x ray stds

[Slaback@micf.nist.gov]

NIST x ray beam qualities range from 10 keV to
300 keV with varying amounts of filtration.
A few of the lower energy ones are ....
  Code   Added filter (Al)     HVL (mm Al)
  L10           0              .029
  L15           0              .050
  L20           0              .071
  L30         .265 mm          .22
  L40         .50  mm          .49
  M20         .23  mm          .152
  M30         .50  mm          .36
  H10         .105 mm          .048
  H15         .500 mm          .152
  H20        1.021 mm          .36
  H30        4.13  mm         1.23

Hopefully this data will be available via the NIST
home page (www.nist....) but I do not think it is
there yet.

A little risk adds spice to life.
slaback@MICF.NIST.gov