1.1 This is a practice for using a cellulose triacetate (CTA)
dosimetry system to measure absorbed dose in materials
irradiated by photons or electrons in terms of absorbed dose to
water. The CTA dosimetry system is classified as a routine
dosimetry system.
1.2 The CTA dosimeter is classified as a type II dosimeter
on the basis of the complex effect of influence quantities on its
response (see ASTM Practice E2628).
1.3 This document is one of a set of standards that provides
recommendations for properly implementing dosimetry in
radiation processing, and describes a means of achieving
compliance with the requirements of ASTM E2628 “Practice
for Dosimetry in Radiation Processing” for a CTA dosimetry
system. It is intended to be read in conjunction with ASTM
E2628.
1.4 This practice covers the use of CTA dosimetry systems
under the following conditions:
1.4.1 The absorbed dose range is 10 kGy to 300 kGy.
1.4.2 The absorbed-dose rate range is 3 Gy/s to 431010
Gy/s (1).2
1.4.3 The photon energy range is 0.1 to 50 MeV.
1.4.4 The electron energy range is 0.2 to 50 MeV.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate
safety and health practices and determine the applicability
of regulatory limitations prior to use.