Detection of neutrons in a wide energy range with crystalline Gd3Al2Ga3O12, Lu2SiO5 and LaBr3 doped with Ce scintillators

Korzhik, M.; Brinkmann, Kai-Thomas; Dosovitskiy, G.; Dormenev, V.; Fedorov, A.; Komar, Damian; Kozemiakin, V.; Koзлов, Д.; Mechinsky, V.; Zaunick, Hans-Georg; Yashin, I. V.; Iyudin, A. F.; Bogomolov, V. V.; Свертилов, С. И.; Maximov, Ivan

doi:10.1016/j.nima.2019.04.034

Cited by 8 publications

(3 citation statements)

References 12 publications

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“…The significant detection improvement could be attributed to the ability of the lithium doping element to interact with neutrons, justified by its high absorption shock section (640 barns). This demonstrates that lithium doped CsI crystals can be exploited in mixed-field neutron detection arrangements as they will not suffer significant gamma radiation interference and can provide more reliable neutron detection [13]. For neutrons to become thermalized it is necessary that they undergo collisions when crossing the field, losing part of their energy until they reach thermal range.…”

Section: Resultsmentioning

confidence: 99%

OPTICAL PROPERTIES AND RADIATION RESPONSE OF Li ION-DOPED CsI SCINTILLATOR CRYSTAL

Pereira¹,

Filho²,

Berretta³

et al. 2020

RAP 2019 Conference Proceedings

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Scintillators are materials that convert the energy of ionizing radiation into a flash of light. Due to the existence of different types of scintillators, they are classified into three groups according to their physicochemical characteristics, namely, inorganic, organic and gaseous scintillators. Among the inorganic crystals, the most frequently used as scintillator consist of alkali metals, in particular alkaline iodides. Scintillation materials have many applications, for instance in medical imaging, security, physics, biology, non-destructive inspection and medicine. In this study, lithium doped CsI scintillator crystals were grown using the vertical Bridgman technique. The concentration of the lithium doping element (Li) studied was 10 -4 M to 10 -1 M. Analyses were carried out to evaluate the developed scintillators with regard to luminescence emission and optical transmittance. The luminescence emission spectra of these crystals were measured with a monochromator for gamma radiation from 137 Cs source excitation. The determination of the dopant distribution along the crystalline axis allowed the identification of the region with Li concentration uniformity, which is the region of the crystalline volume indicated for use as a radiation detector. The crystals were excited with neutron radiation from AmBe source, with the energy range of 1 MeV to 12 MeV. As neutron sources also generate gamma radiation, which can interfere with the measurement, it is necessary that the detector be able to discriminate the presence of such radiation. Accordingly, experiments were performed using gamma radiation in the energy range of 59 keV to 1333 keV in order to verify the ability of the detector to discriminate the presence of different types of radiation.

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Section: Resultsmentioning

confidence: 99%

OPTICAL PROPERTIES AND RADIATION RESPONSE OF Li ION-DOPED CsI SCINTILLATOR CRYSTAL

Pereira¹,

Filho²,

Berretta³

et al. 2020

RAP 2019 Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…The significant detection improvement coul be attributed to the ability of the lithium doping element to interact with neutrons, justified by its high absorption shock section (640 barns). This demonstrates that lithium doped CsI crystals may be exploited in mixed-field neutron detection arrangements as they will not undergo significant gamma radiation interference and, thus, they could provide a more reliable neutron detection [14].…”

Section: Source: the Authorsmentioning

confidence: 94%

Growth and optical caracteristics of the CsI:Li scintillator crystal for use as radiation detector

et al. 2021

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Materials capable of converting ionizing radiation into light photons are called scintillators, some have specific efficiencies for certain applications and types of radiation, e.g. gamma, X-ray, alpha, beta and neutrons. CsI:Tl and NaI:Tl crystals are commonly found in the market because they have several applications, but few studies have been done on lithium doped cesium iodide crystal (CsI:Li). The lithium element, in this crystal used as a dopant, is also exploited as a converter for neutron detection, as it has a shock section of 940 barns for thermal neutrons. The study of the CsI:Li crystal is convenient considering the natural abundance of the lithium element with 7.5%, besides the interest in having a low cost national scintillator material with an opportunity to search the response of a detector for different types of radiation. The CsI:Li crystal was grown with molar concentration 10-4 to 10-1, using the vertical Bridgman technique. The parameters involved in the growth process were investigated. The transmittance was evaluated in the spectral region from 190 nm to 1100 nm. Luminescence emission spectra for the CsI:Li crystal were evaluated by photometric analysis of the crystal stimulated with a 137Cs (662 keV) source in front of the coupled sample at the monochromator input. The crystals showed of maximum luminescence intensity at the wavelength of 420 nm. The response of the scintillators when excited with gamma radiation of 241Am, 133Ba, 22Na, 137Cs, 60Co and neutron radiation from the AmBe source, with energy range of 1 MeV to 12 Mev was evaluated.

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“…Неорганические сцинтилляционные материалы, содержащие изотоп 6 Li [1,2] зарекомендовали себя как эффективные детекторные материалы для регистрации тепловых нейтронов. Недавно было установлено, что расширение энергетического диапазона регистрируемых нейтронов обеспечивается при использовании гадолиний-содержащих кристаллических сцинтилляторов [3,4]. Стеклянные сцинтилляционные материалы обладают невысоким выходом сцинтилляций по сравнению с кристаллическими соединениями, однако при наполнении композиции стекла ионами с ядрами, активно поглощающими нейтроны с образованием вторичных ионизирующих частиц, могут рассматриваться как альтернатива кристаллическим материалам, прежде всего благодаря их относительно простому и недорогому способу производства.…”

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Gadolinium contained scintillation glass for neutron detection in a wide energy range.

Korzhik

2021

Vescì Akademìì navuk Belarusì. Seryâ fizika-matematyčnyh navuk

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Inorganic scintillation glasses form a domain of rapidly evolving detector materials used to measure various types of ionizing radiation. The most widespread are lithium-silicate glasses enriched with the 6Li isotope, which are used to register thermal neutrons. At the same time, due to the specificity of the energy dependence of the neutron cross-section of light nuclei, such materials are of little use for the evaluation of epithermal and more highly energetic neutrons. The use of rare earth elements in the composition of glasses makes it possible to increase the sensitivity to neutrons. In the BaO–Gd2O3–SiO2 system, doped with Ce ions, a scintillation glass with a yield of at least 2500 photons / MeV was created for the first time, which permits to create inexpensive detector elements of a significant volume for registering neutrons. It has been shown that a detector based on BaO–Gd2O3–SiO2 glass has satisfactory properties when detecting neutrons in a wide spectrum of their energies.

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Detection of neutrons in a wide energy range with crystalline Gd3Al2Ga3O12, Lu2SiO5 and LaBr3 doped with Ce scintillators

Cited by 8 publications

References 12 publications

OPTICAL PROPERTIES AND RADIATION RESPONSE OF Li ION-DOPED CsI SCINTILLATOR CRYSTAL

OPTICAL PROPERTIES AND RADIATION RESPONSE OF Li ION-DOPED CsI SCINTILLATOR CRYSTAL

Growth and optical caracteristics of the CsI:Li scintillator crystal for use as radiation detector

Gadolinium contained scintillation glass for neutron detection in a wide energy range.

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