1mass noun Sweets; confectionery. as modifier âa candy barâ. count noun âpink and yellow candiesâ. âUnlike refined sugars found in candy and desserts, these simple sugars bring energy in a nutritious way.â. âSimple sugars such as candy and sodas will give you a quick energy high and then drop you flat in mood and strength.â. âI answer through a mouthful of chocolate candies.â.
Positrons are the same in the sense that they don't penetrate far into the skin, but when they collide with a particle in your body, gamma rays are generated by matter-antimatter annihilation. And gamma rays are very bad for you, indeed, as they have both high energy and can easily pass through your tissues.
Positron-emission tomography (PET) is a nuclear medicine functional imaging technique that is used to observe metabolic processes in the body as an aid to the diagnosis of disease. The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide , which is introduced into the body on a biologically active molecule.