NIST beta cal

[Les Slaback <lester.slaback@nist.gov>]

I've been corrected.
Calibrating a source for 2Pi beta emission is now a 'standard' service.
See www.nist.gov.
I will let you decide if it is 'cheap'.  It all depends on your needs.
And to clarify, beta standards available as SRMs certified for activity
content are liquid (in sealed vials to state the obvious), not solids.
Disclaimer:  the above are the personal musings of the author, and do not
represent any past, present, or future position of NIST, the U.S. government,
or anyone else who might think that they are in a position of authority. 
Lester Slaback, Jr.  [Lester.Slaback@NIST.GOV] 
NBSR Health Physics 
Center for Neutron Research 
NIST 
Gaithersburg, MD  20899 
301 975-5810
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