Standard
[CURRENT]
ISO 4037-2:2019-01
Radiological protection - X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy - Part 2: Dosimetry for radiation protection over the energy ranges from 8 keV to 1,3 MeV and 4 MeV to 9 MeV
German title
Strahlenschutz - Röntgen- und Gamma-Referenzstrahlungsfelder zur Kalibrierung von Dosimetern und Dosisleistungsmessgeräten und zur Bestimmung ihres Ansprechvermögens als Funktion der Photonenenergie - Teil 2: Strahlenschutz-Dosimetrie in den Energiebereichen 8 keV bis 1,3 MeV und 4 MeV bis 9 MeV
Note
There is a corrected version for the English
language version. Publication date
2019-01
Original language
English
Pages
28
Note
There is a corrected version for the English
language version.
Publication date
2019-01
Original language
English
Pages
28
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Content
Content (en)
Foreword
Introduction
Scope
Normative references
Terms and definitions
Standard instrument
Show subsection Close subsection General
Calibration of the standard instrument
Energy dependence of the response of the standard instrument
Conversion from the measured quantity air kerma, K, to the required phantom related measuring quantity
Show subsection Close subsection General
Determination of conversion coefficients
Show subsection Close subsection General
Calculation of conversion coefficients from spectral fluence
Validation of reference fields and of listed conversion coefficients using dosimetry
Direct calibration of the reference field in terms of the required phantom related measuring quantity
Measurement procedures applicable to ionization chambers
Show subsection Close subsection Geometrical conditions
Chamber support and stem scatter
Location and orientation of the standard chamber
Measurement corrections
Show subsection Close subsection General
Corrections for air temperature, pressure and humidity variation from reference calibration conditions
Corrections for radiation-induced leakage, including ambient radiation
Incomplete ion collection
Beam non-uniformity
Additional procedures and precautions specific to gamma radiation dosimetry using radionuclide sources
Show subsection Close subsection Use of certified source output
Use of electron equilibrium caps
Radioactive source decay
Radionuclide impurities
Interpolation between calibration positions
Additional procedures and precautions specific to X-radiation dosimetry
Show subsection Close subsection Variation of X-radiation output
Monitor
Adjustment of air kerma rate
Dosimetry of reference radiation at photon energies between 4 MeV and 9 MeV
Show subsection Close subsection Dosimetric quantities
Measurement of the dosimetric quantities
Show subsection Close subsection General
Air kerma (rate)
Phantom related operational quantities H*(10), H(10), H'(3) and H(3)
Measurement geometry
Monitor
Determination of air kerma (rate) free-in-air
Show subsection Close subsection General
Measurement conditions
Show subsection Close subsection Choice and positioning of detector
Electron equilibrium
Direct measurement with an ionization chamber
Determination of air kerma (rate) from photon fluence (rate)
Show subsection Close subsection General
Determination of air kerma from photon fluence measurements
Uncertainty of measurement
Show subsection Close subsection General
Components of uncertainty
Show subsection Close subsection General
Uncertainties in the calibration of a secondary standard
Uncertainties in the measurements of the reference radiation due to the standard instrument and its use
Show subsection Close subsection Uncertainties determined by type A methods
Uncertainties determined by type B methods
Statement of uncertainty
Technical details of the instruments and their operation (normative)
Show subsection Close subsection General
Operational details of the standard instrument
Show subsection Close subsection General
Operation of the standard instrument
Stability check
Warm-up and response times
Zero-setting
Number of readings
Non-constant response value due to instrument scale and range
Shutter transit time
Procedures applicable to ionization chambers
Show subsection Close subsection General
Ionization chamber assembly calibrated separately from measuring assembly
Influence of the direction of radiation incidence on the response of the ionization chamber
Measurement of the effect of leakage
Measurement corrections
Show subsection Close subsection General
Zero shift
Corrections for electrical leakage
Measurement of photon spectra (informative)
Show subsection Close subsection Experimental set-up for the measurement of pulse height spectra
Unfolding of pulse height spectra to determine the spectral fluence
Bibliography
Cooperation at DIN
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