Geophysical Scintillation Crystals

Geophysical Scintillation Crystals

Our geophysical crystals have been designed to withstand high temperatures and challenging operational conditions. As with our standard crystals, they are made of sodium-iodide doped with thallium (NaI(Tl).

NaI(Tl) scintillators are an excellent option for radiation detection as they provide the greatest light output and very good energy resolutions with competitive price points. We grow our geophysical scintillation crystals in-house at our factory.

Technical specifications

Material: Sodium-Iodide doped with Thallium (NaI(Tl))
Diameter range:12 mm to 50 mm (0.47 in to 1.97 in)
Length range:13 mm to 250 mm (0.51 in to 9.84 in)
Temp range: Designed for operational temperatures from +90˚C to +180˚C (+194˚F to +356˚F)
PHR:Our geophysical scintillation crystals have a general PHR value of 7.00–10.00% for Cs-137

If you don’t require scintillation crystals that have been specifically designed for geophysical use, you may want to consider our standard scintillation crystals which are available in different types and size ranges and are built for different target operational temperatures.


We pride ourselves for our quick and friendly customer service. Let us know what your needs are and we will tell you how we can deliver the solutions. Contact us to start the discussion!

Our geophysical scintillation crystals are particularly suited for borehole logging, well logging, mineral, oil and gas exploration, and other types of environmental and geothermal study.


Depending on your specifications, we can ship geophysical scintillator crystals blank or with metal housing.

Blank shipping: Scintillators are individually wrapped into hermetically sealed foil wrapping.

Housing types: Hermetically sealed aluminium, stainless steel and titanium housing types available.

We can deliver geophysical scintillation crystals anywhere in the world. Expedited manufacturing and shipping options are usually available if you need the product quickly.

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    Type of crystals: Solid cylindrical geophysical NaI(Tl) crystal

    Target operational temperature

    Crystal diameter

    Crystal length

    Dimensions given below refer to



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