Development of (Gd, 6Li)-loaded organic liquid scintillators for reactor neutrino detection

Kim, Ba Ro; Kim, Seung Chan; Joo, K. K.; Shin, Chang Dong; So, Sun Heang; Yeo, In Sung

doi:10.3938/jkps.66.768

Cited by 8 publications

(8 citation statements)

References 15 publications

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“…65) LAB-and DIN-based Li-loaded scintillator cocktails have also been developed. 66) In another approach, 6 Li was loaded as LiCl in alcohol-toluene mixed solvent-based liquid scintillators. 67) In this study, there was a trade-off between the scintillation light yield and the loaded concentration of LiCl according to the ratio of alcohol and toluene in the solvent.…”

Section: Liquid Scintillators Loaded With Inorganic or Organometallic...mentioning

confidence: 99%

“…Gd-loaded liquid scintillators are commercially available as EJ-331 (equivalent to BC-521) and EJ-335 (equivalent to BC-525). In addition to the commercially available ones, novel liquid scintillators loaded with Gd have been developed, such as liquid scintillators based on pseudocumene and mineral oil loaded with Gd complex with 2-ethylhexa-noate, 68) PXE-dodecane-based ones loaded with Gd-tris-(2,2,6,6-tetramethyl-heptane-3,5-dionate), 69) LAB- 66,70) and DIN-based 66,70) ones loaded with Gd complex with 3,5,5trimethylhexanoic acid. One particular point of Gd-loaded liquid scintillators is that they have been used in multi-ton scales in applications of neutrino detection via collision with protons and inverse beta decay.…”

Section: Liquid Scintillators Loaded With Inorganic or Organometallic...mentioning

confidence: 99%

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Recent progress of organic scintillators

Koshimizu¹

2022

Jpn. J. Appl. Phys.

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Recent development of organic scintillators is reviewed from the viewpoint of materials science. Design and crystal growth of organic crystalline scintillators, use of novel solvents and solutes in liquid scintillators, and development of plastic scintillators based on novel polymer hosts or novel fluorescent molecules are introduced. Additionally, development of loaded liquid or plastic scintillators is reviewed on the basis of two approaches of loading: molecules or nanoparticles. A disadvantage of organic scintillators has been their low scintillation light yields. Hence, materials design for improving scintillation light yields is introduced in detail with description on related excited state dynamics. Finally, future prospect for the improvement of scintillation light yield is briefly given.

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Section: Liquid Scintillators Loaded With Inorganic or Organometallic...mentioning

confidence: 99%

Section: Liquid Scintillators Loaded With Inorganic or Organometallic...mentioning

confidence: 99%

Recent progress of organic scintillators

Koshimizu¹

2022

Jpn. J. Appl. Phys.

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“…In this case, though, the higher energy of the α particle and the lower quenching of the triton result in an electron equivalent energy from 400 to 500 keV ee [137], nearly ten times as large as that for the lowest energy α particle from capture on 10 B cited above. A number of authors [137,138,139], and among them the PROSPECT Collaboration [140], studied in detail the possibility of loading organic liquid solvents with aqueous solutions of 6 LiCl, and their collective work has established a sound and safe avenue for the development of 6 Li-loaded organic liquid scintillators.…”

Section: Baseline Designmentioning

confidence: 99%

DarkSide-20k: A 20 Tonne Two-Phase LAr TPC for Direct Dark Matter Detection at LNGS

Aalseth,

Acerbi,

Agnes

et al. 2017

Preprint

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Building on the successful experience in operating the DarkSide-50 detector, the Dark-Side Collaboration is going to construct DarkSide-20k, a direct WIMP search detector using a two-phase Liquid Argon Time Projection Chamber (LAr TPC) with an active (fiducial) mass of 23 t (20 t). The DarkSide-20k LAr TPC will be deployed within a shield/veto with a spherical Liquid Scintillator Veto (LSV) inside a cylindrical Water Cherenkov Veto (WCV). Operation of DarkSide-50 demonstrated a major reduction in the dominant 39 Ar background when using argon extracted from an underground source, before applying pulse shape analysis. Data from DarkSide-50, in combination with MC simulation and analytical modeling, shows that a rejection factor for discrimination between electron and nuclear recoils of >3 × 10 9 is achievable. This, along with the use of the veto system, is the key to unlocking the path to large LAr TPC detector masses, while maintaining an "instrumental background-free" experiment, an experiment in which less than <0.1 events (other than ν-induced nuclear recoils) is expected to occur within the WIMP search region during the planned exposure. DarkSide-20k will have ultra-low backgrounds than can be measured in situ. This will give sensitivity to WIMP-nucleon cross sections of 1.2 × 10 −47 cm 2 (1.1 × 10 −46 cm 2 ) for WIMPs of 1 TeV/c 2 (10 TeV/c 2 ) mass, to be achieved during a 5 yr run producing an exposure of 100 t yr free from any instrumental background. DarkSide-20k could then extend its operation to a decade, increasing the exposure to 200 t yr, reaching a sensitivity of 7.4 × 10 −48 cm 2 (6.9 × 10 −47 cm 2 ) for WIMPs of 1 TeV/c 2 (10 TeV/c 2 ) mass.

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“…The detector uses a single photomultiplier, and shows the potential for use of the 6 LiF:ZnS(Ag) scintillator in a simple, fast neutron spectrometer through the capture-gating technique, while maintaining high neutron detection efficiency. These characteristics make it highly suitable for a number of applications in nuclear security, but also for applications in basic research such as antineutrino detection [24,25,26] and medical applications [27,28]. Additionally, we report on the independently characterized optical properties of the 6 LiF:ZnS(Ag) scintillator and its performance within the heterogeneous fast neutron detector.…”

Section: Introductionmentioning

confidence: 99%

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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Development of (Gd, 6Li)-loaded organic liquid scintillators for reactor neutrino detection

Cited by 8 publications

References 15 publications

Recent progress of organic scintillators

Recent progress of organic scintillators

DarkSide-20k: A 20 Tonne Two-Phase LAr TPC for Direct Dark Matter Detection at LNGS

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

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