Gamma Scintillation Probes

What type do I need? Should I get  1X1 or a 2X2 scintillation probe? What connectors are available? SE International can help you find just the right probe for your application.

Typically, crystals are grown to order once we find the right one for your needs. Below are the specifications for the most common detectors that we offer in this variety.

NaI(Tl), or Sodium Iodide, crystal is recommended for nuclide identification in room temperature application. It provides the best energy resolution for gamma rays in this environment and is relatively inexpensive. Sodium Iodide probes are available in a wide variety of sizes.

The CsI (Tl), or Cesium Iodide, crystal used in Radiation Alert® Probes has a higher atomic number, is more rugged, and less hygroscopic than a typical Nal detector. The improved gamma ray absorption allows a thinner crystal to be used, effectively reducing the background count rate.

Scintillation Probes

CsI (Tl) Probes

CsI (Tl) crystal (Cesium Iodide Thallium)
Typically 1.0″ dia x 1.0″ thick (25.4 x 25.4mm)

Sensitivity

>180,000 CPM/mR/hr

Radiation Detected

Gamma 8 keV to 3 MeV.
Typical Absorption 70% at 600 keV, 50% at 840 keV

Probe Construction

Anodized aluminum housing. Approximate size: length 7-7.5 inches, diameter 1.5 inches. Cable (Optional)-Straight RG59/u, length 3.5 feet.

Temperature Range

-25°C to 40°C (-4°F to 104°F)

Humidity Range

0 to 90% Relative Humidity.

Weight

Approx. 290 g (10.25 oz.) without cable

Warranty

One year limited.

Nal(Tl)Probes

1 Inches X 1 Inches
2 inches X 2 Inches
Smaller and larger custom sizes available.

Sensitivity

>180,000 CPM/mR/hr (137 Cs)

Scintillator

Nal(Tl) Standard. Optional Extra: BGO, Cs(Tl) or (Na), TSO. Contact for more info.

PMT

2″ diameter magnetically shielded

Entrance Window

Aluminum 219 mG/cm2

Transmission

2% at 8KeV, 17% at 14.4KeV, and 94% at 60KeV

Energy Range

60 KeV ~ 2 MeV

Sensitivity

Typically 90,000 cpm/µSv/h (Cs137)

Operating Voltage

500V – 1200V

Connector

C-Connector standard with user specified option for SHV or MHV

Dynode String Resistance

> 100 Megaohms

Warranty

1 Year Limited