Nuclear transmutation defined

Tritium was first prepared by nuclear transmutation, defined as the conversion of one element into another by a nuclear process. Rutherford, in addition to all his other contributions to chemistry and physics, was the first to carry out the alchemists dream. In 1919 Rutherford was still working with his alpha particles, this time shooting them into various gases. When he used nitrogen gas, the results indicated... 

A nuclear reaction involves the rearrangement of subatomic particles within the nucleus of an atom and the exchange or release of energy from within the nucleus. And since any particular element is defined by the number of protons and neutrons in its nucleus, a change in the number of either of these basic particles means the transmutation of the element into a different isotope or into an entirely different element. 

Define transmutation. Are all nuclear reactions also transmutation reactions Explain. 

A minimum time necessary for manufacturing a nuclear explosive device has been defined according to the material category, its irradiation status and suitability for conversion into components of nuclear explosive devices. Direct use material (such as Pu containing less than 80% Pu, HEU and can be used without transmutation or finther enrichment. 

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