ICSE Class 10 Answered
Decay of alpha beta gamma particles
Asked by aryankumarkeshri80 | 26 Jan, 2020, 07:41: PM
Expert Answer
Alpha particle is nucleus of Helium atom.
Hence if a nucleus emits alpha particle , its mass number decreases by 4 and atomic number decreases by 2.
Example :-
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Beta particles are two types, one is having negative charge that is written as β- which is similar
to electron in charge and mass.
Other one is positive charge that is written as β+ which has same mass as electron and
same magnitude of charge but sign of charge is positive
Example for β- decay :-
where is neutrino , particle having neutral charge and negligible mass
Example for β+ decay :-
where ν is anti-neutrino , particle having neutral charge and negligible mass
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Gamma ray is neutral beam which is electromagnetic radiation. when alpha or beta decay takes place,
the product nuclei is left in excited state, i.e., nucleus at higher energy level than ground state energy level and
comes to ground state by emitting gamma radiation that has energy equal to the difference of excited state energy
and ground state energy
Answered by Thiyagarajan K | 27 Jan, 2020, 08:30: AM
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