Home Contents Glossary Search Help

The Bonner sphere
Up Next


  • The biological damage caused by differing types of radiation varies according to the rate of energy deposited in the body. It is useful in a health physics instrument if its response takes into account the biological affect of the radiation.
  • Bonner et al took spheres of polyethylene with a small LiI scintillator at their centre and looked at the energy dependence as a function of the diameter of the sphere.
  • In any field of neutrons there will be a range of energies present, thus the problem is to devise an interaction by appropriate value of Q.

Dose(Sv) = Absorbed dose (Gy) x Q



The University of Liverpool
1999, 2000 The University of Liverpool, Department of Physics

EPSRCProject funded by The Engineering and Physical Sciences Research Council

Materials Teaching Educational ResourcesWebsite developed and maintained by the MATTER Project