6Li-loaded liquid scintillators produced by direct dissolution of compounds in diisopropylnaphthalene (DIPN)

Zaitseva, N. P.; Carman, M. L.; Ford, M. J.; Glenn, A. M.; Roca, Ch; Durham, S.; Sutanto, F.; Dazeley, S. A.; Bowden, N. S.

doi:10.1016/j.nima.2023.168389

Title: ⁶Li-loaded liquid scintillators produced by direct dissolution of compounds in diisopropylnaphthalene (DIPN)

Journal Article · Mon May 29 00:00:00 EDT 2023 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2023.168389· OSTI ID:2281479

Zaitseva, N. P. ^[1]; Carman, M. L. ^[1]; Ford, M. J. ^[1];

^[1];

^[1]; Durham, S. ^[1];

^[1]; Dazeley, S. A. ^[1];

^[1]

Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Here, this paper describes preparation of ⁶Li-loaded liquid scintillators by methods involving direct dissolution of 6Li salts in the commercial diisopropylnaphthalene (DIPN) solvent, without the formation of water-in-oil emulsions. Methods include incorporation of ⁶Li that, unlike previously reported formulations, does not require additions of water or a strong acid such as hydrochloric acid (HCl). Results of the conducted experiments show that dissolution of aromatic and aliphatic ⁶Li salts in DIPN can be easily achieved at 0.1%–0.3% by weight of atomic ⁶Li, using small additions of waterless surfactants, or mild carboxylic acids. An alternative way suggests incorporation of ⁶Li as a part of a surfactant molecule that can be dissolved in DIPN without any solubilizing additions. Proposed methods enable preparation of efficient ⁶Li-loaded liquid scintillators that, at a large scale of 50 cm, exhibit good pulse shape discrimination (PSD) properties combined with up to 107% of light output and up to 115% of the attenuation length measured relative to standard undoped EJ-309 liquid scintillator.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 2281479

Alternate ID(s):: OSTI ID: 1985183

Report Number(s):: LLNL-JRNL-846737; 1070459

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 1054; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Title: 6Li-loaded liquid scintillators produced by direct dissolution of compounds in diisopropylnaphthalene (DIPN)

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Title: ⁶Li-loaded liquid scintillators produced by direct dissolution of compounds in diisopropylnaphthalene (DIPN)