编辑“︁X射线”︁（章节）

=== 硬X射线、软X射线、伽马射线 ===
波长短于0.2-0.1[[纳米|nm]]的叫做硬X射线，波长略大者被称作软X射线<ref name="Attwood">{{Cite book |author= Attwood, David |title= Soft X-rays and extreme ultraviolet radiation |publisher= Cambridge University |year= 1999 |isbn= 978-0-521-65214-8 |url= http://ast.coe.berkeley.edu/sxreuv/ |page= 2 |access-date= 2012-11-04 |archive-url= https://web.archive.org/web/20121111141255/http://ast.coe.berkeley.edu/sxreuv/ |archive-date= 2012-11-11 |df=  |dead-url= yes }}</ref>。硬X射线与[[伽马射线]]中波长較长的部分有重叠范围，二者的区别在于辐射源，而不是波长：X射线[[光子]]产生于高能[[电子]]加速，伽马射线则来源于[[原子核]]衰变。