In a message dated 4/1/00 10:33:00 AM Pacific Daylight Time,
[EMAIL PROTECTED] writes:
<< I have some naive questions :
I would like to hear exactly what is on my powder pattern:
- Kalpha3
- tube tails
or both ?? >>
You probably will not know until you have made sure in what condition your
tube is. While the impression may have been created that the effects of
electron defocussing are a 'given' for any diffraction tube, one should
realize that the extent of this effect is highly dependent on tube age, type
of tube (long/short-fine or normal focus), tube power setting and last not
least tube workmanship (=manufacturer). I strongly suspect that the effects
are negligible (if at all detectable) on a top of the line tube (like
Philips/Holland) when the device is still within its useful life cycle and
well conditioned.
L. Keller
