Primary X-rays

...When a substance is irradiated with X-rays, fluorescent X-rays (characteristic X-rays) with wavelengths specific to the elements in the substance are emitted, and this is an elemental analysis method in which qualitative analysis of the elements in the substance is performed based on the wavelengths, and quantitative analysis is performed based on the intensity of the fluorescent X-rays of each element. The X-rays irradiated to the substance are called primary X-rays, and are usually obtained from an X-ray tube. When monochromatic X-rays (X-rays consisting of only one wavelength) are used as the primary X-rays, only characteristic X-rays with wavelengths longer than that are emitted. ...

*Some of the terminology that refers to "primary X-rays" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…物質にX線を照射するとその物質中の元素に特有の波長の蛍光X線(固有X線)が放射されるので，その波長によって物質中の元素の定性分析を，また各元素の蛍光X線の強度から定量分析を行う元素分析法。物質に照射するX線は一次X線といい，通常はX線管球から得る。一次X線として単色X線(一つの波長のみから成るX線)を用いる場合は，その波長より長波長の固有X線しか出ない。…

※「一次 Ｘ 線」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報