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

Ted de Castro tdc at xrayted.com
Mon Jun 29 20:39:59 CDT 2015

Thanks Chris,

Actually they/I have an Indium spectrum.  Their interests is to energy 
calibrate the spectrometer and mentioned energies around 40 keV.  And in 
their discussions - they think of these as high energy.  I guess it 
what's you are used to - having worked 40 years with high energy 
accelerators and diagnostic and orthovoltage x-ray and Co-60, Cs-137 or 
Ra-226 and alpha-n neutron sources ---- I have a different "high energy" 

Anyhow - what they want right now is a reference to a vendor who sells 
these sources - and they do want an Am.

I have yet to discern how large a source and can't get to work on their 
license until I have some idea what they will be getting.

Anyhow - right now - its the vendor I am looking for - SURELY - there 
are a few who see this list.

When I get more info on the spectrometer - then I can call that company 
and see what they recommend.  Right now I have the most info on the 
x-ray generator - just finished designing the interlock/safety/control 
system/enclosure and getting their state license.

ted de castro

On 6/29/2015 4:59 PM, Chris Alston wrote:
> 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?
> Cheers
> cja
> ---------- 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
> about!!
> 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.
> Thank-you
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