PUBLICATIONS

  • ISSN No. Print
  • ISSN No. Online
  • Registration No.
  • Periodicity
  • Print
  • Online
  • Website

Measurements of Neutrons In A Mixed Gamma- Neutron Field Using Three Different Types of Detectors

DOI
https://doi.org/10.15415/jnp.2017.51021

AUTHORS

B Leal, F. Castillo,J Gutierrez, JI Golzarri, I Gamboa-Debuen, G. Espinosa H Martínez

ABSTRACT

A linear electron accelerator for medical use is a device for the treatment of tumors by collimated beams of electrons and/or photons. These accelerators are devices that employ electromagnetic waves of high frequency, to accelerate electrons that are used directly in the treatment of superficial tumors, or, if they are made to hit them on an appropriate target, they can produce photons of high energy destined to the treatment of deeptumors.Depending on the energy of the electrons and photons and the materials that make up the head of the accelerator and the target, this equipment will produce in addition to the aforementioned radiation, neutron fields of regular intensity. It is necessary to estimate the equivalent dose due to the neutrons themselves, the doses due to the gamma field of neutron capture, produced by the capture of thermal neutrons in the concrete of the bunker, and the gamma doses due to phenomena of neutron activation of elements of the own accelerator. It is therefore important to be able to measure (detect, quantify, dose, etc.) both photons and neutrons in these cases and others more. In this work we use three different detectors, namely a scintillator-photomultiplier system, a fast reading dosimeter and bubble detector. The idea is to measure the radiation separately and compare their results. The results obtained were the mixed gamma-neutron field spectrum, the dose due only to neutrons obtained by the bubble detectors, which is compared to the dose obtained by the second fast reading dosimeters (model 884), plus the dose obtained by the first dosimeters (model 609) and finally the dose obtained by the Victoreen dosimeter.

KEYWORDS

Detectors, Gammas, Neutrons, Dosimeters, Dose

REFERENCES

  • ICRP103, 2007 International Commission on Radiological Protection. The 2007 Recommendations of the International Commission on Radiological Protection. Publication 103, Annals of the ICRP 37(2-4) (Oxford: Pergamon Press) (2007)
  • Neutron-gamma discrimination with stilbene and liquid scintillators, PerkinElmer Instruments-ORTEC, report 39580589 (1998)
  • Dickens J. et. al., An NE213-Scintillatior-based neutron detection system for diagnostic measurements of energy spectra for neutrons having energies greater than 0.8 MeV created during plasma operation at the Princeton Tokomak Fusion test reactor, Oak Ridge National Laboratory Central National Library ORNL/ TM-9561, (1985)
  • Scherzinger, J, et. al., Tagging fast neutrons from an Am241/Be9 source, Applied Radiation and Isotopes 98, 74–79, (2015)
  • Improving Neutron Dosimetry Using Bubble Detector Technology, M. A. Buckner, (2006)
  • Bubble Technology Industries (BTI), Product Catalog, Chalk River, Ontario, Canada. October (2005)
  • Falcão, R.C., Alexandre P. J. and DeAlmeida C.E., Neutron spectrometry with bubble detectors, International Nuclear Atlantic Conference - INAC 2009, ISBN: 978-85-99141-03-8, (2009)
  • Ramalho E., Reina L., da Silva A.X. and Facure A., Bubble detector’s evaluation for neutron field measurements in a much known source, International Nuclear Atlantic Conference - INAC 2011, ISBN: 978-85-99141-04-5, (2011)
  • Bonin H.W., Desnoyers G.R., and Cousins T., Fast neutron dosimetry and spectroscopy using bubble detectors, Radiation Protection Dosimetry, Vol. 46, No. 4, pp. 265–271 (1993)
  • BF 3 Neutron Detector Tests. U. S. Department of energy, Pacific Northwest, National Laboratory. December 9, (2009)
  • Sharpe J., Salmon P.G., Characteristics of BF 3 Counters and Precautions to be adopted in their use, A.E.R.E. Report EL/R 1073 (1952)
  • Reglamento general seguridad radiológica (Publicado en el D.O.F. del 22 de noviembre de 1988) (1989)
Call for Papers Publication Policy Instructions to the Authors Paper Submission Subscription Form Copyright Form Author Profile Format Sample paper Recommend to a Librarian

Refereed Research Journal

Member of CrossRef

Index Copernicus Value

ICV 2014: 43.38

Indexing









Call for Papers

Invites Papers for next issue of Journal of Nuclear Physics, Material Sciences, Radiation and Applications

Frequency

Journal of Nuclear Physics, Material Sciences, Radiation and Applications is published Bi - Annually

Number-1 August
Number-2 February