Page 51 - 00. Complete Version - Progress Report IPEN 2014-2016

Application of Ionizing Radiations | Progress Report 51

Figure 6. MCz and Epitaxial
silicon diodes on a ceramic
base and the PMMA probes.
Dosimetry Systems

Industrial Dosimetry in Radiation Processing

Reliable absorbed-dose measurements traceable to rec-
ognized national and international dosimetry standards
play an important role in radiation processing. In all elec-
tron and gamma radiation processes dosimetry, it is re-
quired as a necessary quality control, to establish the
process and for research and development studies. The
Industrial Dosimetry Laboratory (IDL) is in charge of a
wide range of dosimetry activities covering the conven-
tional scope of radiation processing applications and the
development of new products and services. The dosime-
try procedures are carried out in agreement with the In-
ternational Organization for Standardization (ISO) and
American Society Testing and Materials (ASTM) standard
guides and practices. To establish reliable dosimetry sys-
tems, the IDL has participated of the intercomparisons of
gamma dose measurements, organized by Internation-
al Dose Assurance Service (IDAS) offered by the Interna-
tional Agency Energy Atomic (IAEA). Fricke solution has
been used as reference standard and alanine as trans-
fer standard dosimeters. Absorbed-dose measurements
in the products are carried out using polymethylmetac-
rylate (PMMA) as a routine dosimetry system provided
by Harwell Dosimeters Ltd. - UK, certified by the Interna-
tional Dose Assurance Service (IDAS) of the International
Atomic Energy Agency (IAEA) and the alanine dosimetry
system to increase the functional dose range. Addition-
ally, the radiochromic thin film FWT-60 and the Cellulose
Triacetate Film – CTA dosimeters are available for specif-
ic applications.