[ RadSafe ] Fwd: Looking for vendor for "hard xray" spectormeter calibration source.

Chris Alston achris1999 at gmail.com
Mon Jun 29 18:59:31 CDT 2015

Xray Ted

Maybe when he says "hard", he means as nearly mono-energetic as possible.
Like, with a *copper* anode, you get the k-alpha and -beta x-rays, at ~ 8
and 9 keV.  Contrast that with the messy bunch of x-rays and a gamma, we
see from I-125 between ~ 25 - 35 keV.  If you give me a few days, I can
look up the similar, but uniquely different emissions from indium.  Am-241
does have a very useful mono-energetic gamma photon at 60 keV (~35%
intensity), but it seems as though that would be too high an E for what we
can divine of his uses.  Why not call a company like Rigaku (they're big in
x-ray diffraction), and ask them how they calibrate their detectors?

---------- Forwarded message ----------
From: Ted de Castro <tdc at xrayted.com>
Date: Mon, Jun 29, 2015 at 1:58 PM
Subject: [ RadSafe ] Looking for vendor for "hard xray" spectormeter
calibration source.
To: "The International Radiation Protection (Health Physics) Mailing List" <
radsafe at health.phys.iit.edu>
I looked in the journal and on the website for vendor data and was shocked
to see how few ads there were.  This seems like something to be concerned
Anyhow - I need to refer a client to what he refers to as a "hard" x-ray
calibration source for an x-ray spectrometer.  They specifically mentioned
an Am source and are looking for energies in the couple of 10's of keV (I
don't usually think of that low an energy as "hard").
I am trying to get more info on the spectrometer and its detector but
thought I'd start this query going now.  The x-ray source for the analyzer
is a high intensity Indium anode source - this may give you some idea of
what they want and is pretty much all I can say about it.  I think a vendor
or user in the area would recognize the need.

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