Revisions to the high-Z impurity correction table

[Tom Banks <tbanks@socrates.berkeley.edu>]

Dear MuCappers,

I have just posted a memo on my homepage which describes my revisions to
Peter's longstanding table of numbers pertaining to the high-Z impurity
correction:

  http://weak0.physics.berkeley.edu/weakint/research/muons/private/tbanks_dir/Documents/high-Z-table-revised.pdf

I still have to finalize some literature references, but the body of the
document is essentially complete and ready for inspection.

As you will see, the changes to the values of the important quantity
(delta r)/Y are not large, but they are large enough to affect the size of
our high-Z correction for Run8 by roughly 1.5 Hz.  I would greatly
appreciate it if you could find the time to peruse the document and see if
it all make sense.  I think it is especially important that Steve and
Peter K. inspect the calculations so that we can establish a consensus on
the table's values.

Regards,
Tom