SU-F-T-64: An Alternative Approach to Determining the Reference Air-Kerma Rate from Extrapolation Chamber Measurements

2016 ◽  
Vol 43 (6Part13) ◽  
pp. 3476-3476
Author(s):  
T Schneider
Keyword(s):  
Air Kerma ◽  
Alternative Approach ◽  
Extrapolation Chamber ◽  
Reference Air Kerma Rate ◽  
Chamber Measurements ◽  
Air Kerma Rate

Determination of the reference air kerma rate for Ir192 brachytherapy sources and the related uncertainty

2004 ◽  
Vol 31 (10) ◽  
pp. 2826-2833 ◽  
Author(s):  
Eduard van Dijk ◽  
Inger-Karine K. Kolkman-Deurloo ◽  
Patricia M. G. Damen
Keyword(s):  
Air Kerma ◽  
Reference Air Kerma Rate ◽  
Air Kerma Rate

Direct reference air-kerma rate calibration of192Ir for a thimble-type ionization chamber in a cylindrical solid phantom

Metrologia ◽  
2012 ◽  
Vol 49 (5) ◽  
pp. S241-S245 ◽  
Author(s):  
Theodor W Kaulich ◽  
Ulrich Quast ◽  
Michael Bamberg ◽  
Hans-Joachim Selbach
Keyword(s):  
Ionization Chamber ◽  
Direct Reference ◽  
Air Kerma ◽  
Cylindrical Solid ◽  
Reference Air Kerma Rate ◽  
Air Kerma Rate

ESTABLISHMENT OF A LOW DOSE RATE GAMMA RAY CALIBRATION FIELD FOR ENVIRONMENTAL RADIATION MONITORING DEVICES

2019 ◽  
Vol 187 (1) ◽  
pp. 61-68
Author(s):  
Munehiko Kowatari ◽  
Hiroshi Yoshitomi ◽  
Sho Nishino ◽  
Yoshihiko Tanimura ◽  
Tetsuya Ohishi ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Radiation Monitoring ◽  
Dose Equivalent ◽  
Environmental Radiation ◽  
Air Kerma ◽  
Ambient Dose Equivalent ◽  
Reference Air Kerma Rate ◽  
Monitoring Devices ◽  
Air Kerma Rate ◽  
Ambient Dose

Abstract For routine calibration of dosemeters used for environmental radiation monitoring, a low dose rate 137Cs gamma ray calibration field that fully satisfies the requirement of the ISO 4037 series was established in the Facility of Radiation Standards in Japan Atomic Energy Agency. Two different methods were employed to determine the reference air kerma rate, namely a conventional ionisation chamber and a G(E) function method used a newly developed scintillation spectrometer. To fulfil the requirement of the ISO 4037 and suppress scattering of Cs gamma ray within the room as far as possible, a suitable lead collimator was introduced to limit the irradiation area at test points and placed at the middle height in an irradiation room with a grating floor. From measured results of de-convoluted photon fluence spectrum and the variation of evaluated reference air kerma rates between 1.0 m and 3.0 m from the centre of the source, gamma ray scattering from the room structures was found to be negligible. The reference air kerma rate at distances between1.0 m and 3.0 m could be then interpolated by simply considering the inverse square law of the distance and air attenuation. The resulting Cs gamma ray calibration field could provide ambient dose equivalent rates of 0.7–7.2 μSv h−1 for use with environmental radiation monitoring devices. Finally, we attempted to calibrate a widely used NaI(Tl) scintillation survey metre, obtaining a quite satisfactory calibration factor. These results also imply that such survey metres can be employed to monitor affected areas and assess the progress of decontamination, as they can provide appropriate measurements of the ambient dose equivalent rate.

Assessment of the linear reference air kerma rate of192Ir wires

2001 ◽  
Vol 46 (8) ◽  
pp. 2201-2207 ◽  
Author(s):  
J Pérez-Calatayud ◽  
F Ballester ◽  
Y Limami ◽  
L A DeWerd ◽  
K Nelson
Keyword(s):  
Air Kerma ◽  
Reference Air Kerma Rate ◽  
Air Kerma Rate

3D printed brachytherapy jig for Reference Air Kerma Rate calibration

2021 ◽  
Author(s):  
Emily Simpson-Page ◽  
Lynsey Hamlett ◽  
Dominika Lew ◽  
Holly Stephens ◽  
Rachael Wilks ◽  
...  
Keyword(s):  
Air Kerma ◽  
3D Printed ◽  
Reference Air Kerma Rate ◽  
Air Kerma Rate
Sign in / Sign up

Export Citation Format

Share Document