A beta particle is typically a high speed electron in β- decay or positron (an electron with a positive charge) in β+ decay. Uranium and thorium are examples of alpha decay. 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. In this example, a neutron of carbon is converted into a proton and the emitted beta particle is an electron. 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. If a nucleus emits a beta particle, it loses an electron (or positron). The lifetime of the muon is 2.20 microseconds. Notes: The nuclide that decays is the one on the left-hand side of the equation. Solution. Positron decay is conversion of one proton to one neutron. That positron is then very quickly annihilated by an electron, and this will emit two gamma rays that move in approximately opposite directions. 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. In positron decay, a proton-rich nucleus emits a positron (positrons are antiparticles of electrons, and have the same mass as electrons but positive electric charge), and thereby reduces the nuclear charge by one unit. Examples of beta minus decay include the decay of \(^{14}C\) into \(^{14}N\) and it usually occurs in neutron rich nuclei. In this case, the mass number of daughter nucleus remains the same, … 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. The order of the nuclides on the right-hand side can be in any order. In this case, the process can be represented by: An annihilation occurs, when a low-energy positron collides with a low-energy electron. The β- decay of carbon-14. Positive Beta Decay – Positron Decay. Examples: 1. When the radioactive molecule undergoes decay, it emits a positron through beta decay. 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. The nucleus experiences a loss of proton but gains a neutron. 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. - alpha decay - beta decay - positron emission - electron capture. 2. Positron Emission: An example of a positron emission (β + decay) is shown below. Muon. or antineutrino in the decay.. 2) The order of the nuclides on the right-hand side can be in any order. 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