1.
Appl Radiat Isot
; 70(10): 2534-8, 2012 Oct.
Artigo
em Inglês
| MEDLINE
| ID: mdl-22885819
RESUMO
A new double faced ionization chamber was constructed at the Calibration Laboratory of IPEN. It has different collecting electrode materials: aluminum and graphite. It was irradiated in standard radiotherapy beams ((60)Co and X-rays). The response variation with distance and the angular dependence of this ionization chamber were evaluated. It was verified that the chamber response follows the inverse square law within a maximum variation of 11.2% in relation to the reference value. For the angular dependence it showed good agreement with international standards.