Effect of the calibration in water and the build-up cap on the Mg(Ar) ionization chamber measurements

H. Koivunoro; H. Hyvönen; J. Uusi-Simola; I. Jokelainen; A. Kosunen; M. Kortesniemi; T. Seppälä; Iiro Auterinen; S. Savolainen

doi:10.1016/j.apradiso.2011.03.037

Effect of the calibration in water and the build-up cap on the Mg(Ar) ionization chamber measurements

H. Koivunoro^*
, H. Hyvönen
, J. Uusi-Simola
, I. Jokelainen
, A. Kosunen
, M. Kortesniemi
, T. Seppälä
, Iiro Auterinen
, S. Savolainen

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

2 Citations (Scopus)

Abstract

Magnesium-walled argon gas flow ionization chamber (Mg(Ar)) is used for photon dose measurements in the epithermal neutron beam of FiR 1 reactor in Finland. In this study, the photon dose measurements were re-evaluated against calculations applying a new chamber calibration factor defined in water instead of in air. Also, effect of the build-up cap on the measurements was investigated. The new calibration factor provides improved agreement between measured and calculated photon dose. Use of the build-up cap does not affect the measured signal in water in neutron beam.

Original language	English
Pages (from-to)	1901-1903
Journal	Applied Radiation and Isotopes
Volume	69
Issue number	12
DOIs	https://doi.org/10.1016/j.apradiso.2011.03.037
Publication status	Published - 2011
MoE publication type	A1 Journal article-refereed

Keywords

BNCT
60Co
dosimetry
ionization chamber
SERA
MCNP

Access to Document

10.1016/j.apradiso.2011.03.037

Cite this

@article{6e9ddc570e5f48458c7414aa049f1b86,

title = "Effect of the calibration in water and the build-up cap on the Mg(Ar) ionization chamber measurements",

abstract = "Magnesium-walled argon gas flow ionization chamber (Mg(Ar)) is used for photon dose measurements in the epithermal neutron beam of FiR 1 reactor in Finland. In this study, the photon dose measurements were re-evaluated against calculations applying a new chamber calibration factor defined in water instead of in air. Also, effect of the build-up cap on the measurements was investigated. The new calibration factor provides improved agreement between measured and calculated photon dose. Use of the build-up cap does not affect the measured signal in water in neutron beam.",

keywords = "BNCT, 60Co, dosimetry, ionization chamber, SERA, MCNP",

author = "H. Koivunoro and H. Hyv{\"o}nen and J. Uusi-Simola and I. Jokelainen and A. Kosunen and M. Kortesniemi and T. Sepp{\"a}l{\"a} and Iiro Auterinen and S. Savolainen",

note = "Special Issue: 14th International Conference on Neutron Capture Therapy",

year = "2011",

doi = "10.1016/j.apradiso.2011.03.037",

language = "English",

volume = "69",

pages = "1901--1903",

journal = "Applied Radiation and Isotopes",

issn = "0969-8043",

publisher = "Elsevier",

number = "12",

}

TY - JOUR

T1 - Effect of the calibration in water and the build-up cap on the Mg(Ar) ionization chamber measurements

AU - Koivunoro, H.

AU - Hyvönen, H.

AU - Uusi-Simola, J.

AU - Jokelainen, I.

AU - Kosunen, A.

AU - Kortesniemi, M.

AU - Seppälä, T.

AU - Auterinen, Iiro

AU - Savolainen, S.

N1 - Special Issue: 14th International Conference on Neutron Capture Therapy

PY - 2011

Y1 - 2011

N2 - Magnesium-walled argon gas flow ionization chamber (Mg(Ar)) is used for photon dose measurements in the epithermal neutron beam of FiR 1 reactor in Finland. In this study, the photon dose measurements were re-evaluated against calculations applying a new chamber calibration factor defined in water instead of in air. Also, effect of the build-up cap on the measurements was investigated. The new calibration factor provides improved agreement between measured and calculated photon dose. Use of the build-up cap does not affect the measured signal in water in neutron beam.

AB - Magnesium-walled argon gas flow ionization chamber (Mg(Ar)) is used for photon dose measurements in the epithermal neutron beam of FiR 1 reactor in Finland. In this study, the photon dose measurements were re-evaluated against calculations applying a new chamber calibration factor defined in water instead of in air. Also, effect of the build-up cap on the measurements was investigated. The new calibration factor provides improved agreement between measured and calculated photon dose. Use of the build-up cap does not affect the measured signal in water in neutron beam.

KW - BNCT

KW - 60Co

KW - dosimetry

KW - ionization chamber

KW - SERA

KW - MCNP

U2 - 10.1016/j.apradiso.2011.03.037

DO - 10.1016/j.apradiso.2011.03.037

M3 - Article

SN - 0969-8043

VL - 69

SP - 1901

EP - 1903

JO - Applied Radiation and Isotopes

JF - Applied Radiation and Isotopes

IS - 12

ER -

Effect of the calibration in water and the build-up cap on the Mg(Ar) ionization chamber measurements

Abstract

Keywords

Access to Document

Fingerprint

Cite this