Practice for use of a ceric-cerous sulfate dosimetry system
|Publication Date:||15 June 2009|
|ICS Code (Radiation measurements):||17.240|
This practice covers the procedures for preparation, testing,
and using the ceric-cerous sulfate dosimetry system to determine
absorbed dose (in terms of absorbed dose to water) in materials
irradiated by photons (gamma radiation or
This practice describes both the spectrophotometric and the potentiometric readout procedures for the ceric-cerous system.
This practice applies provided the following conditions are satisfied:
The absorbed-dose range is between 0.5 and 50 kGy (1).2
The absorbed-dose rate is less than 106 Gy s−1(1).
For radionuclide gamma-ray sources, the initial photon energy is greater than 0.6 MeV. For bremsstrahlung photons, the energy of the electrons used to produce the bremsstrahlung photons is equal to or greater than 2 MeV. For electron beams, the initial electron energy is greater than 8 MeV.
NOTE 1-The lower energy limits are appropriate for a cylindrical dosimeter ampoule of 12-mm diameter. Corrections for dose gradients across an ampoule of that diameter or less are not required for photons, but may be required for electron beams (2). The ceric-cerous system may be used at lower energies by employing thinner (in the beam direction) dosimeters.
The irradiation temperature of the dosimeter is above 0°C and below 62°C (3).
NOTE 2-The temperature dependence of dosimeter response is known only in this range (see 4.3). Use outside this range requires determination of the temperature dependence.
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.
2 The boldface numbers in parentheses refer to the bibliography at the end of this standard.