30.09 The isotope 204 Pb decays via alpha decay. The measured atomic mass of 204

Question

30.09 The isotope 204 Pb decays via alpha decay. The measured atomic mass of 204 Pb is 203.97304 u , and the daughter nucleus atomic mass is 199.96833 u . a. Identify the daughter nucleus by nucleon number. b. Calculate the kinetic energy of the alpha particle if we can ignore the recoil of the daughter nucleus. (in MeV) 30.09 The isotope 204 Pb decays via alpha decay. The measured atomic mass of 204 Pb is 203.97304 u , and the daughter nucleus atomic mass is 199.96833 u . a. Identify the daughter nucleus by nucleon number. b. Calculate the kinetic energy of the alpha particle if we can ignore the recoil of the daughter nucleus. (in MeV)

Explanation / Answer

204 Pb 82--------------->200 Hg 80 + 4 He 2

so daughter nuclues is mercury.

b. KE of 2 He4= 203.97304-199.96833)931.5 =3730.4 meV

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