LiCaAlF6 scintillators in neutron and gamma radiation fields

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F16%3AN0000032" target="_blank" >RIV/26722445:_____/16:N0000032 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/16:00486155

Výsledek na webu

<a href="http://dx.doi.org/10.1142/S2010194516602349" target="_blank" >http://dx.doi.org/10.1142/S2010194516602349</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1142/S2010194516602349" target="_blank" >10.1142/S2010194516602349</a>

Jazyk výsledku

angličtina

Název v původním jazyce

LiCaAlF6 scintillators in neutron and gamma radiation fields

Popis výsledku v původním jazyce

Intentionally doped LiCaAlF6 (LiCAF) single crystals are prospective scintillators, especially for thermal neutron detection through the Li-6(n, t) He-4 nuclear reaction. Four different LiCAF scintillator samples were tested in various neutron and gamma fields. Two of the tested samples were LiCAF: Eu and LiCAF: Eu, Na single crystals, and another two samples were made of LiCAF: Eu micro crystals dispersed in transparent rubber, with different rubber dimensions. All LiCAF samples contain lithium enriched to Li-6. A plutonium-beryllium source was used as a neutron source. The neutron spectrum was modified by moderator and filter to get different ratios between thermal, epithermal and fast neutron fluence rates. The MCNP code was used for calculations of the fluence rates for different configurations. Radionuclides Cs-137 and Co-60 were applied as gamma radiation sources. The light signal from the scintillator was evaluated with a photomultiplier and a multichannel analyzer. The purpose of this work was to study the characteristics of LiCAF scintillators, especially the ability to discriminate signals from neutron and gamma radiation, which is the basic scintillator condition for neutron detection in mixed neutron-gamma radiation fields. Generally, the discrimination can be done by the pulse height and/or the pulse shape of the evaluated signals. Both methods can be used for a LiCAF scintillator. However, only the pulse height discrimination method is discussed in this paper. The possibility of fast neutron detection with LiCAF scintillators was also tested.

Název v anglickém jazyce

LiCaAlF6 scintillators in neutron and gamma radiation fields

Popis výsledku anglicky

Intentionally doped LiCaAlF6 (LiCAF) single crystals are prospective scintillators, especially for thermal neutron detection through the Li-6(n, t) He-4 nuclear reaction. Four different LiCAF scintillator samples were tested in various neutron and gamma fields. Two of the tested samples were LiCAF: Eu and LiCAF: Eu, Na single crystals, and another two samples were made of LiCAF: Eu micro crystals dispersed in transparent rubber, with different rubber dimensions. All LiCAF samples contain lithium enriched to Li-6. A plutonium-beryllium source was used as a neutron source. The neutron spectrum was modified by moderator and filter to get different ratios between thermal, epithermal and fast neutron fluence rates. The MCNP code was used for calculations of the fluence rates for different configurations. Radionuclides Cs-137 and Co-60 were applied as gamma radiation sources. The light signal from the scintillator was evaluated with a photomultiplier and a multichannel analyzer. The purpose of this work was to study the characteristics of LiCAF scintillators, especially the ability to discriminate signals from neutron and gamma radiation, which is the basic scintillator condition for neutron detection in mixed neutron-gamma radiation fields. Generally, the discrimination can be done by the pulse height and/or the pulse shape of the evaluated signals. Both methods can be used for a LiCAF scintillator. However, only the pulse height discrimination method is discussed in this paper. The possibility of fast neutron detection with LiCAF scintillators was also tested.

Druh

D - Stať ve sborníku

CEP obor

JF - Jaderná energetika

OECD FORD obor

—

Projekt

<a href="/cs/project/TA01010237" target="_blank" >TA01010237: Pracoviště pro nedestruktivní testování, diagnostiku a 3D zobrazování pomocí neutronové radiografie a tomografie</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 2015 International Conference on Applications of Nuclear Techniques (CRETE15), Book Series: International Journal of Modern Physics-Conference Series, Volume: 44

ISBN

—

ISSN

2010-1945

e-ISSN

—

Počet stran výsledku

10

Strana od-do

UNSP 1660234

Název nakladatele

World Scientific Publ Co

Místo vydání

Farrer, Singapore

Místo konání akce

Crete, Greece

Datum konání akce

14. 7. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000385793900028