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Development and Characterization of a New Cylindrical Ionization Chamber for Dosimetry of ^{60}{\rm Co} Beams

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3 Author(s)
Neves, L.P. ; Inst. de Pesquisas Energeticas e Nucl., Comissao Nac. de Energia Nucl., Sao Paulo, Brazil ; Perini, A.P. ; Caldas, L.V.E.

A cavity ionization chamber, made of PVC coated with graphite, was developed and tested to verify its applicability as a reference dosimeter for 60Co beams. In order to characterize this new ionization chamber, several tests were made, following international recommendations, as saturation, ion collection efficiency, polarity effect, short- and medium-term stabilities, linearity of response, angular dependence and leakage current. All results obtained were within those recommended internationally, showing that this prototype may be used as a dosimetric standard system at the Calibration Laboratory of IPEN.

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Nuclear Science, IEEE Transactions on  (Volume:60 ,  Issue: 2 )