Search results
Results From The WOW.Com Content Network
Positron emission, or beta plus decay, is a type of radioactive decay in which a proton in a nucleus is converted into a neutron and a positron. The equation for positron emission is shown for carbon-11 decaying into boron-11, and the energy conservation and application of this decay are explained.
Beta decay is a radioactive process in which an atomic nucleus emits an electron or a positron and a neutrino, changing its composition and properties. Learn about the two types of beta decay, beta minus and beta plus, how they are mediated by the weak force, and how they were discovered and studied by scientists.
A beta particle is a high-energy electron or positron emitted by radioactive decay of an atomic nucleus. Learn about the two forms of beta decay, the interaction of beta particles with matter, and the detection and measurement of beta radiation.
PET is a functional imaging technique that uses radioactive substances to visualize and measure metabolic processes and other physiological activities in the body. PET scans can be used for various purposes, such as detecting cancer, brain diseases, and drug development.
Learn about double beta decay, a rare type of radioactive decay in which two electrons or positrons are emitted from an atomic nucleus. Find out the history, types, and observed isotopes of double beta decay, and the difference between ordinary and neutrinoless double beta decay.
Radiation is the emission or transmission of energy in the form of waves or particles through space or a material medium. Learn about the different types of radiation, such as ionizing and non-ionizing, their effects on living organisms, and their applications in medicine, research and construction.
The decay scheme of a radioactive substance is a graphical presentation of all the transitions occurring in a decay, and of their relationships. Examples are shown below. It is useful to think of the decay scheme as placed in a coordinate system, where the vertical axis is energy, increasing from bottom to top, and the horizontal axis is the proton number, increasing from left to right.
A common example of an unstable nuclide is carbon-14 that decays by beta decay into nitrogen-14 with a half-life of about 5,730 years: 14 6 C → 14 7 N + e − + ν e. In this form of decay, the original element becomes a new chemical element in a process known as nuclear transmutation and a beta particle and an electron antineutrino are emitted.