About: http://webisa.webdatacommons.org/245526360

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Iridium 192 is presently preferred, other sources of radiation can be used, including X-rays, beams of neutrons, electrons or other charged particles, or ultraviolet light from sunlight or artificial sources.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com