S&M Young Researcher Paper Award 2020
Recipients: Ding Jiao, Zao Ni, Jiachou Wang, and Xinxin Li [Winner's comments]
Paper: High Fill Factor Array of Piezoelectric Micromachined
Ultrasonic Transducers with Large Quality Factor

S&M Young Researcher Paper Award 2021
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Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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S&M2614 Research Paper of Special Issue

Development of Zr-loaded Green-emitting Liquid Scintillator for Detection of Neutrinoless Double Beta Decay

Akito Watanabe, Arisa Magi, Masanori Koshimizu, Atsushi Sato, Yutaka Fujimoto, and Keisuke Asai

(Received March 6, 2021; Accepted May 14, 2021)

Keywords: neutrinoless double beta decay, liquid scintillator, organometallic complex, 96Zr

In this study, zirconium acetylacetonate (Zr(acac)4) containing the isotope 96Zr was studied as a liquid scintillator for the possible detection of neutrinoless double beta decay. To avoid the absorption of scintillation by ligand absorption, the phosphor Coumarin 7 was assessed as a green-emitting liquid scintillator. By dissolving 3 g/L of Coumarin 7 in anisole, a liquid scintillator with a light yield of 12000 photons/MeV was fabricated. Subsequently, the liquid scintillator was loaded with Zr(acac)4. In the liquid scintillator containing 10 wt% Zr(acac)4, the light yield of scintillation was 370 photons/MeV for a blue-emitting liquid scintillator, while a light yield of 1900 photons/MeV was determined for a green-emitting liquid scintillator. The scintillation decay time constants of the fast component were around 4.4 ns. Liquid scintillators with a high light yield that avoid absorption by Zr(acac)4 can be prepared using Coumarin 7.

Corresponding author: Akito Watanabe

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