out-and- back selection 中文意思是什麼
out-and- back selection
解釋
提貨法-
Do some necessary calculations and decide on the general scheme of compton back - scattering imaging scanner to the real wall inspection. include the selection of radioactive source, the calculation of compton back - scattering beam, the calculation of the basic condition of finding out the different materials and the determination of some important parameters as well. 3
其主要內容包括入射源的選擇,散射粒子的理論計算,發現異物的最低條件計算以及系統的一些重要參數的確定,主要包括:放射源的選擇,散射角的確定,后準直器的形狀與尺寸,前準直器的尺寸,前準直孔的大小,檢測器的種類與型號,檢測器的效率等。
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