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RE: In-111



We have recently calculated skin doses for several nuclides of interest
here. We are using the Varskin program to perform these calculations after
adding our site specific nuclides. For In-111, 1 uCi point source, the beta
dose rate is 233 mrad/h, the gamma dose rate is 84 mrad/h. For a two
dimensional source of 1 cm^2, all other parameters same as above, the beta
dose rate is 245 mrad/h. All dose rates are averaged over a 1 cm^2 area.

For In-111, the shallow dose is due to conversion electrons as there are no
betas. Varskin allegedly overcalculates the dose from conversion electrons
but I do not have a value for this.
********************************************************
********************************************************
Roger Moroney
Technical Director - External Dosimetry Program
Health Physicist
Mallinckrodt
wrmoroe@mkg.com
314.654.7457 voice
314.654.7571 fax

> ----------
> From: 	Jim Abraham[SMTP:jimabe@lamar.colostate.edu]
> Reply To: 	radsafe@romulus.ehs.uiuc.edu
> Sent: 	Friday, July 10, 1998 11:25 AM
> To: 	Multiple recipients of list
> Subject: 	In-111
> 
> Dear Radsafers:
> 
> I'm looking for information on In-111.  Gamma Ray Constant and Skin Dose
> Conversion Factor if there is one.  So far, I've had trouble locating
> this info.  Could someone help me out.  Thanks in advance
> 
> --
> <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
> James P. Abraham
> Alt. Radiation Safety Officer
> Radiation Control Office - Colorado State University
> 133 General Services Building - Fort Collins, Colorado 80523-6021
> 
> Phone:  (970) 491-3928    Fax:  (970) 491-4804
> Email:   jimabe@lamar.colostate.edu
> <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
> 
>