title: Determination of C lambda for a graphite-walled reference ionization chamber.
abstract: A method of evaluation of chamber wall dependent components Am, Aeq and alpha of the absorbed dose conversion factor C lambda, for a graphite wall reference ion chamber is described in this paper. The procedure of utilising such a reference chamber for routine absorbed calibration of commercial dosemeters at high photon energies is also described.
mesh_terms: D006108:Graphite; D007477:Ions; D008433:Mathematics; D011879:Radiotherapy Dosage; D013679:Technology, Radiologic
chemical_list: D007477:Ions; D006108:Graphite