BORON LOADED
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 |
