Source: wikibot/bonner-sphere
= Bonner sphere
{wiki=Bonner_sphere}
A Bonner sphere is a type of neutron detection and measurement device used in radiation physics. It consists of a sphere made of a hydrogenous material, such as polyethylene, that is surrounded by a layer of neutron moderator or shielding material, often containing boron or other neutron-absorbing substances. The primary purpose of the Bonner sphere is to measure neutron flux or dose rates in a radiation field.