Xe-133 HVL

["Les Slaback, Health Physics" <SLABACK@micf.nist.gov>]

The ABHP Part 1 panel is always on the lookout for good new questions for
the Part I exam.  The Xe-133 discussion has presented several neat twists
that would make good questions.  e.g.:
   - effective HVL when there are 2 photons
   - effect of collimation when the primary reaction is photoelectric

Send suggestions to Morgan Cox.
Keep this in mind for other topics that pop up.

SLABACK@MICF.NIST.GOV
   ...a little risk, like a bit of spice, adds flavor to life