NaI(Tl) Scintillators

NaI(Tl) Introduction:

Sodium Iodide crystals doped with Thallium (NaI(Tl) are not new to the industry and are  the most widely used scintillation material in the World. NaI(TI) scintillators are used traditionally in nuclear medicine, environmental measurements, geophysics, and medium-energy physics.


The NaI(Tl) Advantage:

Simply put, when properly housed in a hermetically sealed and specially designed stainless steel casing designed to withstand vibration, shock and issues associated with temperature expansion NaI(Tl) crystals make remarkable scintillators.

NaI(Tl) crystals have been used in industry for a very long time and has up until recently been the crystal of choice used in today's gamma ray scintillation down-hole logging tools. This is mainly due to NaI(Tl) crystals having the highest signal rating over other traditional crystals such as CsI(Na) and CsI(Tl):

comparison count of NAL(Tl) to other types

NaI(Tl) Scintillation Specifications:

Casing MaterialAluminiumStainless SteelTitanium
ShapeSquare or CylindricalCylindricalCylindrical
HeadNone ThreadedNone ThreadedThreaded
Temperature-35C to 50C (-31F to - 122F)-35C to 175C (-31F to - 347F)35C to 175C (-31F to - 347F)
VibrationNot recommended to be used in vibration environmentsRandom 5g 50-500Hz 15 minute duration per axis; 2 axis totalRandom 30 g 30-1000Hz 30 minute duration per axis; 2 axis total
Max Emission (nm)415415415
Refractive Index1.851.851.85

*MWD "measurement while drilling"

NaI(Tl) Scintillator Common sizes and part-numbers:

TypeShapeOutside Casing SizePart No.
RegularCylindrical1" (25.4 mm) x 1" (25.4 mm)FPNAR-100-500
RegularCylindrical2" (25.4 mm) x 2" (50.8 mm)FPNAR-200-200
RegularCylindrical 3" (25.4 mm) x 3" (76.2 mm)FPNAR-300-4500
RuggidizedCylindrical1" (25.4 mm) x 5" (127.0 mm)FPNAS-100-500
RuggidizedCylindrical1" (25.4 mm) x 6" (152.4 mm)FPNAS-100-600
RuggidizedCylindrical1" (25.4 mm) x 6.5" (165.1 mm)FPNAS-100-650
RuggidizedCylindrical1.25" (31.75 mm) x 5" (127.0 mm)FPNAS-125-500
MWDCylindrical1" (25.4 mm) x 5" (127.0 mm)FPNAT-100-500
MWDCylindrical with Threaded Head1" (25.4 mm) x 5" (127.0 mm)FPNAT-100-500
MWDCylindrical1" (25.4 mm) x 6" (152.4 mm)FPNAT-100-600
MWDCylindrical with Threaded Head1" (25.4 mm) x 6" (152.4 mm)FPNAT-100-600
MWDCylindrical1.25" (31.75 mm) x 5" (127.0 mm)FPNAT-125-500
MWDCylindrical with Threaded Head1.25" (31.75 mm) x 5" (127.0 mm)FPNAT-125-500
NaI(Tl) Scintillator Ordering and Custom Sizes:

FlashPoint can manufacture to meet your custom diameter and length requirements. To learn more and to place an order please contact us.

NaI(Tl) Scintillator Packaging:


FlashPoint takes great care in shipping your order to you.  Each scintillator is packaged individually inside tough industrial strength tubes that you can later re-use to ship or store other valuable components.

NaI(Tl) Scintillator Delivery Terms:

Please contact us to confirm current inventory and to confirm delivery date based on size of order and location of delivery.  We do accept transportation on your shipping account.

NaI(Tl) Scintillator Warranty:

FlashPoint provides a 1 year "no-nonsense" limited warranty on its Scintillator Products