SCINTILLATION PROBES 

ALPHA &/or BETA

Scintillation Probes:
 

PAS-8 Alpha Scintillation Probe with 1-3/4" diameter x 
0.8 mg/cm$^{2}$ window. For use wherever a high efficiency, 
low background alpha detector is indicated. (Figure 1)

PAS-9 Alpha Scintillation Probe with a 4-1/2" diameter x 
0.8 mg/cm$^{2}$ window. The 100 cm$^{2}$ face of this probe allows 
rapid surveys to be made of personnel, equipment or 
flat surfaces. Background is in the order of several 
counts per hour. Sensitivity is 10 to 20% for 5 MeV. 
alphas based on 4$\pi $ geometry (20 to 40% based on 2$\pi $ 
geometry). The protective grid is physically separated 
from the window thus making contamination of the window 
extremely unlikely. Grid may be removed for cleaning 
without disturbing the window. some sacrifice of 
sensitivity has been make for this feature. (Figure 2)

PAS-9R Similar to PAS-9, Sensitivity Area: 125cm$^{\textrm{2}}$. 
Net Open: 100cm$^{\textrm{2}}$.
Rectangular FACE: 5.5" x 4" Gross. (Figure 3)

PBS-42 Identical to the PBS-44 except that the 
sensitive diameter is 1.5". (Figure 2)

PBS-43 Beta Scintillation probe. 0.020" Phosphor 
organic. 3.75" diameter gives a 45 cm$^{2}$ sensitive area. 
(Figure 2)

PBS-44 Beta Scintillator for rapid monitoring of large 
surfaces as well as for measuring activity on filter 
paper in high volume air samplers. Sensitive diameter 
is 100 cm$^{2}$. Detects betas with energies greater than .05 
MeV. The window is normally protected by a 79% open 
grid. Optionally, a cap is furnished to exclude all 
betas of 2.5 MeV or less. 

PBS-44R Similar to PBS-44 Sensitivity Area: 125cm$^{\textrm{2}}$. 
Net Open: 100cm$^{\textrm{2}}$.
Rectangular FACE: 5.5" x 4" Gross. (Figure 3)

PABS-42 Alpha plus Beta Scintillation Probe, ZnS(Ag) 
Alpha Phosphor laminated onto 0.010" Phosphor organic 
Beta Scintillator. 15 cm$^{2}$ sensitive area probe has 2" 
outside diameter. (Figure 2)

PABS-47 Alpha plus Beta Scintillation Probe, ZnS(Ag) 
Alpha Phosphor laminated onto 0.010" Phosphor organic 
Beta Scintillator. 0.010" Phosphor organic. 100 cm$^{2}$ 
sensitive area. (Figure 2)


<Graphic file:PAS-8img-02.ps>

Figure 1
 
  
 
<Graphic file:pas-9-03.ps>

Figure 2
 
 
 
<Graphic file:bgs-img.jpg>

 Figure 3

T$_{\textrm{A}}$                                   TECHNICAL ASSOCIATES                                   
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