SPI YAP Single Crystal Scintillator
The permanent scintillator replacement!
Converting from P-47?
If you select YAP, there is no need to change the PMT!
Yes, that is right, you pay a few dollars more for the scintillator,
but you save the cost of a PMT replacement.
Use YAP and no need to change the PMT!
The best of both worlds: Emission characteristics of a P47 - using the
same photomultiplier - plus the durability of the YAG! Made of yttrium
aluminum perovskite, the YAP single crystal is a breakthrough in the
light output efficiency. Its emitted spectrum peaks at 378nm (close to
the S-11's maximum sensitivity), meaning your SEM does not have to be
refitted with a more sensitive photomultiplier. And because the decay
time of the YAP crystal is faster than the YAG crystal (40ns vs. 80ns),
overall performance is significantly improved. All YAP scintillators should be aluminum
coated prior to use in an SEM application and therefore, the SPI YAP
scintillators come 50 nm aluminum coated as "standard", freeing the customer
from the burden of having to apply aluminum and not knowing for sure just
how much to apply. If a YAP is desired without the aluminum coating, be
sure to state that you want the scintillator uncoated.
But for many users, the real advantage of the single crystal scintillator
is that when compared to P-47, the useful life time is essentially forever, and
that is because of its high resistance to radiation damage. While we can not
guarantee it, far more often than not, the scintillator far outlives the useful
lifetime of the SEM.
Other important features
Excellent signal-to-noise ratio.
TV compatible with fast decay time (40ns).
High temperature tolerance, Bakeability to 400 °C.
Easily detects samples high in cathodoluminescence i.e. gallium arsenide.
Atomic number differences of 0.1 on object analysis.
Chemical Formula: YAlO3
Refractive index: 1.82
Bulk density: 4.551
Aluminum coated on polished side
Thickness Specifications: Thickness can be between 0.5 to 1.0mm,
because the thickness for SEM application is not important except where
specifically noted. For non-SEM applications where a more specific
thickness (e.g. 0.5mm) is important, add $ 75.00. Over the years,
we have developed a series of
Special Use Hints.
Just remember that not all scintillators come out of the same "shop"
and there is a wide difference in quality. And sometimes in price.
You can be sure that the SPI YAG scintillators are the very highest
quality available and are the same ones specified by many of the world's
leading SEM manufacturers. Still not seeing what you need in the way of
information? Try our Frequently
Asked Questions about YAG and YAP scintillators.
Just select the
scintillator and SPI # that is right for your microscope
and that is all there is to it!
To Ask a Question or Make a Comment
To Place an Order or Request a Quote
Return to:
Tuesday February 09, 2010
© Copyright 1996 - 
. By Structure Probe, Inc.
Contacting SPI Supplies and Structure Probe, Inc.
All rights reserved.
All trademarks and trade names are the property of their respective owners.
Worldwide Distributors, Representatives, and Agents
