Solved: (II) A 1.6-mCi source of emitter, is implanted in

Chapter 31, Problem 46P

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\(\text { (II) }\) A \(1.6-m C i\) source of \({ }_{15}^{32} \mathrm{P}\) (in \(\mathrm{NaHPO}_{4}\)), a \(\beta\) emitter, is implanted in a tumor where it is to administer \(32 \text { Gy }\). The half-life of \(\begin{array}{l}32 \\15\end{array} P\) is 14.3 days, and \(1.0 \mathrm{mCi}\) delivers about \(10 \mathrm{mGy} / \mathrm{min}\). Approximately how long should the source remain implanted?

Equation Transcription:

Text Transcription:

(II)

1.6-mCi

15^32P

NaHPO4

\beta

32 Gy

15^32P

1.0-mCi

10 mGy/min

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