Bulk attenuation length (click here) is for material as cast before any machining. Attenuation length for finished parts is dependent on thickness, final machining and reflector.
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FAQs
To search the Frequently Asked Questions (FAQs), enter your search terms or questions in the box below. You can also select a Product Category using the dropdown menu below. If you are unable to find the answer to your question in the FAQs, please feel free to Contact Us hereCurrently, there is the same 227Ac background for both Lanthanum Bromide [LaBr3(Ce)], and Enhanced Lanthanum Bromide [LaBr3(Ce+Sr)]. This background has a maximum level around 0.2 – 0.15 Bq/cc for these alpha emitters (227Ac).
But, it’s important to note that the position of this background is not at the same location in the spectrum for Enhanced Lanthanum Bromide compared to standard Lanthanum Bromide: For Lanthanum Bromide, the 227Ac background is between 1.6MeV et 2.7MeV, and the same background is between 2.5MeV to 3.8MeV for Enhanced Lanthanum Bromide: Depending on the application, the background may be outside the interest range.
It is important to mention that we have 2 categories of designs for these high resolving materials: Premium designs and Compact designs.
The premium designs are full oriented for the best spectroscopy performances (the best energy resolution) and usually use a larger PMT compared to the cross section of the crystal.
The Compact designs use a smaller PMT and provide the best compromise between energy resolution and outer mechanical dimensions.
If we compared equivalent Premium designs for these different materials (with standard dimensions from 1.5”x1.5” to 3”x3” for example), a product with a Lanthanum Bromide scintillation crystal will provide a guaranteed PHR @ 662keV <3.0% (with average values around 2.7%); when an Enhanced Lanthanum Bromide scintillation crystal will provide a guaranteed PHR @ 662keV <2.5% (with typical values at 2.2-2.3%).
For equivalent design, the CLLB scintillation product will have a guaranteed PHR @ 662keV <4,5%. To illustrate this last value, we can refer to a 2019 production of more than 100 units with 2” diameter X 4” long CLLB scintillation crystal: all products have been delivered with a PHR @ 662keV <4.5% and the average value for these units was at 4.03%.
Most of the B14 electronic bases available on the market have been designed at first for 10 stages PMTs.
Due to the specific characteristics of Enhanced Lanthanum Bromide and Lanthanum Bromide scintillation products (high light output, fast decay time…), all PMTs which have been selected for use with these materials, have only 8 stages.
To solve this mismatch between B14 electronic bases from the market on one side, and Enhanced Lanthanum Bromide / Lanthanum Bromide scintillation products, we are able to provide “pin adapted” versions with a specific B14 layout. This specific layout makes the 8 stages PMT fully compatible with 10 stages B14 electronic bases.
For specific B14 electronic bases already designed for 8 stages PMTs, no need of “pin adapted” layout.
We have been manufacturing Lanthanum Bromide products since 2006. Today, our largest standard dimension is 3” diameter x 3” thick, but upon specific request we can supply a larger diameter (up to 5”) and a longer length (up to 8”).
For Enhanced Lanthanum Bromide material, we use our knowledge and competencies that have been developed with our standard Lanthanum Bromide. Then, today we are able to provide scintillation products with large Enhanced Lanthanum Bromide crystals: 3” diameter x 3” thick standard dimensions and we can provide, upon request, scintillation product with crystal up to 3” diameter x 4” thick.
Plastic scintillator is good from -40°C to about +65°C, at 70°C it will be start to soften, so to be safe, we recommend 65°C as a max working temperature.
The photomultiplier tubes typically integrated in a scintillation detector assembly have an operating temperature range of -20°C to +50°C. However, a finished detector assembly has a temperature range of +4°C to +43°C or normal laboratory environment. See warranty for complete description.
In most cases, Saint-Gobain can offer a packaged scintillator + photosensor solution optimized for performance and cost. Exceptions to the policy are reviewed on a case by case basis.
Customer will specify their exact ballistic threat needs. What we offer is that for whatever the threat protection request may be, a sapphire solution will be half as thick and half the weight of any glass solution meeting the same threat protection. Sapphire is only used for higher levels of protection such as NIJIII-NIJIV and STANG levels. Refer to SAFirE Transparent Armor product sheet.
Refer to the Operation & Handling section of our Resource library - search Warranty