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BC-470
Tissue Equivalent Plastic Scintillator
General Description
BC-470 tissue-equivalent plastic scintillator responds to both betas and photons. It simulates tissue dose due to the electrons and high energy photons. Detector assemblies made with BC-470 are used as hand-held probes.
General Technical Data
| Base |
Polyvinyltoluene |
| Density |
1.037 |
| Atomic Ratio, H/C |
~1.1 |
| Refractive Index |
1.58 |
| Coefficient of Linear Expansion |
7.8 x 10-5 below 65°C |
| Softening Point |
65°C (149°F) |
| Light Output |
At +60°C = 95% of that at +20°C; independent of temperature from -60°C to +20°C |
| Vapor Pressure |
May be used in a vacuum |
| Solubility |
Soluble in aromatic solvents, chlorine, acetone, etc. Insoluble in water, dilute acids, lower alcohols, silicone fluid, grease & alkalis. |
Physical Constants
| Light Output |
46% anthracene |
| Rise Time |
0.9 ns |
| Decay Time |
2.4 ns |
| Wavelength of Maximum Emission |
423 nm |
| No. of H Atoms per cm3 |
5.19 x 1022 |
| No. of C Atoms per cm3 |
4.73 x 1022 |
| Ratio H:C Atoms |
1.098 |
| No. of Electrons per cm3 |
3.38 x 1023 |
| No. of As Atoms per cm3 |
5.43 x 1023 |
References
- "A Portable Beta Spectrometer for Tissue Dose Measurement," D.E. Martz, B.L. Rich and L.O. Johnson, EG? Idaho, Inc., Idaho National Engineering Laboratory
- "Field Tests of a Tissue-equivalent Beta Survey Meter," D.E. Martz, B.L. Rich, L.O. Johnson and S.H. Daniel, EG? Idaho, Inc., Idaho National Engineering Laboratory
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