73.下圖是99mTc射源在碘化鈉晶體之能譜(energy spectrum)分布圖,該能峰(peak)在112 keV代表什麼事 件?
(A)iodine escape peak
(B)backscatter peak
(C)coincidence peak
(D)lead X-ray peak
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統計: A(1345), B(323), C(111), D(31), E(0) #1383759
統計: A(1345), B(323), C(111), D(31), E(0) #1383759