the unstable nucleus of an atom
The Nobel Prize in Physics 1939 was awarded to Ernest Lawrence for the invention and development of the cyclotron and for results obtained with it, especially with regard to artificial radioactive elements.
The Nobel Prize in Physics 1938 was awarded to Enrico Fermi for his demonstrations of the existence of new radioactive elements produced by neutron irradiation, and for his related discovery of nuclear reactions brought about by slow neutrons.
radioactive decay
Over 99.999% of argon is not radioactive. A trace of radioactive argon-39 can be found in nature, but it is not significant. Synthetic radioactive isotopes of argon exist, as they do for all elements.
Physics. Indeed, he won the Nobel Prize in physics -- but not for relativity.Math and Physics
impossible & inexplicable. in classical physics radioactivity simply can't happen.
Transuranium elements are radioactive and unstable; the stability of a nucleus is a problem of nucleon physics.
The process of radioactive decay actually falls under the study of nuclear chemistry rather than physics or a combination of the two.
Radioactive decay falls under chemistry, because the chemical properties of the substance are changed during radioactive decay.
In physics, an alpha emitter is a radioactive substance which decays by emitting alpha particles.
The thermal energy is minimal compared to nuclear energy; and the radioactive decay is not a thermodynamic process - it is nuclear physics process.
The Nobel Prize in Physics 1939 was awarded to Ernest Lawrence for the invention and development of the cyclotron and for results obtained with it, especially with regard to artificial radioactive elements.
Veluppillai Elaguppillai has written: 'The investigation of Ca-Sr metabolism using radioactive tracer techniques' -- subject(s): Radioactive tracers in physiology, Strontium metabolism, Physics Theses, Calcium, Metabolism, Bone
The definition of 'emanation' refers to something that issues from a source. In physics and chemistry, emanation refers to the gaseous production of radioactive decay such as radon.
This all depends on the situation and context. In particle physics, proton decay is hypothetical. It is a type of radioactive decay where protons decay into lighter subatomic particles.
The Nobel Prize in Physics 1938 was awarded to Enrico Fermi for his demonstrations of the existence of new radioactive elements produced by neutron irradiation, and for his related discovery of nuclear reactions brought about by slow neutrons.
Nuclear radiations generally come from radioactive substance those radioactive substance may be present at any where in space. Sun also has such radioactive substances which gives raises to fusion reaction in it. So nuclear radiation may be from any part of the space it may be from the nearby planet or from star, etc,.