Variable energy x-ray sources

[R.Ryder@dl.ac.uk]

Amersham International have stopped the sale of variable energy x-ray 
sources.
Their subsidary in the US cannot supply them either. They contained 37 MBq
of Am241 and a variety of targets (Cu, Rb,  Mo, Ag etc) which produced 
x-rays
from 8 to 44 keV. These sources are widely used for setting up solid state
detectors at synchrotron radiation laboratories.

Does any other manufacturer make similar sources?

Roy Ryder

Daresbury Laboratory, UK