EJ-301 exhibits excellent pulse shape discrimination (PSD) properties, particularly for fast neutron counting and spectrometry in the presence of gamma radiation. It is identical to the widely reported NE-213 and exhibits all of the properties of that scintillator.
EJ-309 has been developed as an alternate to the more commonly used low-flash point PSD liquid scintillators based on the solvent xylene. With a flash point of 144°C, it eliminates the fire hazard associated with low-flash point liquid scintillators. While EJ-309 provides slightly poorer PSD characteristics than that of EJ-301, EJ-309 possesses a number of chemical properties recommending it for use in environmentally difficult conditions. These properties include: high flash point, low vapor pressure, low chemical toxicity, and compatibility with cast acrylic plastics. EJ-309 is also available loaded with natural boron as EJ-309B.
|Light Output (% Anthracene)||78||80|
|Scintillation Efficiency (photons/1 MeV e-)||12,000||12,300|
|Wavelength of Maximum Emission (nm)||425||424|
|Decay Time, Short Component (ns)||3.2||3.5|
|Mean Decay Times of First 3 Componenets (ns)
|Bulk Light Attenuation Length (m)||2.5-3||>1|
|Flash Point (°C)||26||144|
|Boiling Point (°C at 1 atm)||141||290-300|
|Vapor Pressure (mm Hg. at 20°C)||-||0.002|
|No. of H Atoms per cm3 (x1022)||4.82||5.43|
|No. of C Atoms per cm3 (x1022)||3.98||4.35|
|No. of Electrons per cm3 (x1023)||2.27||3.16|