Characterization of a new ionization chamber in radiotherapy beams: Angular dependence and variation of response with distance

► The new ionization chamber was submitted to 60Co and radiotherapy X-rays beams. ► We examined the chamber response in two characterization tests. ► The chamber response variation with distance presented maximum variation of 11%. ► The angular dependence of this ionization chamber was within 1%. ► The results showed good agreement with the literature and international standards.