Question

why alk electron have no same energy emitted from beta decay? give reason​

Answer 1

Explanation:

However, electron capture is more economical in energy than positron emission, its competitor. The creation of a positron requires 511 keV, the mass energy of the positron. If the energy released in the decay is smaller than 511 keV, the emission of a positron (beta-plus decay) is not allowed.