Strontium Iodide scintillation

Srl2(Eu) - Strontium IodideHigh Resolution / Low Background Scintillators

Europium doped Strontium Iodide scintillators feature very high light yields and excellent performance over a broad range of energies. SrI2(Eu) crystals are hygroscopic, relatively slow, and inherently free of intrinsic radioactivity. Srl2(Eu) scintillators are available from BNC encapsulated with an entrance window, integrally coupled to a light sensor such as a PMT or SiPM, or fully integrated in detector assemblies with light sensor and front-end electronics. 

Contact BNC for more information or to discuss your application. You can also tell us about your requirements by completing our brief detector Survey.

Overview

Overview 

SrI2(Eu) crystals are extremely bright and feature excellent proportionality. The material performs very well at both high and low energies. Typical energy resolutions are 3.5% FWHM for 662 keV and 6% FWHM for 122 keV. Srl2(Eu) is also quite radiopure. Due to its intrinsic self-absorption, the crystal requires special surface preparations techniques. Its long decay time requires long digital shaping time constants (>10 us) which can complicate high count rate behavior. The self-absorption limits the maximum size of the crystal to approximately 4 cm. 

Specifications 

Specifications

Density [g/cm3]

4.6

Hygroscopic

Yes

Wavelength of emission [nm]

400-480

Refractive index @ emission max

1.85

Decay time [μs]

1-5 (size dependent)

Energy resolution [%] @ 662 keV

Approx. 3.5 %

Light yield [photons/keV γ]

80

Photoelectron yield [% of NaI(Tl)] (for γ-rays)

120-140

Ce concentration

2 mol %

Typical Energy Resolution for 38 x 38 mm crystals

Energy

Resolution

59.5 keV

10%

122 keV

6%

356 keV

5%

662 keV

3.50%

1332 keV

3%

2600 keV

2.50%

Thorium spectrum of 38 x 38 mm SrI2(Eu) detector

Cs-137 spectrum of 38 x 38 mm SrI2(Eu) detector

Accessories  

Free Online Training Module - An Introduction to Scintillation Crystals and Detectors

Visit our Training page to access the module or for more information

Downloadable Resources 

Downloadable resources such as datasheets, firmware, software, drivers and products manuals. Alternatively, you can browse resources directly by visiting our downloads page.

Product Datasheets
• Product Firmware
• Product Software and Drivers
• Product Manuals

Media

Media 
Video URL 
Video title 
An introduction to Scionix Holland...
Video URL 
Video title 
Planning your Custom Scintillator ? An overview !
Video URL 
Video title 
Compton Suppressors: Practice and Theory Webinar