The performance of the INER improved free-air ionization chamber in the comparison of air kerma calibration coefficients for medium-energy X-rays

Lee, Jeng-Hung; Kotler, L H; Büermann, L; Hwang, Wen-Song; Chiu, Jih-Hung; Wang, Chu‐Fang

doi:10.1016/j.radmeas.2004.03.033

Cited by 11 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The 60 Co source, 137 Cs source and Pantak HF 420 X-ray unit (Su et al, 2003;Lee et al, 2005) were established at INER to irradiate the RPLGDs and TLDs in the dosemeter energy-dependence study. This study set seven points within the energy range of 32-1250 keV.…”

Section: Dosimetry Characteristics Of Rplgds and Tldsmentioning

confidence: 99%

Dosimertry characteristics and performance comparisons: Environmental radiophotoluminescent glass dosemeters versus thermoluminescent dosemeters

Lee

Lin

Hsu

et al. 2009

Radiation Measurements

View full text Add to dashboard Cite

Section: Dosimetry Characteristics Of Rplgds and Tldsmentioning

confidence: 99%

Dosimertry characteristics and performance comparisons: Environmental radiophotoluminescent glass dosemeters versus thermoluminescent dosemeters

Lee

Lin

Hsu

et al. 2009

Radiation Measurements

View full text Add to dashboard Cite

“…During the measurement, photon attenuation and scattering in air and other media around the ionization chamber affect the measurement value [13]. For this reason, it is necessary to correct the photon attenuation and scattering [14][15][16][17][18][19]. Correction factors of photon attenuation and scattering for various types of 125 I brachytherapy sources were determined and analyzed in this paper.…”

Section: Introductionmentioning

confidence: 99%

Corrections for photons attenuation and scattering for the extrapolation chamber for measurement of air-kerma strength of ¹²⁵I brachytherapy source

Liu¹,

Song²,

Liu³

et al. 2021

J. Inst.

View full text Add to dashboard Cite

A type of extrapolation chamber was designed in China Institute of Atomic Energy, CIAE. The chamber was used for the measurement of the air-kerma strength of the medical radiation 125I source on primary standard level. In order to obtain the air-krema strength with a low uncertainty, some correction factors such as photon attenuation and scattering are needed to calculate. Correction factors for different types of 125I seeds were estimated with increasing chamber depth. Based on the relation between ionization current and average photon fluence, attenuation correction factors were calculated with the analytical solution. Additionally, the scattering correction factors were estimated by a suitable method of Monte Carlo simulation. Photon attenuation includes four components. katt-volume, katt-foil, katt-sf, and katt-Al. The differences of correction factors are concerned, mainly due to the variation of chamer depths and 125I seed types. katt-volume increases from 1.001 to 1.005. katt-foil varies between 1.0012 and 1.0014. katt-sf changes from 1.015 to 1.018. katt-Al varies between 1.038 and 1.048, which largely depend on the photon spectrum from the source. Meanwhile, the geometric dimension of the ionization chamber has a great influence on the scattering correction factors. The ksca values vary from 0.9960 to 0.9964 with different chamber depths, which only has 0.04% fluctuation.

show abstract

“…A câmara de ionização de ar livre com placas paralelas (modelo convencional) foi estabelecida como sistema padrão primário nos laboratórios: National Physical Laboratory (NPL, Reino Unido) [GRIMBERGEN et al, 1998], Australian Radiation Protection and Nuclear Safety Agency (ARPANSA, Australia) [BURNS et al, 1999] e no National Institute of Standards and Technology (NIST, EUA) [LAITANO et al, 1998]. A câmara de ionização com cilindros concêntricos foi estabelecida como sistema padrão primário no Ente per le Nuove Tecnologie l'Ambiente (ENEA, Italia) [BURNS et al, 2000], no Physikalisch Technische Bundesanstalt (PTB, Alemanha) [BURNS et al, 2002] e no Institute of Nuclear Energy Research (INER, Taiwan), que construiu uma câmara de ionização de ar livre, estabelecendo como um sistema padrão primário para raios X para níveis de energia entre 50 keV e 300 keV baseado no projeto original de Attix [CHEN et al, 1999] [LEE et al, 2005.…”

Section: 5unclassified

Estabelecimento de um sistema padrão primário para raios X de energias baixas com uma câmara de ionização de ar livre

Silva¹

View full text Add to dashboard Cite

The performance of the INER improved free-air ionization chamber in the comparison of air kerma calibration coefficients for medium-energy X-rays

Cited by 11 publications

References 11 publications

Dosimertry characteristics and performance comparisons: Environmental radiophotoluminescent glass dosemeters versus thermoluminescent dosemeters

Dosimertry characteristics and performance comparisons: Environmental radiophotoluminescent glass dosemeters versus thermoluminescent dosemeters

Corrections for photons attenuation and scattering for the extrapolation chamber for measurement of air-kerma strength of ¹²⁵I brachytherapy source

Estabelecimento de um sistema padrão primário para raios X de energias baixas com uma câmara de ionização de ar livre

Contact Info

Product

Resources

About

The performance of the INER improved free-air ionization chamber in the comparison of air kerma calibration coefficients for medium-energy X-rays

Cited by 11 publications

References 11 publications

Dosimertry characteristics and performance comparisons: Environmental radiophotoluminescent glass dosemeters versus thermoluminescent dosemeters

Dosimertry characteristics and performance comparisons: Environmental radiophotoluminescent glass dosemeters versus thermoluminescent dosemeters

Corrections for photons attenuation and scattering for the extrapolation chamber for measurement of air-kerma strength of 125I brachytherapy source

Estabelecimento de um sistema padrão primário para raios X de energias baixas com uma câmara de ionização de ar livre

Contact Info

Product

Resources

About

Corrections for photons attenuation and scattering for the extrapolation chamber for measurement of air-kerma strength of ¹²⁵I brachytherapy source