Research of Interaction Processes of Fast and Thermal Neutrons with Solution of Organic Dye Methyl Orange
The emergence of powerful sources of ionizing radiation, the needs of nuclear energy, technology and medicine, as well as the need to develop reliable methods of protection against the harmful effects of penetrating radiation stimulated the development of such branches of science as radiation chemistry, radiation biology, radiation medicine. When an organic dye solution is exposed to ionizing radiation, it irreversibly changes color. As a result, the absorbed dose can be determined. The processes of interaction of neutron fluxes with an aqueous solution of an organic dye methyl orange (МО) – C14H14N3О3SNa, containing and not containing 4% boric acid, have been investigated. The work was carried out on a LINAC LUE-300 at NSC KIPT. A set of tungsten plates was used as a neutron-generating target. The electron energy was 15 MeV, the average current was 20 μA. The samples were located behind the lead shield and without it, with and without a moderator. Using the GEANT4 toolkit code for this experiment, neutron fluxes and their energy spectra were calculated at the location of experimental samples without a moderator and with a moderator of different thickness (1-5 cm). An analysis of the experimental results showed that when objects without lead shielding and without a moderator are irradiated, the dye molecules are completely destroyed. In the presence of lead protection, 10% destruction of the dye molecules was observed. When a five-centimeter polyethylene moderator was installed behind the lead shield, the destruction of dye molecules without boric acid on thermal neutrons was practically not observed. When the fluxes of thermal and epithermal neutrons interacted with a dye solution containing 4% boric acid, 30% destruction of dye molecules was observed due to the exothermic reaction 10B (n, α). The research has shown that solutions of organic dyes are a good material for creating detectors for recording fluxes of thermal and epithermal neutrons. Such detectors can be used for radioecological monitoring of the environment, in nuclear power engineering and nuclear medicine, and in the field of neutron capture therapy research in particular.
Keywords: organic dye, neutrons, dosimeters
. B.I. Stepanov, Введение в химию и технологию органических красителей [Introduction to the chemistry and technology of organic dyes], (Khimiya, Moscow, 1977), pp. 488, (in Russian)
. V.I. Popechits, in: Spektroskopiya i lyuminestsentsiya molekulyarnykh sistem [Spectroscopy and luminescence of molecular systems], edited by E. S. Voropai, K. N. Soloviev, D. S. Umreiko, (BSU, Minsk, 2002), pp. 275-286. (in Russian)
. V.I. Popechits, Vestnik BSU. Ser. 1, 3, 33 (2002). (in Russian)
. V.I. Popechits, Journal of Applied Spectroscopy, 70(1), 34 (2003). (in Russian)
. V.I. Popechits, and O.N. Kravtsova, in: Применение молекулярной люминесценции и спектроскопии к исследованию структуры и свойств вещества [Application of molecular luminescence and spectroscopy to the study of the structure and properties of matter] edited by D.S. Umreyko, A.A. Min'ko, (BSU, Minsk, 2006), pp. 53–56. (in Russian)
. V.I. Popechits, Vestnik BSU. Ser. 1, 2, 49 (2008). (in Russian)
. Milinchuk V.K., Klinshpont E.R., and Tupikov V.I. Основы радиационной стойкости органических материалов [Fundamentals of Radiation Resistance of Organic Materials], (Energoatomizdat, Moscow, 1994). Pp. 256. (in Russian)
. V.K. Milinchuk, Radiation Chemistry, Soros Educational Journal, 4, 24 (2000). (in Russian)
. Geant4 Collaboration, Physics Reference Manual, http://cern.ch/geant4-userdoc/UsersGuides/PhysicsListGuide/fo/PhysicsListGuide.pdf
. Y.A. Afanasʹeva, V.V. Bobkov, S.P. Hokov, V.V. Hrytsyna, O.V. Sukhostavetsʹ, and D.I. Shevchenko, UFZH, 55(2), p.182 (2010). (in Ukrainian)
. S.S. Alimov, I.O. Afanasʹyeva, V.V. Bobkov, S.P. Hokov, V.V. Hrytsyna, and D.I. Shevchenko, UFZH, 56(3), 211 (2011). (in Ukrainian)
. A.Yu. Buki, S.P. Gokov, Yu.G. Kazarinov, S.A. Kalenik, V.I. Kasilov, S.S. Kochetov, P.L. Makhnenko, I.V. Mel'nitskiy, A.V. Tverdokhvalov, V.V. Tsyats'ko, and O.A. Shopen, PAST, 5(93), 98 (2014), https://vant.kipt.kharkov.ua/ARTICLE/VANT_2014_5/article_2014_5_98.pdf
. Ayzatskiy N.I., Afanas'yev S.N., Buki A.Yu., Gokov S.P., Ozhegov L.S., Parkhomenko A.A., Khvastunov V.M., and Shevchenko N.G. Исследования атомных ядер электронами и фотонами с энергией до 300 МэВ [Investigation of Atomic Nuclei with Electrons and Photons with Energy Up to 300 MeV], (NSC “Kharkiv Institute of Physics and Technology”, Kharkiv, 2017), pp. 393. (in Russian)
. V.S. Ivanov, Радиационная химия полимеров [Radiation chemistry of polymers], (Khimiya, Leningrad, LO, 1988), pp. 320. (in Russian)
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).