Twin ionisation chambers for dose determinations in phantom in an epithermal neutron beam

Antti Kosunen, Mika Kortesniemi, Hanna Ylä-Mella, Tiina Seppälä, Johanna Lampinen, Tom Seren, Iiro Auterinen, Hannu Järvinen, Sauli Savolainen

Research output: Contribution to journalArticleScientificpeer-review

33 Citations (Scopus)

Abstract

The validity of the twin ionisation chamber technique for determination of gamma and neutron doses in an epithermal neutron beam has been studied by comparison of measured and calculated dose distributions in a water phantom. The measurements were performed in two epithermal neutron beams, designed for boron neutron capture therapy, at the FiR 1 TRIGA nuclear reactor using two pairs of A150 tissue-equivalent and non-hydrogenous Mg(Ar) ionisation chambers. Doses were calculated by the two-dimensional discrete ordinates radiation transport code applying the fluence-to-dose conversion factors by ICRU. At the dose maximum in the phantom 5% consistency between measured and calculated results was achieved for both neutron and gamma doses. Improvements in chamber materials and precise knowledge of the fluence perturbation effects of the chambers are needed to decrease the measurement uncertainty to an acceptable level.
Original languageEnglish
Pages (from-to)187-194
Number of pages8
JournalRadiation Protection Dosimetry
Volume81
Issue number3
DOIs
Publication statusPublished - 1999
MoE publication typeA1 Journal article-refereed

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neutron beams
Neutrons
ionization chambers
dosage
Boron Neutron Capture Therapy
Nuclear Reactors
neutrons
fluence
chambers
Uncertainty
radiation transport
nuclear reactors
Radiation
Water
therapy
boron
perturbation
water

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Kosunen, A., Kortesniemi, M., Ylä-Mella, H., Seppälä, T., Lampinen, J., Seren, T., ... Savolainen, S. (1999). Twin ionisation chambers for dose determinations in phantom in an epithermal neutron beam. Radiation Protection Dosimetry, 81(3), 187-194. https://doi.org/10.1093/oxfordjournals.rpd.a032585
Kosunen, Antti ; Kortesniemi, Mika ; Ylä-Mella, Hanna ; Seppälä, Tiina ; Lampinen, Johanna ; Seren, Tom ; Auterinen, Iiro ; Järvinen, Hannu ; Savolainen, Sauli. / Twin ionisation chambers for dose determinations in phantom in an epithermal neutron beam. In: Radiation Protection Dosimetry. 1999 ; Vol. 81, No. 3. pp. 187-194.
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abstract = "The validity of the twin ionisation chamber technique for determination of gamma and neutron doses in an epithermal neutron beam has been studied by comparison of measured and calculated dose distributions in a water phantom. The measurements were performed in two epithermal neutron beams, designed for boron neutron capture therapy, at the FiR 1 TRIGA nuclear reactor using two pairs of A150 tissue-equivalent and non-hydrogenous Mg(Ar) ionisation chambers. Doses were calculated by the two-dimensional discrete ordinates radiation transport code applying the fluence-to-dose conversion factors by ICRU. At the dose maximum in the phantom 5{\%} consistency between measured and calculated results was achieved for both neutron and gamma doses. Improvements in chamber materials and precise knowledge of the fluence perturbation effects of the chambers are needed to decrease the measurement uncertainty to an acceptable level.",
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Kosunen, A, Kortesniemi, M, Ylä-Mella, H, Seppälä, T, Lampinen, J, Seren, T, Auterinen, I, Järvinen, H & Savolainen, S 1999, 'Twin ionisation chambers for dose determinations in phantom in an epithermal neutron beam', Radiation Protection Dosimetry, vol. 81, no. 3, pp. 187-194. https://doi.org/10.1093/oxfordjournals.rpd.a032585

Twin ionisation chambers for dose determinations in phantom in an epithermal neutron beam. / Kosunen, Antti; Kortesniemi, Mika; Ylä-Mella, Hanna; Seppälä, Tiina; Lampinen, Johanna; Seren, Tom; Auterinen, Iiro; Järvinen, Hannu; Savolainen, Sauli.

In: Radiation Protection Dosimetry, Vol. 81, No. 3, 1999, p. 187-194.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Twin ionisation chambers for dose determinations in phantom in an epithermal neutron beam

AU - Kosunen, Antti

AU - Kortesniemi, Mika

AU - Ylä-Mella, Hanna

AU - Seppälä, Tiina

AU - Lampinen, Johanna

AU - Seren, Tom

AU - Auterinen, Iiro

AU - Järvinen, Hannu

AU - Savolainen, Sauli

PY - 1999

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N2 - The validity of the twin ionisation chamber technique for determination of gamma and neutron doses in an epithermal neutron beam has been studied by comparison of measured and calculated dose distributions in a water phantom. The measurements were performed in two epithermal neutron beams, designed for boron neutron capture therapy, at the FiR 1 TRIGA nuclear reactor using two pairs of A150 tissue-equivalent and non-hydrogenous Mg(Ar) ionisation chambers. Doses were calculated by the two-dimensional discrete ordinates radiation transport code applying the fluence-to-dose conversion factors by ICRU. At the dose maximum in the phantom 5% consistency between measured and calculated results was achieved for both neutron and gamma doses. Improvements in chamber materials and precise knowledge of the fluence perturbation effects of the chambers are needed to decrease the measurement uncertainty to an acceptable level.

AB - The validity of the twin ionisation chamber technique for determination of gamma and neutron doses in an epithermal neutron beam has been studied by comparison of measured and calculated dose distributions in a water phantom. The measurements were performed in two epithermal neutron beams, designed for boron neutron capture therapy, at the FiR 1 TRIGA nuclear reactor using two pairs of A150 tissue-equivalent and non-hydrogenous Mg(Ar) ionisation chambers. Doses were calculated by the two-dimensional discrete ordinates radiation transport code applying the fluence-to-dose conversion factors by ICRU. At the dose maximum in the phantom 5% consistency between measured and calculated results was achieved for both neutron and gamma doses. Improvements in chamber materials and precise knowledge of the fluence perturbation effects of the chambers are needed to decrease the measurement uncertainty to an acceptable level.

U2 - 10.1093/oxfordjournals.rpd.a032585

DO - 10.1093/oxfordjournals.rpd.a032585

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