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Low Energy X-rays



Greetings all,



On the low end of the energy spectrum, at what kVp would you start being

concerned about x-ray exposure? I've been trying to find HVLs for extremely

low energy x-rays and have been unsuccessful. I mean, hydrogen ionizes at

13.6 eV, but survey meters are only sensitive down to around 8 keV. How do

you do heath physics below that energy? Sheet rock seems to be an adequate

shielding for dental x-ray energies (considering their short exposure times)

but what about a steady state field of 10 kVp x-rays where you can't add

extra shielding? Where's the 5 mR/hr line?



Any help would be appreciated. Thank you in advance.



Donald P. Mercado	

Radiation Safety Officer

Explosives Safety Officer

Lockheed Martin Space Systems Company

O/EK-20, B/157

1111 Lockheed Martin Way

Sunnyvale, CA 94089

Ph. (408) 742-0759

Fx. (408) 756-0504

Don.Mercado@lmco.com



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