RE: Transmission data for I-131 through steel

["Broseus, Roger (OD)" <rbroseus@exchange.nih.gov>]

Johnathon,

You might try taking a look at NCRP Report No. 49, "Structural Shielding Design
and Evaluation for Medical Use of X Rays and Gamma Rays of Energies up to 10
MeV."  In Figure 13, transmission curves are given for iron for some other
radionuclides and you might interpolate a bit, combining this in for with
commonly/commercially available thicknesses of iron to come up with an answer.
There are also some references at the bottom of the figure.  A better
alternative would be to use the software Microshield from Grove Engineering, if
you could lay your hands on it.  As I recall, they have parameters for several
radionuclides, including I-131, that enable shielding calculations.

Best of luck

/Roger W. Broseus

	-----Original Message-----
	From:	Jonathon Thwaites [SMTP:jonathon@physics.uwa.edu.au]
	Sent:	Thursday, December 17, 1998 4:01 AM
	To:	Multiple recipients of list
	Subject:	Transmission data for I-131 through steel

	Has anyone got transmission dat for I-131 through steel out there please

	Cheers
	Jonathon Thwaites
	Senior Radiation Physicist
	Department of Medical Technology and Physics
	Sir Charles Gairdner Hospital
	Nedlands 6009
	Western Australia

	phone:	93846098
	fax:	93463466
	email:	jonathon@earwax.pd.uwa.edu.au

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