$\backslash (\backslash$mathrm$\{$A$\}^\{60\}\backslash$mathrm$\{$Co$\}\backslash )$ source with activity $15\mathrm{.}8$ Ci is embedded in a tumor that has a mass of $0\mathrm{.}525$ kg $.$ The Co source emits gamma$-$ray photons with average energy of $1\mathrm{.}25$ MeV. Half the photons are absorbed in the tumor, and half escape.

Part B

What absorbed dose $($in rad$)$ is delivered per second?

Express your answer in rads.

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D$=\backslash$quad $\backslash$mathrm$\{$rad$\}$

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Part C

What equivalent dose $($in rem$)$ is delivered per second if the RBE for these gamma rays is $0\mathrm{.}700?$

Express your answer in rem.

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D$=\backslash$mid $\backslash$quad $\backslash$text $\{$ rem $\}$

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Request Answer

Part D

What exposure time is required for an equivalent dose of $200$ rem?

Express your answer with the appropriate units.

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t$=\backslash$square

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