Copied on 22 Jan 14 from

This figure has been modified to remove volatile sources disallowed as references in PH241. Below is the Creative Commons release of copyright holder Randall Monroe.


I waive all copyright to this chart and place it in the public domain, so you are free to reuse it anywhere with no permission necessary. (However, keep in mind that I am not a radiation expert, and this chart is intended for general public informational use only.)