67.下圖為24Na的能譜(energy spectrum),下列何者不存在其中? (A)photopeak (B)single escape annihilation peak (C)coincidence peak (D)double escape annihilation peak
以上引用自: https://books.google.com.tw/books?id=4LE_3lS5Nn8C&pg=PA315&lpg=PA315&dq=24Na%EF%BC%88energy+spectrum%EF%BC%89&source=bl&ots=E2-zx5z498&sig=ACfU3U3Lyg1OAuY1JLQ2Huf4ZGRmXvFWow&hl=zh-TW&sa=X&ved=2ahUKEwiqvJ_Ng4TjAhVHgLwKHQ07AiEQ6AEwDHoECAkQAQ#v=onepage&q=24Na%EF%BC%88energy%20spectrum%EF%BC%89&f=false
課本P66 一模一樣的圖
67.下圖為24Na的能譜(energy spectrum),下列何者不存在其中..-阿摩線上測驗