Write Selection Rules for Beta Decay.

ANSWER : Beta decay is a nuclear process in which an atomic nucleus undergoes a transformation, resulting in the emission of a beta particle. This decay occurs in two forms : beta-minus decay (β-) and beta-plus decay (β+). The selection rules for beta decay govern the conditions under which this process can occur. Here are the common selection rules for both types of beta decay :

1) Conservation of Total Lepton Number : The sum of the lepton numbers (electron, electron antineutrino for β- or positron, electron neutrino for β+) must be conserved.

2) Conservation of Electric Charge : The sum of the charges on the reactants must equal the sum of the charges on the products.

3) Conservation of Angular Momentum : The total angular momentum before and after the decay is conserved.

4) Conservation of Energy : The total energy before and after the decay is conserved.

5) Conservation of Parity : The intrinsic parity before and after the decay is the same.

In conclusion, the selection rules for beta decay dictate the conditions under which this nuclear process occurs. By adhering to these selection rules, beta decay processes ensure the preservation of fundamental physical quantities and symmetries.

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