SCINTILLATION PROBE

NEUTRONS([fig] 
 Figure 1
) 

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/cm^{2}/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)















T_{\textrm{A}}                                   TECHNICAL ASSOCIATES                                   
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