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The decay energy is the energy released by a radioactive decay. Radioactive decay is the process in which an unstable atomic nucleus loses energy by emitting ionizing particles and radiation. This decay, or loss of energy, results in an atom of one type, called the parent nuclide transforming to an atom of a different type, called the daughter nuclide. ==Decay calculation== The energy difference of the reactants is often written as ''Q'': : or : Example: 60Co decays into 60Ni. The mass difference ''dm'' is 0.003u. The radiated energy is approximately 2.8 MeV. The molar weight is 59.93. The half life ''T'' of 5.27 year corresponds to the activity A=(N *(-ln(2)))/T, where N is the number of atoms per mol. Taking care of the units the radiation power for 60Co is 17.9 W/g Radiation power in ''W/g'' for several isotopes: : 60Co: 17.9 : 238Pu: 0.57 : 137Cs: 0.6 : 241Am: 0.1 : 210Po: 140 (T=136 d) : 90Sr: 0.9 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「decay energy」の詳細全文を読む スポンサード リンク
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