or antineutrino in the decay.. Examples of beta minus decay include the decay of \(^{14}C\) into \(^{14}N\) and it usually occurs in neutron rich nuclei. Due to the change in the nucleus a beta particle is emitted. Notes: The nuclide that decays is the one on the left-hand side of the equation. Alpha decay is a type of radioactive decay in which a particle with two neutrons and two protons is ejected from the nucleus of a radioactive atom. The type of radioactive decay is usually discernable from studying the products and reactants (the parent nucleus/atom, the daughter nucleus and the emitted or absorbed particles) of the radioactive decay. That positron is then very quickly annihilated by an electron, and this will emit two gamma rays that move in approximately opposite directions. 2) The order of the nuclides on the right-hand side can be in any order. 1 1 p → 0 1 n + +1 0 e. In positron decay mass number is conserved, however, number of protons decreases by one and number of neutrons increases by one. In this case, the mass number of daughter nucleus remains the same, … The β- decay of carbon-14.  These pairs can then be picked up with the machine and translated by the computer into an image. In this example, a neutron of carbon is converted into a proton and the emitted beta particle is an electron. 3) The way it is written above is the usual way. 2. An example of a positron decay equation: Some points to be made about the equation: 1) The nuclide that decays is the one on the left-hand side of the equation. Positron emission or beta plus decay (β + decay) is a subtype of radioactive decay called beta decay, in which a proton inside a radionuclide nucleus is converted into a neutron while releasing a positron and an electron neutrino (ν e). Positron emiss ion (\(β^+\) decay) is the emission of a positron from the nucleus. The fact that the above decay is a three-particle decay is an example of the conservation of lepton number; there must be one electron neutrino and one muon neutrino. Solution. Beta-Plus Decay: In beta plus decay, the proton disintegrates to yield a neutron causing a decrease in the atomic number of the radioactive sample. Muon. - alpha decay - beta decay - positron emission - electron capture. Positron Emission: An example of a positron emission (β + decay) is shown below. When the radioactive molecule undergoes decay, it emits a positron through beta decay. Uranium and thorium are examples of alpha decay. If a nucleus emits a beta particle, it loses an electron (or positron). In this case, the process can be represented by: An annihilation occurs, when a low-energy positron collides with a low-energy electron. The lifetime of the muon is 2.20 microseconds. Positive Beta Decay – Positron Decay. The order of the nuclides on the right-hand side can be in any order. Examples: 1. 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