BC-523, BC-523A

Boron Loaded

BC-523 liquid scintillator contains natural boron (19.7% 10B) and BC-523A contains boron enriched in 10B to a minimum of 90%. Both liquid scintillators are useful for total absorption neutron spectrometry and have excellent pulse shape discrimination properties for neutron-gamma separation.


A fast neutron will produce a prompt recoil proton pulse with its initial scatterings in the liquid. Neutrons that are sufficiently thermalized within the scintillator are likely to undergo the 10B (n, a) capture. The capture pulse is in delayed coincidence with the prompt pulse and is used to identify neutron events. For neutron energies below 200 keV, the capture time constant is determined solely by the 10B concentration. The average capture time is 1.4 microseconds for BC-523 and about 0.5 microseconds for BC-523A.


BC-523 and BC-523A are supplied sealed in ready-to-use glass or metal cells.

  • Bulk: 1 Liter, 1 gallon (3.8 liters), 5 gallons (19 liters), 25 gallons (95 liters) and 55-gallon quantities.
  • MAB or MVB metal cells with typical 1"x1", 2"x2", 3"x3" & 5" diameters x 5" depth
  • VB-1, TPB-1, HB-1 glass cells: 1.5"x1.5", 2"x2" and 3" diameter x 3" depth


Scintillation Properties BC-523 BC-523A
Light Output, %Anthracene 65 65
Wavelength of Maximum Emission, nm 425 425
Decay Time, short component, ns 3.7 3.7
Bulk Light Attenuation, meters >4 >4
Atomic Composition    
No. of H Atoms per cc (x1022) 4.97 4.98
No. of C Atoms per cc (x1022) 2.86 2.86
No. of O Atoms per cc (x1022) 0.808 0.811
No of 10B Atoms per cc (x1022) 0.053 0.243
No of 11B Atoms per cc (x1022) 0.216 0.027
Data Sheets

BC-523A Boron-loaded Liquid Scintillators

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Data Sheets

BC-523 Boron-loaded Liquid Scintillators

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