ASTM E1205-99 - 10.6.1999
 
1. Scope

1.1 This practice covers the preparation, testing, and procedure for using the ceric-cerous sulfate dosimetry system to measure absorbed dose in water when exposed to ionizing radiation. For simplicity, the system will be referred to as the ceric-cerous system. It is classified as a reference standard dosimetry system (see Guide E1261).

1.2 This practice describes both the spectrophotometric and the potentiometric readout procedures for the cericcerous systems.

1.3 This practice applies only to [gamma] rays, X-rays, and high energy electrons.

1.4 This practice applies provided the following are satisfied:

1.4.1 The absorbed-dose range shall be between 5 X 10 and 5 X 10 Gy (1).

1.4.2 The absorbed-dose rate shall be less than 10 Gy/s (1).

1.4.3 For radionuclide gamma-ray sources, the initial photon energy shall be greater than 0.6 MeV. For bremsstrahlung photons, the initial energy of the electrons used to produce the bremsstrahlung photons shall be equal to or greater than 2 MeV. For electron beams, the initial electron energy shall be 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. The ceric-cerous system may be used at lower energies by employing thinner (in the beam direction) dosimeter containers (see ICRU Report 35).

1.4.4 The irradiation temperature of the dosimeter should be between 0 and 62°C.

1.5 This standard does not purport to address all of the safety problems, 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. Referenced Documents

E170-23

Standard Terminology Relating to Radiation Measurements and Dosimetry

C912-17(2022)

Standard Practice for Designing a Process for Cleaning Technical Glasses

ICRU Report 60

Radiation Quantities and Units for Ionizing Radiation

ICRU Report 37

Stopping Powers for Electrons and Positrons

E668-20

Standard Practice for Application of Thermoluminescence-Dosimetry (TLD) Systems for Determining Absorbed Dose in Radiation-Hardness Testing of Electronic Devices

E958-13(2021)

Standard Practice for Estimation of the Spectral Bandwidth of Ultraviolet-Visible Spectrophotometers

E925-09(2022)

Standard Practice for Monitoring the Calibration of Ultraviolet-Visible Spectrophotometers whose Spectral Bandwidth does not Exceed 2 nm

ICRU Report 34

The Dosimetry of Pulsed Radiation

ICRU Report 14

Radiation Dosimetry: X-Rays and Gamma Rays with Maximum Photon Energies Between 0.6 and 60 MeV

51707-15

Standard Guide for Estimation of Measurement Uncertainty in Dosimetry for Radiation Processing

51400

Practice for Characterization and Performance of a High-Dose Radiation Dosimetry Calibration Laboratory

ICRU Report 35

Radiation Dosimetry: Electrons with Initial Energies Between 1 and 50 MeV

E178-21

Standard Practice for Dealing With Outlying Observations

51261-13(2020)

Standard Practice for Calibration of Routine Dosimetry Systems for Radiation Processing

E666-21

Standard Practice for Calculating Absorbed Dose From Gamma or X Radiation

E275-08(2022)

Standard Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers