the function of -70 for X-ray film

Mad Dan Eccles rpgrant at
Wed Nov 1 09:58:30 EST 1995

In article <199510281917.OAA13346 at>, nikolaic at VISAR.WUSTL.EDU (Nikolai Chitaev) writes:
>> I have a question to ask.   What is the real function of exposure
>> the p32 X-ray film in -70 c?
>> lili
> I guess that at -70oC your ENHANCEMENT SCREENs will reflect emmited 
> b-particles toward the film, so providing more energy otherwise being 

No.  The screen actually phosphoresces (or fluoresces); the b-particle hits 
the screen, a photon(s) of light then comes back and darkens the film.

Richard P. Grant MA DPhil      rpgrant at
Nuffield Department of Obstetrics and Gynaecology, University of Oxford.
"Winds light to variable"

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