Scintillation Probes (Neutrons):
- PNS-19 Fast Neutron Scintillation Probe insensitive to gamma
radiation in fields below 100 R/hr. The n-p reaction is used to measure
energy deposited by neutrons. A shaped light pipe and moderator about
the ZnS.Ag phosphor gives a consistent Rem to count ratio for incident
neutrons 1/4 MeV and above, within ± 30% . (Figure 1)
- PNS-20 Slow Neutron Scintillation Probe. Thermal neutrons are
detected by means of the boron n-alpha reaction. Probe delivers
approximately 60 cpm per neutron/cm2/second and requires a
900 volt supply. The probe is 8'' long x 2'' in diameter. It is
completely insensitive to gammas in fields below 10R/hr. To measure fast
neutrons, use the PNS-19 probe. (Figure 1)
|
Figure 1
|