Back to Search
Start Over
A standard for absorbed dose rate to water in a 60Co field using a graphite calorimeter at the National Metrology Institute of Japan.
- Source :
-
Radiation protection dosimetry [Radiat Prot Dosimetry] 2013; Vol. 154 (3), pp. 331-9. Date of Electronic Publication: 2012 Sep 05. - Publication Year :
- 2013
-
Abstract
- A primary standard for the absorbed dose rate to water in a ⁶⁰Co radiation field has been newly established at the National Metrology Institute of Japan. This primary standard combines the calorimetric measurements using a graphite calorimeter with the ionometric measurements using a thick-walled graphite cavity ionisation chamber. The calorimeter is operated in the constant temperature mode using AC Wheatstone bridges. The absorbed dose rate to water was determined to be 12 mGy s⁻¹ at a point of 1 m from the radiation source and at a water depth of 5 g cm⁻². The uncertainty on the calibration coefficient in terms of the absorbed dose to water of an ionisation chamber using this standard was estimated to be 0.39 % (k=1).
- Subjects :
- Cobalt Radioisotopes standards
Japan
Radiation Dosage
Reference Standards
Reproducibility of Results
Sensitivity and Specificity
Water standards
Calorimetry instrumentation
Calorimetry standards
Cobalt Radioisotopes analysis
Graphite radiation effects
Radiometry instrumentation
Radiometry standards
Water chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1742-3406
- Volume :
- 154
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Radiation protection dosimetry
- Publication Type :
- Academic Journal
- Accession number :
- 22951998
- Full Text :
- https://doi.org/10.1093/rpd/ncs235