EJ-276 pulse-shape discriminating (PSD) plastic scintillator enables the separation of gamma and fast neutron signals on the basis of their timing characteristics. This scintillator replaces all versions of EJ-299-33 and EJ-299-34 PSD scintillators and embodies the following improvements:
· Excellent physical hardness, equal to or superior to that of standard plastic scintillators
· Long-term stability of scintillation and optical characteristics
· Basic PSD properties increased to being comparable to the best liquid scintillators
EJ-276G with green fluorescence is also available for use with solid-state sensors.
PROPERTIES
EJ-276
EJ-276G
Light Output (% Anthracene)
56
52
Scintillation Efficiency (photons/1 MeV e-)
8,600
8,000
Wavelength of Maximum Emission (nm)
425
490
No. of H Atoms per cm3 (x1022)
4.546
No. of C Atoms per cm3 (x1022)
4.906
No. of Electrons per cm3 (x1023)
3.533
Density (g/cm3)
1.096
Approx. Mean Decay Times of First 3 Components (ns)
Gamma Excitation
13, 35, 270
—
Neutron Excitation
13, 59, 460
Chemical Compatibility
Attacked by: Aromatic solvents, Chlorinated solvents, Ketones, Solvent bonding cements, etc.
Stable in: Water, Dilute acids and alkalis, Lower alcohols, and Silicone greases.
It is safe to use most epoxies with these scintillators.