The property of spontaneously emitting rays or subatomic particles of matter with the release of large amounts of energy.
Energy in the form of radiation emitted by a radioactive substance.
Emission of radiation (in the form of particles or waves) as a result of the disintegration (decay) of the nuclei of certain naturally occurring radioactive elements (e.g., uranium, radium) or of artificially produced radioactive isotopes.
The breaking down of atomic nuclei, causing release of alpha, beta, or gamma rays.
The spontaneous emission of radiation. Radioactivity is caused by the disintegration of the nuclei of atoms when they emit electromagnetic rays called X rays and gamma rays.
The property of certain atoms to change into more stable energy configurations by throwing off particle constituents of their nucleus or electromagnetic radiation, or both.
The spontaneous emission of radiation. Radioactivity is caused by the disintegration of the nuclei of atoms when they emit electromagnetic rays called X rays and gamma rays. There are three components present in the radiation of radioactivity: alpha particles, beta particles (which are electrons and penetrate 100 times more than alpha particles), and gamma rays (which penetrate much more than beta particles and consist of electromagnetic radiation of the same nature as X rays but of substantially greater energy). Radioactivity was discovered in 1896 by the French physicist Antoine Henri Becquerel as he was studying uranium. Around the same time, Marie Curie and Pierre Curie made further studies of radioactivity, measuring the heat associated with the decay of radium.
Disintegration of the nuclei of certain elements, with the emission of energy in the form of alpha, beta, or gamma rays. As particles are emitted the elements decay into other elements. Naturally radioactive elements include radium and uranium. There are many artificially produced isotopes, including iodine-131 and cobalt-60, which are used in radiotherapy.
Breakdown of the nuclei of some elements resulting in the emission of energy in the form of alpha, beta and gamma rays. Because of this particle emission, the elements decay into other elements. Radium and uranium are naturally occurring radioactive elements. Radiothrapy treatment utilises artificially produced isotopes (alternative forms of an element) such as iodine-131 and cobalt-60.
Spontaneous disintegration of an atomic nucleus resulting in the emission of alpha, beta, or gamma rays.
In the realm of nuclear physics, there exists a notable phenomenon referred to as radioactive decay. This process involves the spontaneous disintegration of specific atomic nuclei, a property inherent in elements such as radium, uranium, thorium, and their respective decay products. During this disintegration, particles in the form of alpha or beta particles, and at times gamma rays, are emitted from the atomic nuclei. This process is also commonly known as activity.
The release of alpha particles, beta particles, and/or gamma radiation transpires as a result of the spontaneous breakdown of the nuclei of unstable atoms.
Numerous radioactive materials, like uranium ores, exist naturally. Nevertheless, a significant portion of elements can acquire radioactivity through the process of bombarding them with high-energy particles, like neutrons.
A characteristic of specific substances where they release alpha, beta, or gamma rays spontaneously from the nucleus of the atom. This can occur naturally in substances like radium, or it can be artificially triggered by placing a material inside a thermonuclear reactor and subjecting it to high-velocity particle bombardment, resulting in the creation of radioactive isotopes.