Method of deriving the response curve of an ionisation chamber from experimental values of its air kerma calibration coefficients measured in standardised X-ray beams

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652052%3A_____%2F25%3AN0000025" target="_blank" >RIV/86652052:_____/25:N0000025 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/abs/pii/S1350448725001179" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S1350448725001179</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.radmeas.2025.107488" target="_blank" >10.1016/j.radmeas.2025.107488</a>

Result language

angličtina

Original language name

Method of deriving the response curve of an ionisation chamber from experimental values of its air kerma calibration coefficients measured in standardised X-ray beams

Original language description

Air-equivalent ionisation chambers are the reference instruments for measuring air kerma in dosimetry calibration laboratories. The energy dependence of the response of a given ionisation chamber is usually characterised by a discrete set of values of its air kerma calibration coefficients, NK,a, measured in standardised photon beams. For photon energies below 300 keV, the most commonly used standardised calibration beams are the X-ray beams, i.e. beams with continuous spectra. The energy dependence of a given ionisation chamber could alternatively be characterised by the response function fIK(E) which describes the dependence of the magnitude of the electrical response of the chamber on the photon energy, E, at a constant air kerma rate. In practice, this method of characterising the energy dependence of the ionisation chamber response is rarely used because monoenergetic calibration photon beams covering the above mentioned energy range are not routinely available and it is therefore difficult to measure the response function fIK(E) experimentally. In this work, we show that: a) the response function fIK(E) of a given ionisation chamber can be derived from the values of its air kerma calibration coefficients, NK,a, measured in standardised X-ray calibration beams; b) the proposed method can reveal possible internal inconsistencies in the set of air kerma calibration coefficients, NK,a, of an ionisation chamber; c) the response function fIK(E) of a given ionisation chamber derived from a set of its NK,a values can be used to predict the NK,a values of the chamber for other X-ray beams.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10304 - Nuclear physics

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Radiation Measurements

ISSN

1350-4487

e-ISSN

1879-0925

Volume of the periodical

187

Issue of the periodical within the volume

September

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

107488

UT code for WoS article

001539846500001

EID of the result in the Scopus database

2-s2.0-105011164692