Gamma Decay: 23994Pu 23994Pu +  Nucleus has energy levels

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Presentation transcript:

Gamma Decay: 23994Pu 23994Pu +  Nucleus has energy levels Energy of transition emitted as a high energy photon ( ≈ 5 - .05 nm) Usually after a beta or alpha decay Many energies possible Stopped by meters of lead Used for food irradiation

Gamma ray energies associated with alpha and beta decays – so Alpha and Gamma energies are discrete. (Like spectral lines we saw)

23994Pu --> 23994Pu +  239.052464 --> 239.052157 What is the energy of the gamma emitted? 0.2860 MeV

Tl-208 emits a 0.6210 MeV gamma and the neutral atom in the unexcited state has a mass of 207.9820047 u. What was the mass of the excited state before the gamma was emitted? 207.9826714 u

24596Cm --> 24596Cm +  245.0658034 u --> ??????? What is the mass of the daughter nucleus, if a 0.2957 MeV gamma photon is emitted? 245.065486 u