Beta Decay not a specific problem, just a question

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SUMMARY

Beta decay involves two types: beta plus decay, which emits a positron, and beta minus decay, which emits an electron. In calculating the kinetic energy of particles released during these decays, the mass of the electron is considered for beta plus decay but is effectively canceled out in beta minus decay calculations. This cancellation occurs due to the conservation of energy and momentum principles, where the mass of the emitted electron does not affect the total energy balance. Understanding this concept is crucial for accurate calculations in nuclear physics.

PREREQUISITES
  • Understanding of nuclear decay processes
  • Familiarity with conservation of energy and momentum
  • Basic knowledge of particle physics terminology
  • Ability to perform energy calculations in physics
NEXT STEPS
  • Study the principles of conservation of energy and momentum in particle physics
  • Learn about the differences between beta plus and beta minus decay
  • Explore detailed calculations of kinetic energy in nuclear reactions
  • Investigate the role of mass-energy equivalence in particle decay
USEFUL FOR

Students and professionals in physics, particularly those focusing on nuclear physics, particle physicists, and educators teaching concepts of beta decay and energy calculations.

erinec
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I understand that a beta plus decay emits positron and beta minus decay emits electron. For the calculation of kinetic energy of the particle released, you take into account the mass of electron for beta plus, but why is it that you DON'T take into account the mass of electron for beta minus? I kind of heard that the mass of electron cancels out for beta minus decay. I do not see how that happens. If you could show me how the mass of electron "cancels out" when calculating the kinetic energy released for beta minus decay, I would feel extremely grateful. Thank you for taking your time to read my question.
 
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erinec said:
I understand that a beta plus decay emits positron and beta minus decay emits electron. For the calculation of kinetic energy of the particle released, you take into account the mass of electron for beta plus, but why is it that you DON'T take into account the mass of electron for beta minus? I kind of heard that the mass of electron cancels out for beta minus decay. I do not see how that happens. If you could show me how the mass of electron "cancels out" when calculating the kinetic energy released for beta minus decay, I would feel extremely grateful. Thank you for taking your time to read my question.
Who doesn't take into account the mass of the electron?
 

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