IMPROVEMENT OF ESR DOSIMETRY FOR THERMAL NEUTRON BEAMS THROUGH THE ADDITION OF GADOLINIUM

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Abstract

In this paper the addition of gadolinium nucleus is proposed as useful tool to enhance the ESR sensitivity of organic compounds to thermal neutrons. The target of this work is the detection of the thermal neutron fluence in a mixed field of photons and neutrons through the ESR technique. The gadolinium nucleus was chosen because it offers a very high capture cross section to thermal neutrons (255000 barns). The nuclear reaction with neutron induces complex inner shell transitions that generate, besides the other particles, also some Auger electrons which release their energy in the neighborhood (only several nanometers) of the reaction place. Two organic compounds were doped with gadolinium: the alanine and the ammonium tartrate. The main result is a greater neutron sensitivity for the dosimeters with gadolinium than for those without gadolinium for both the organic compounds used. Because the use of a dosimeter pair is required to discriminate the two components of the mixed field, we studied the response of each dosimeters pair to the mixed field. Through a blind test we tested the goodness of this dosimetric system and we obtained an estimate of the fluence in the mixed field with maximum uncertainty of 3% using the dosimeters pair of alanine and alanine with gadolinium.
Original languageEnglish
Pages (from-to)5219-5230
Number of pages12
JournalPhysics in Medicine and Biology
Volume52
Publication statusPublished - 2007

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Neutron beams
Gadolinium
neutron beams
Neutrons
gadolinium
thermal neutrons
Dosimetry
dosimeters
Paramagnetic resonance
Dosimeters
Hot Temperature
alanine
organic compounds
Organic compounds
Alanine
neutrons
fluence
nuclei
Nuclear reactions
Photons

All Science Journal Classification (ASJC) codes

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

Cite this

@article{29248ee7582d407288b6467b38e71452,
title = "IMPROVEMENT OF ESR DOSIMETRY FOR THERMAL NEUTRON BEAMS THROUGH THE ADDITION OF GADOLINIUM",
abstract = "In this paper the addition of gadolinium nucleus is proposed as useful tool to enhance the ESR sensitivity of organic compounds to thermal neutrons. The target of this work is the detection of the thermal neutron fluence in a mixed field of photons and neutrons through the ESR technique. The gadolinium nucleus was chosen because it offers a very high capture cross section to thermal neutrons (255000 barns). The nuclear reaction with neutron induces complex inner shell transitions that generate, besides the other particles, also some Auger electrons which release their energy in the neighborhood (only several nanometers) of the reaction place. Two organic compounds were doped with gadolinium: the alanine and the ammonium tartrate. The main result is a greater neutron sensitivity for the dosimeters with gadolinium than for those without gadolinium for both the organic compounds used. Because the use of a dosimeter pair is required to discriminate the two components of the mixed field, we studied the response of each dosimeters pair to the mixed field. Through a blind test we tested the goodness of this dosimetric system and we obtained an estimate of the fluence in the mixed field with maximum uncertainty of 3{\%} using the dosimeters pair of alanine and alanine with gadolinium.",
author = "Maria Brai and Antonio Bartolotta and D'Oca, {Maria Cristina} and Maurizio Marrale and Rosi and Brai and Marrale and Bartolotta",
year = "2007",
language = "English",
volume = "52",
pages = "5219--5230",
journal = "Physics in Medicine and Biology",
issn = "0031-9155",
publisher = "IOP Publishing Ltd.",

}

TY - JOUR

T1 - IMPROVEMENT OF ESR DOSIMETRY FOR THERMAL NEUTRON BEAMS THROUGH THE ADDITION OF GADOLINIUM

AU - Brai, Maria

AU - Bartolotta, Antonio

AU - D'Oca, Maria Cristina

AU - Marrale, Maurizio

AU - Rosi, null

AU - Brai, null

AU - Marrale, null

AU - Bartolotta, null

PY - 2007

Y1 - 2007

N2 - In this paper the addition of gadolinium nucleus is proposed as useful tool to enhance the ESR sensitivity of organic compounds to thermal neutrons. The target of this work is the detection of the thermal neutron fluence in a mixed field of photons and neutrons through the ESR technique. The gadolinium nucleus was chosen because it offers a very high capture cross section to thermal neutrons (255000 barns). The nuclear reaction with neutron induces complex inner shell transitions that generate, besides the other particles, also some Auger electrons which release their energy in the neighborhood (only several nanometers) of the reaction place. Two organic compounds were doped with gadolinium: the alanine and the ammonium tartrate. The main result is a greater neutron sensitivity for the dosimeters with gadolinium than for those without gadolinium for both the organic compounds used. Because the use of a dosimeter pair is required to discriminate the two components of the mixed field, we studied the response of each dosimeters pair to the mixed field. Through a blind test we tested the goodness of this dosimetric system and we obtained an estimate of the fluence in the mixed field with maximum uncertainty of 3% using the dosimeters pair of alanine and alanine with gadolinium.

AB - In this paper the addition of gadolinium nucleus is proposed as useful tool to enhance the ESR sensitivity of organic compounds to thermal neutrons. The target of this work is the detection of the thermal neutron fluence in a mixed field of photons and neutrons through the ESR technique. The gadolinium nucleus was chosen because it offers a very high capture cross section to thermal neutrons (255000 barns). The nuclear reaction with neutron induces complex inner shell transitions that generate, besides the other particles, also some Auger electrons which release their energy in the neighborhood (only several nanometers) of the reaction place. Two organic compounds were doped with gadolinium: the alanine and the ammonium tartrate. The main result is a greater neutron sensitivity for the dosimeters with gadolinium than for those without gadolinium for both the organic compounds used. Because the use of a dosimeter pair is required to discriminate the two components of the mixed field, we studied the response of each dosimeters pair to the mixed field. Through a blind test we tested the goodness of this dosimetric system and we obtained an estimate of the fluence in the mixed field with maximum uncertainty of 3% using the dosimeters pair of alanine and alanine with gadolinium.

UR - http://hdl.handle.net/10447/10158

M3 - Article

VL - 52

SP - 5219

EP - 5230

JO - Physics in Medicine and Biology

JF - Physics in Medicine and Biology

SN - 0031-9155

ER -