Measurement of Response Functions of a Liquid Organic Scintillator for Neutrons up to 800 Me V

Abstract

Response functions of a BC501A liquid organic scintillator for neutrons up to 800 MeV have been measured at the heavy-ion accelerator of the National Institute of Radiological Sciences, Japan. A thick graphite target was bombarded with 400-MeV/u C ions and 800-MeV/u Si ions to produce high-energy neutrons whose kinetic energy was determined by the time-of-flight method. The measured response functions were compared with the results obtained using SCINFUL-QMD code, and the accuracy of the code was experimentally verified up to 800 MeV. This work will contribute to extending the energies measurable with our new radiation dose-monitoring system (DARWIN), which is based on the BC501A scintillator.

KEYWORDS:

• response function
• liquid organic scintillator
• BC501A
• SCINFUL-QMD
• high-energy neutron
• DARWIN
• radiation monitor