually released during this transformation. See also fusion.
assexual division of one organism into two or more smaller organisms gametophyte: The haploid (1n) stage of an organism that possesses alternation of generations in which haploid gametes are produced and unite during sexual reproduction to form a diploid (2n) zygote. gemma cup ( gemmae): A mass of vegetative tissue found in mosses, liverworts and some fungi that produces clonal offspring through asexual reproduction. haploid: Having on set of chromosomes (cf. diploid). heteromorphic: The condition of having different forms in the haploid (1n) and diploid (2n) stages of plants and other organisms possesing alternation of generations. heterosporous: In plants,possessing two types of haploid (1n) spores, i. e., megaspores that become female gametophytes and microspores that become male gametophytes. homosporous: Producing only one type of spore (cf. heterosporous).
The splitting of a heavy nucleus into two approximately equal parts, which are nuclei of lighter elements, accompanied by the release of energy and generally one or more neutrons. Fission can occur spontaneously or can be induced by nuclear bombardment.
splitting; or breaking into parts (ex. the 'cessation' of a human molecule).
The splitting of an atom into at least two other atoms and the release of a relatively large amount of energy. Two or three neutrons are usually released during this type of transformation.
The splitting of a heavy nucleus into two roughly equal parts (which are nuclei of lighter elements), accompanied by the release of a relatively large amount of energy in the form of kinetic energy of the two parts and in the form of emission of neutrons and gamma rays.
A release of energy caused by the splitting of an atom's nucleus. This is the energy process used in conventional nuclear power plants to make the heat needed to run steam electric turbines.
The process in which the nucleus of an atom splits into two (rarely three) large fragments of approximately equal mass with a large release of energy and in which neutrons and other radiations are emitted. The fission fragments are radioactive nuclei.
The splitting apart of a heavy atomic nucleus, into two or more parts when a neutron strikes the nucleus. The splitting releases a large amount of energy.
The splitting of an atom into two with the release of energy. It can be spontaneous in nature. It is the process used in nuclear reactors.
The splitting of a nucleus into two lighter fragments, accompanied by the release of energy and generally one or more neutrons. Fission can occur either spontaneously or as a consequence of absorption of a neutron.
Nuclear reaction in which a heavy nucleus is split apart to form two or more lighter nuclei, accompanied by the release of large amounts of energy and various forms of ionizing radiation.
To split into two portions or cells.
A process of splitting the heavy nucleus into two or more fission fragments.
The splitting of atoms, which results in the release of large amounts of energy. Fission occurs naturally or when an atom's nucleus is bombarded by neutrons.
The release of energy through splitting atoms.
The splitting of an atom into two or more new atoms. When a uranium atom splits in the reactor, two new atoms, neutrons and heat are produced.
Forcing the nucleus of an atom to break into two nuclei. Each of these nuclei is half the size of the original. Fission is a man-made process whereby neutrons are made to strike the nuclei of some heavy atoms. The nuclei produced are called fission fragments. Atom bombs work by splitting the atoms of uranium-235 or plutonium-239, into a chain reaction releasing enormous quantities of energy. The amount of radioactive material needed to produce a chain reaction is called the critical mass. In a bomb this process is maximized to yield a tremendous explosion. The bomb on Hiroshima utilized two pieces of uranium-235 forced together by an explosive device. For Nagasaki the bomb contained a hollow ball of plutonium-239. An explosive device crushed the plutonium into a solid mass to set-off the chain reaction.
In biology, binary fission is the asexual reproductive process used by prokaryotes. It begins when the DNA of the cell is duplicated. Each circular strand of DNA then attaches to the plasma membrane, which grows inwards and splits the cell into two daughter cells.
The splitting of an atom in two releasing energy; induced fission occurs when a free neutron collides with a nucleus causing it to split, unlike spontaneous fission which occurs without external influence
the disintegration of a heavy atomic nucleus into two or more lighter fragments. Nuclear energy is released in the process.
a nuclear reaction in which an atomic nucleus splits into fragments with the release of energy.
Division of single-celled organisms, especially prokaryotes, in which mitosis does not occur. Also used to refer to mitosis in certain unicellular fungi.
Fission is the term given to the process of "splitting" atoms through their bombardment by neutrons. The term was actually first coined by the physicist Otto Frisch (nephew of Lise Meitner). More Information Photograph
The breakup of a heavy atomic nucleus into two or more lighter ones.
A nuclear reaction where the nucleus of an atom, splits into fragments of similar mass, releasing several hundred million electron volts of energy. This is one of the most powerful energy sources.
the splitting of atoms into pieces
the nuclear process in which a heavy atom, such as uranium, splits into fragments.
nuclear fission. A nuclear reaction in which an atomic nucleus breaks into smaller nuclei of comparable mass, releasing a large amount of energy.
The splitting of a nucleus to produce radiation and smaller nuclei. Radioactivity
(also Nuclear fission) - A nuclear process in which the nuclei of a heavy atom (e.g., uranium is split by a neutron, releasing a large amount of energy and additional neutrons.
The breaking up of a heavy atom into two or more lighter atoms of about equal mass, with vast release of energy. (See Atom bomb)
The splitting of heavier atomic nuclei into lighter ones. In the case of heavy atoms (e.g., uranium, plutonium), this will release energy. Fission is how nuclear power plants produce energy. See also: Fusion.
The splitting of an atomic nucleus into roughly equal parts, often by a neutron. In a fission reaction, a neutron collides with fissile nuclide (e.g. U-235) and splits, releasing energy and new neutrons. Many of these neutrons may go on to collide with other fissile nuclei, setting up a nuclear chain reaction.
the splitting of the nucleus of a heavy atom into two smaller parts. Huge quantities of energy and two to three extra neutrons during fission.
A nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy.
The splitting apart of an atom’s nucleus, releasing a large amount of heat energy.
The splitting of a heavy nucleus into two, accompanied by the release of a relatively large amount of energy and usually one or more neutrons. It may be spontaneous but usually is due to a nucleus absorbing a neutron and thus becoming unstable.
Nuclear fission. A process in which a nucleus splits into two or more nuclei and energy is released. Frequently refers to the splitting of a nucleus of uranium-235 into two approximately equal parts by a thermal neutron with emission of other neutrons.
the process whereby the nucleus of a particular heavy element splits into (generally) two nuclei of lighter elements, with the release of substantial amounts of energy.
generation of energy by breaking apart a nucleus, either a U or Pu nucleus
As relates to biology, reproduction by cell division.
Nuclear fission is a reaction in which an atom's nucleus is broken apart, releasing a tremendous amount of energy. Nuclear fission is used in many power plants on Earth (and is used in atomic weapons). Nuclear fission is not an important reaction in the Sun (for nuclear fusion, the nuclear reaction that occurs in the Sun, click here).
Splitting apart. Dividing into two.
form of asexual division in some yeasts in which the cell elongates and then separates along a median wall formed between the two halves.
The splitting of an atomic nucleus resulting in the release of large amounts of energy.
is a nuclear reaction in which the nuclei of atoms split apart to produce energy. This is the process that creates heat in a nuclear power plant.
A nuclear process that releases energy when heavyweight atomic nuclei break down into lighter nuclei. Fission is the basis of the atomic bomb.
Cell division by cleavage (splitting) of the cell into two parts. ( 15)
A nuclear reaction involving the splitting of atoms.
The physical process in which atoms split into lighter elements. Generally, this process is accompanied by the production of heat and radiation.