In-Reply-To: Message of Fri, 9 Jun 95 13:54:20 -0500 from<p.fundarek@utoronto.ca>
I have measured values for the HVL of Xe-133 to be ~ 0.25 mm Pb. These
were fairly good geometry (come'on guys, now don't go academically ballistic
on me). The 0.4 mm Pb values in print may be conservative due to the
"lawyer" factor.