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What is α-decay? What type of energy spectrum do α-particles have?

Answer»

α-particle is the nucleus of helium which is double ionized particle.
ZXA → Z – 2YA – 4 + 2He4
Example : 92U238 → 90Th234 + 2He4
It is clear that the emission of α-particle reduces the atomic number of the original nucleus from two and the mass number is 4 that means the atomic number of the product nucleus decreases by 2 and the mass number is four, it is called α-decay.

Exposure from the nucleus of α-particles can be interpreted on the basis of quantum mechanics rather than coherent principles. According to that α-particle occurs only in the nucleus and by the tunnel effect it comes out of then nucleus. The spectrum of energy of α-particles is discrete and linear discrete energy spectrum demonstrates that nuclear power level is available in the nucleus as well as nuclear.



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