Key terms: atom, electron, electron-neutrino, nucleus, neutron, positron, proton, radioactive decay What is the difference between positron emission and electron capture - comparison the main differences What are the similarities between positron emission and electron capture - overview of the common features 4. What is electron capture - definition, principle, example 3. What is positron emission - definition, principle, example 2. This is the main difference between positron emission and electron capture. In positron emission, a proton is converted into a neutron within the radioactive nucleus, while a positron is released In electron capture, a proton-rich nucleus of a neutral atom absorbs an inner shell electron, which then converts a proton into a neutron and emits an electron neutrino. Both processes take place in proton-rich nuclei. Electron capture is a process in which an electron neutrino is emitted. Positron emission is the release of a positron and an electron neutrino during radioactive decay. There are different decay paths such as positron emission, negatron emission and electron capture. Radioactive decay converts an isotope of one element into an isotope of another element. In order to become stable, these isotopes therefore go through a spontaneous process called radioactive decay. There are certain naturally occurring isotopes that are unstable due to the unbalanced number of protons and neutrons in their atomic nucleus.
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