What is beta decay by electron capture?
Electron capture is sometimes included as a type of beta decay, because the basic nuclear process, mediated by the weak force, is the same. In nuclear physics, beta decay is a type of radioactive decay in which a beta ray (fast energetic electron or positron) and a neutrino are emitted from an atomic nucleus.
What is the symbol for electron capture decay?
The first discovered was “ordinary” beta decay and is called β− decay or electron emission. The symbol β− represents an electron emitted in nuclear beta decay.
Is electron capture beta plus decay?
Electron capture is a competing (simultaneous) decay process for all nuclei that can undergo β+ decay. The converse, however, is not true: electron capture is the only type of decay that is allowed in proton-rich nuclides that do not have sufficient energy to emit a positron and neutrino.
What is the correct symbol for the electron in beta decay?
A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay.
What is the symbol for antineutrino?
The antineutrino (or anti-neutrino) is a lepton, an antimatter particle, the counterpart to the neutrino. Actually, there are three distinct antineutrinos, called types, or flavors: electron antineutrino (symbol ̅νe), muon antineutrino (symbol ̅νμ), and tau antineutrino (symbol ̅ντ).
What is the symbol for a positron?
Summary of Nuclear Radiation
| Type | Symbol | Charge |
|---|---|---|
| Beta particle | e−01 or β | 1− |
| Positron | e01 or β+ | 1+ |
| Gamma ray | γ or 00γ | 0 |
| Neutron | n10 | 0 |
What is the nuclear equation for electron capture?
The nuclear reaction depicting electron capture decay is: X + e- –> z-1Y + ve. The electron on the left side of the equation is usually absorbed from the K or L shell of the parent nucleus. Note the reduction in atomic number but conservation of mass number in the daughter nucleus.
What is positron and neutrino?
Positron and Neutrino The emission of a positron or an electron is referred to as beta decay. The positron is accompanied by a neutrino, an almost massless and chargeless particle. Positrons are emitted with the same kind of energy spectrum as electrons in negative beta decay because of the emission of the neutrino.
What are the products of beta plus decay?
During the 1930s new types of radioactivity were found among the artificial products of nuclear reactions: beta-plus decay, or positron emission, and electron capture. In beta-plus decay an energetic positron is created and emitted, along with a neutrino, and the nucleus transforms to…
Which is a positive particle in beta decay?
In positron emission, also called positive beta decay (β+ -decay), a proton in the parent nucleus decays into a neutron that remains in the daughter nucleus, and the nucleus emits a neutrino and a positron, which is a positive particle like an ordinary electron in mass but…
What happens to a neutron in beta minus decay?
Beta-Minus Decay: In beta minus, a neutron is transformed to yield a proton causing an increase in the atomic number of the atom. The neutron is neutral but the proton is positive. To maintain conservation of charge, the nucleus in the process also produces an electron and an antineutrino.
What kind of quantum number does beta decay conserve?
Beta decay conserves a quantum number known as the lepton number, or the number of electrons and their associated neutrinos (other leptons are the muon and tau particles).