[ RadSafe ] Looking for a rather special low energy x-ray survey instrument .....

geoelectronics at rallstech.net geoelectronics at rallstech.net
Wed Dec 25 10:36:48 CST 2019

Ted, is the X-Ray source isotopic or electrically generated?
Counting or analyzing required?

For low energy photon work, I use CdTe, Si-PIN, with beryllium windows, sealed air and pressurized ion chambers, thin scintillation crystals (NaI(Tl), CsI), CaF2) CZT,  and even plastic scintillators- all fitted with X-Ray rated entrance windows.

George Dowell

----- Original Message -----
From: Ted de Castro <tdc at xrayted.com>
To: The International Radiation Protection (Health Physics) Mailing List <radsafe at health.phys.iit.edu>
Sent: Tue, 24 Dec 2019 18:19:15 -0500 (EST)
Subject: [ RadSafe ] Looking for a rather special low energy x-ray survey instrument .....

One problem with being retired is that I don't have the stacks of 
instrument catalogs near at hand as I used to!!  I'm not even sure who 
the players still are.

Anyhow - I'm looking for an ultra sensitive low energy x-ray survey 
instrument - therefore it would have to be a scintillator detector - I 
think CdTe would be best but I see CsI out there that seems to fill the 
bill.  It would, of course, need a thin window to detect x-rays down 
into the 10 keV region.

The Ludlum model-3019 looks like a good maybe - but I'd like to see 
more.  A detachable probe might be more useful.

Large area is not required and in fact could be a problem as we are 
trying to characterize small area x-ray leaks discovered with image 
plates (6 hour exposures) - but in real time.

Any suggestions??


Ted de Castro

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