Development of liquid scintillators based on mixed-organic solvents containing 6Li for neutron detection

Sae Arai, Masanori Koshimizu, Yutaka Fujimoto, Takayuki Yanagida, Keisuke Asai

Research output: Contribution to journalReview articlepeer-review


Neutron detectors have diverse applications in exploring natural resources and in security systems. Because there is an increased demand for neutron detectors based on 3He proportional counters, and 3He shortage is a concern. Hence, an alternative approach for large-scale detectors is necessary In this work, as an alternative to the 3He proportional counters, we propose a simple method of fabricating liquid scintillators for neutron detection with mixed-organic solvents containing 6Li as liquid scintillators. 6LiCl and the phosphors, DPO and POPOP, were added to a mixed organic solvent consisting of toluene and ethanol along with a given amount of 6Li. We succeeded to fabricate the liquid scintillators containing 6Li with simple preparation and low cost compared to previous approaches. Further, in the measurement of the pulse height spectra, the thermal neutron peaks could be observed for the developing liquid scintillators. The light yields of the liquid scintillators were approximately 1200 photons/neutron.


  • Li
  • Neutron detection
  • Pulse height spectra
  • Scintillator
  • Thermal neutron

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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