Abstract
For improving detection efficiency of 0.02-0.25 MeV neutrons by boron-loaded plastic scintillation detector (BLPSD), surrounding the scintillator with polyethylene moderator is feasible way. In this paper, the detection efficiency of a BLPSD with front and side PE moderators of different thicknesses is simulated by MCNP code, and the thickness-dependant detection efficiencies are given. The results show the side PE moderator of 80 mm thick increases the BLPSD detection efficiency of 0.02-0.25 MeV neutrons by a factor of about, but the front PE moderator decreases the detection efficiency. Finally, the design structure of BLPSD surrounded by side PE moderator can realize high detection efficiency for a wide spectrum is proved.
| Original language | English |
|---|---|
| Pages (from-to) | 599-603 |
| Number of pages | 5 |
| Journal | He Jishu/Nuclear Techniques |
| Volume | 34 |
| Issue number | 8 |
| State | Published - Aug 2011 |
| Externally published | Yes |
Keywords
- Boron-loaded plastic scintillator
- Detection efficiency
- MCNP
- Moderator