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How the nucleus decays depends on the particular isotope. Some even decay in more than one way. One possibility is called alpha decay. In alpha decay, the nucleus emits an alpha particle (two protons and two neutrons). Another possibility is beta decay, in which one of the nucleons changes from a neutron to a proton or vice versa and the nucleus will throw out a beta particle. A beta particle can be either an electron or a positron. (To conserve lepton number, the nucleus also emits an electron antineutrino or an electron neutrino at the same time.) A third case is electron capture. In this, one of the inner electrons is absorbed by the nucleus, a proton changes to a neutron, and an electron neutrino is thrown off. Heavy nuclides can undergo spontaneous fission, in which the nucleus splits into two smaller daughter particles with mass numbers of roughly 90-100 and 130-140. Often some spare neutrons are also ejected at the same time. Cluster decay is yet another mode, which happens only for nuclei which also decay via alpha decay. It's similar to alpha decay except the emitted particle is not a helium-4 nucleus but a heavier element. It's distinguished from spontaneous fission by the fact in cluster decay, only certain nuclei are emitted and they're always well under 90 amu. Other rare decay modes are possible: proton emission, neutron emission, double proton emission, double beta decay, double electron capture, double positron emission, and electron capture with positron emission. Most of these names should be self-explanatory.
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Is it true that nuclear radiation comes from the decay of atomic nuclei?
Yes, the decay of unstable atomic nuclei is the source of nuclear radiation.
What very large nuclei tend to be unstable?
Nuclei with very large atomic numbers, such as those above Z=83, tend to be unstable due to the increasing electrostatic repulsion between protons. This can lead to spontaneous radioactive decay in the form of alpha decay, beta decay, or fission.
When does radioactivite decay occur?
Radioactive decay happens in an unstable isotope of a given element, as the isotope decays radiation is given off. As for when exactly, the decay of a nucleus is spontaneous and random so averages are used, these averages are different for different isotopes, but are measured as the "half life" (the time it takes for half the nucleus to decay).
What is the difference between a simulation and actual radioactive decay?
A simulation is a computer-generated model that mimics real-world processes, such as radioactive decay, using mathematical algorithms. Actual radioactive decay is a natural process where unstable atomic nuclei lose energy by emitting radiation. While simulations provide insight into how radioactive decay works, real decay occurs spontaneously and cannot be controlled or manipulated like in a simulation.
Is radioactive decay the same as organic decay?
No, radioactive decay is not the same as organic decay. The basic difference between radioactive decay and organic decay is that in organic decay, chemical compounds break down and the biochemical structure of the subject changes. This is a natural process that any biological structures will undergo, or it could be induced. In either case, it represents a chemical change. In radioactive decay, the actual atomic nuclei of atoms will break down in some way, depending on the substance being considered. It is the unstable atomic nucleus of given isotopes of elements that undergoes the change, and this is a nuclear or atomic change.
What is the process by which some substances spontaniously emit radiation?
The process by which some substances spontaneously emit radiation is called radioactive decay. During this process, unstable atomic nuclei release particles (such as alpha or beta particles) or electromagnetic radiation (such as gamma rays) to achieve a more stable configuration.
What is nuclei that has unstable decay known as?
Atomic nuclei that are unstable and decaying are said to be radioactive. Radioactive decay involves alpha, beta and gamma particle emissions.
Radioactivity is caused due to what?
spontaneous decay of unstable atomic nuclei.
What is the name of the process during which atomic nuclei decay?
D. Radioactivity
Process which unstable nuclei emit radiation is called?
This process through which unstable nuclei emit radiation is called radioactive decay. It also is called nuclear decay, and it is a natural process in which an atom of an isotope decomposes into a new element.
Is radioactive decay internal or external?
internal, it is a process occurring inside atomic nuclei.
Definition of gamma rays?
Penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei.
Is it true that nuclear radiation comes from the decay of atomic nuclei?
Yes, the decay of unstable atomic nuclei is the source of nuclear radiation.
Why does radioactive decay happen?
Radioactive decay happens because unstable atomic nuclei release energy in the form of radiation to become more stable.
What is the radioactive decay of an atom resulting in the decrease in the atomic number with no charge in the atomic mass called?
It is called beta decay. there are two types: 1) posive beta decay in which atomic number decreases. 2) negative beta decay in which atomic number increases.
What can stop alpha decay?
Alpha decay can be stopped by materials with sufficient thickness and density, such as a sheet of paper, a few centimeters of air, or a thin layer of plastic. This is because alpha particles, which are helium nuclei, have low penetration power and can be easily absorbed by relatively light materials. Additionally, increasing the distance from the source can also reduce exposure to alpha radiation. However, the fundamental process of alpha decay itself cannot be halted; it occurs spontaneously in unstable atomic nuclei.
What has the author Jerry Lewis Pietenpol written?
Jerry Lewis Pietenpol has written: 'Atomic corrections to electric-quadrupole gamma decay by heavy nuclei' -- subject(s): Gamma decay, Heavy nuclei, Spectrum analysis
