Calculadora de Defecto de Masa — Fórmula

Nuclear Mass Defect

The mass defect is the difference between the total mass of individual nucleons and the actual mass of the assembled nucleus.

Formula

delta_m = (Z × m_p + N × m_n) - M_atom

where m_p = 1.007276 u (proton), m_n = 1.008665 u (neutron), and M_atom is the measured atomic mass. The mass defect is converted to binding energy via E = delta_m × 931.494 MeV/u.

Ejemplo Resuelto

Fe-56: Z=26, N=30, measured mass = 55.9349 u.

  1. Expected mass = 26 × 1.007276 + 30 × 1.008665
  2. Expected = 26.1891 + 30.2600 = 56.4491 u
  3. Mass defect = 56.4491 - 55.9349 = 0.5142 u
  4. BE = 0.5142 × 931.494 = 479.1 MeV