1.6 What is the activity of 1 gm of 235U in [Ci] and in [Bq]? Do the same for 232Pu.

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1.7 What is the time required for 238U to decay by 1%?

1.8 The nuclide Po emits either an alpha particle or a beta particle with a half-life of 3.10 min.

a) Write equations for each reaction.

b) Calculate the decay constant for these reactions.

c) Determine the number of atoms in a sample if it has an activity of 100 μCi.

d) Calculate the activity after 1, and 2 half-lives in [Ci]

1.9 The reaction and decay equations for conversion of 232U to 232 Pu are shown below.

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232U + n → ²32U+Y

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232U233Np +_iß

233Np 23 Pu+_iß

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(Note the notation for ß decay in the equations.)

What is the total energy given off in these reactions? [MeV]