A study of ZnS(Ag)/6LiF with different mass ratios

Wu, Chong; Tang, Bin; Sun, Zhi‐Wei; Zhang, Q.; Zhi‐Jian, Yang; Zhang, J.; Yang, Yuanchao; Liang, Jintao; Wu, Jian

doi:10.1016/j.radmeas.2013.04.004

Cited by 25 publications

(10 citation statements)

References 9 publications

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“…For sub se quent mea sure ments, the 3 : 1 of the scintillator : con verter ra tio was used for the case of lith ium flu o ride. This con clu sion is con sis tent with the re sults achieved in for mer stud ies [16][17][18][19][20][21]. The im portance of the proper choice of the con cen tra tion and grain size in the mix ture and their ef fect on de tec tion ef fi ciency is ex plained in [5].…”

Section: Re Sults and Discussionsupporting

confidence: 67%

Thermal neutron measurements using YAP:Ce powder

Fiserova

Janda

2019

NUCL TECH RAD PROT

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A YAP:Ce pow der was used as a scintillator for the de tec tion of ther mal neu trons. For neutrons en ergy con ver sion, en riched LiF was used. The de pend ence of the con cen tra tion of the scintillator: LiF ra tio on neu tron de tec tion ef fi ciency was stud ied as well as the in flu ence of ar eal den sity of lay ers and dif fer ent YAP:Ce pow der grains. The preamplifier pulse shape study of YAP:Ce was also pro vided in re sponse to the de pend ence of shape of the am pli tude spec trum on shap ing the time set ting. It was shown that based on the pulse shape from YAP:Ce, the neu tron and gamma pulses can be clearly dis tin guished. The re sults were re lated to the ref er ence mix ture of ZnS:Ag/LiF which is com monly used in com bi na tion with thermal neu tron de tec tors.

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Section: Re Sults and Discussionsupporting

confidence: 67%

Thermal neutron measurements using YAP:Ce powder

Fiserova

Janda

2019

NUCL TECH RAD PROT

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“…The decrease in detection efficiency from that of the simulated 7.8% capture efficiency can be attributed, in large part, to the light attenuation resulting from the opaque nature of the 6 LiF:ZnS(Ag) scintillator. The reason for this is because the detection efficiency of 6 LiF:ZnS(Ag) scintillators primarily depend on two factors: (1) the abundance of 6 Li for neutron capture, and (2) the thickness of the scintillator that optical photons must traverse [34]. Figure 16 shows the P SD and light output corresponding to the thermalization of fast neutrons from 252 Cf and DD sources, including uncorrelated events, and extracted from capture-gated analysis.…”

Section: Resultsmentioning

confidence: 99%

“…It is desirable to understand the detailed optical characteristics of the 6 LiF:ZnS(Ag) scintillator with aluminum foil backing (EJ-426) as this directly contributes to detection efficiency. It is known that the light yield from the 6 LiF:ZnS(Ag) scintillator resulting from HCP energy deposition is approximately three times higher than that of the anthracene crystal [34]; however, much of the light generated in 6 LiF:ZnS(Ag) is attenuated due to its poor transparency. The exact type of the scintillator used in this study is EJ-426-0, which has a 6 LiF:ZnS(Ag) mass ratio of 1:3, and is enriched to 95% 6 Li [30].…”

Section: Optical Properties Of Ej-426 Scintillatormentioning

confidence: 99%

“…The exact type of the scintillator used in this study is EJ-426-0, which has a 6 LiF:ZnS(Ag) mass ratio of 1:3, and is enriched to 95% 6 Li [30]. The mass ratio of 1:3 was chosen for its performance when detecting thermal neutrons [34]. Modeling the complete neutron detection process, from capture to electronic signal generation within the PMT, is challenging due to the heterogeneous nature of the powdery matrix [22].…”

Section: Optical Properties Of Ej-426 Scintillatormentioning

confidence: 99%

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Development and operation of a 6LiF:ZnS(Ag)—scintillating plastic capture-gated detector

Wilhelm

Nattress

Jovanovic

2017

Nuclear Instruments and Methods in Physics Research Section A:

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We report on the design, construction, and operation of a capture-gated neutron detector based on a heterogeneous scintillating structure comprising two scintillator types. A flat, 500 μm thick sheet composed of a mixture of lithium-6-fluoride capture agent, 6 LiF, and zinc sulfide phosphor, ZnS(Ag), is wrapped around scintillating polyvinyl toluene (PVT) in a form of cylinder. The 6 LiF:ZnS(Ag) sheet uses an aluminum foil backing as a support for the scintillating material and as an optical reflector, and its optical properties have been characterized independently. The composite scintillator was tested using 252 Cf, DD fusion, 137 Cs, and 60 Co sources. The intrinsic detection efficiency for neutrons from an unmoderated 252 Cf source and rejection of gammas from 137 Cs were measured to be 3.6% and 10 −6 , respectively. A figure of merit for pulse shape discrimination of 4.6 was achieved, and capture-gated spectroscopic analysis is demonstrated.

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“…In addition, the timing resolution of the detector was mainly affected by the scintillation screen and the TPX3Cam, and needed to be evaluated. The light decay times of the 6 LiF/ZnS and GOS scintillation screen were on the microsecond scale [18][19][20][21]. CSNS has a high neutron flux, the detector is necessary to have a good timing resolution.…”

Section: Methodsmentioning

confidence: 99%