AW: Exposure Rate Formula for X-ray Machine

[Herwig Mandl <H.Mandl@lkasbg.gv.at>]

Dear Randy, in the German DIN 6812 You can find

H = C . exp(G1(z)) . 10**G2(z,U)
where
h doserate in mSv/mA in the distance of 1 m
z thickness of the filter in mm Al or Cu
z0 1 mm
U high voltage
U0 1 kV

and

G1(z)       -3.3 (z/z0)² for Al - filter
	   -9,1 (z/z0)² for Cu - filter

G2(z,U)     1,4 (z/z0) . log (U/U0)  for Al - filter
	     3,4 (z/z0) . log (U/U0) for Cu-filter

Herwig from Salzburg


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Von: 	Redmond, Randy R. (RXQ) [SMTP:RXQ@y12.doe.gov]
Antwort an: 	radsafe@romulus.ehs.uiuc.edu
Gesendet: 	Dienstag, 04. Jänner 2000 13:51
An: 	Multiple recipients of list
Betreff: 	RE: Exposure Rate Formula for X-ray Machine

The use is industrial.  I did not provide enough information in the original
question.  I am interested in a formula or formulas for estimating the
exposure rate in R/hour or R/minute at a specified distance from an X-ray
machine that uses the following variables:  kV, mA, tube to point of
interest distance, thickness and type of material making up the tube/filter.

Thanks,

Randy Redmond
Lockheed Martin Energy Systems
P.O. Box 2009
Bldg.  9769,  MS 8081
Oak Ridge, TN  37831-8081
Email:  rxq@y12.doe.gov
Phone:  423-574-5640
Fax:  423-576-6047

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