核裂变能量计算器 — 公式

Nuclear Fission Energy

Fission releases energy because the products have higher binding energy per nucleon than the parent nucleus. The energy comes from the mass difference between reactants and products.

Formula

E = delta_m × 931.494 MeV/u

A typical U-235 fission releases about 200 MeV, which is roughly 80 million times more energy per reaction than a typical chemical reaction (~2.5 eV for TNT).

计算示例

U-236 fissions: total reactant mass 236.0526 u, total product mass 235.8295 u.

  1. delta_m = 236.0526 - 235.8295 = 0.2231 u
  2. E = 0.2231 × 931.494 = 207.8 MeV
  3. E = 207.8 × 1.602 × 10⁻¹³ = 3.33 × 10⁻¹¹ J per fission