Forwarded mail....

[Bruce Busby <bbusby@umich.edu>]

Hi All,

Got a question that someone out there knows the answer. Thanks, as 
always.

Bruce Busby


---- Cut ----


From: jchesser@mindspring.com


I'm measuring the HVL on an Oldeleft superficial unit.
This unit has optional settings for changing beam quaility.
I'm looking for backscatter factor data (BSF) and f-factor
values (exposure to muscle dose conversion) for a HVL of 
12.7 mm Al. My sources only give values for HVL of Al up to
7 & 8 mm then changes to mm of Cu. I don't have Cu filfers.


Thankyou for your efforts in this web page. I use it often 
as a resource.


user: Jake Chesser, M.S.
org: Tanner Radiation Center
occu: Medical Physicist
place: Haralson County, GA