https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/3322287Edit ImageSaveSaveEditCropCustom TextProton with 300 GeV energy producing 26 charged particles in the 30 inch hydrogen bubble chamber at FERMILAB, c.1973. Original public domain image from FlickrMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseJPEGLarge 3200 x 2255 px | 300 dpiFree DownloadProton with 300 GeV energy producing 26 charged particles in the 30 inch hydrogen bubble chamber at FERMILAB, c.1973. Original public domain image from FlickrMore