X-ray shielding Share: Copied! On this page: Energy: Select 15 15.20 15.50 15.86 20 30 40 50 60 70 80 88 89 100 125 150 200 250 300 keV Shielding material: Select lead glass lead concrete gypsum plastic thickness: mm Attenuation factor: Attenuation times: 1- For "drywall" use gypsum as material (gypsum thikness in drywall = 12.7 mm) 2- Build-up factors for X-rays between 100 keV and 300 keV were calculated using Trubey's table (lead and concrete only). 3- For X-rays below 100 keV the Trubey's build-up corresponding to 100 keV was used (lead and concrete only). Copyright © May 2011 University of Toronto Not to be reproduced without the written permission of the Office of Environmental Health and Safety 215 Huron Street, Toronto, Ontario, Canada M5S 1A2 Hector Rocca