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BORON LOADED

EJ-309B

 

EJ-309B

 

EJ-309B is a variant of EJ-309 loaded with natural boron. Loadings up to 5% by weight of natural boron are available. EJ-309B has most of the same general properties as EJ-309. The atomic compositions of three different loading levels are given below.

 

PROPERTIES EJ-309B-5%
EJ-309B-2.5%
EJ-309B-1%
Natural Boron Content (% w/w) 5 2.5 1
Light Output (% Anthracene) 57 64 69
Scintillation Efficiency (photons/1 MeV e-
8,800 9,800 10,600
Wavelength of Maximum Emission (nm) 424 424 424
Decay Time, Short Component (ns) ~3.5 ~3.5 ~3.5
Bulk Light Attenuation Length (m) >1 >1 >1
Specific Gravity 0.963 0.964 0.965
Refractive Index 1.57 1.57 1.57
Flash Point (°C) 144 144 144
Boiling Point (°C at 1 atm) 290-300 290-300 290-300
Vapor Pressure (mm Hg. at 20°C) 0.002 0.002 0.002
No. of H Atoms per cm3 (x1022) 5.40 5.43 5.44
No. of C Atoms per cm3 (x1022) 4.13 4.25 4.33
No. of 10B Atoms per cm3 (x1020)
5.34 2.68 1.07
No. of Electrons per cm3 (x1023) 3.16 3.17 3.17
10B/H Ratio of Linear Attenuation
Coefficient for Thermal Neutron Capture
125 62.4 25.1

 

EJ-309B Emission Spectrum