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.
Beta rays are more penetrating, and gamma rays are normally the most penetrating. To absorb neutrons you need material that has a lot of low mass nuclei. Lead is a terrible choice for stopping neutrons. Since neutrons don't directly ionize material, they only lose energy by bouncing off nuclei.