6 Apr
2012
6 Apr
'12
8:55 p.m.
On 6 Apr 2012 at 23:04, Alexey Toptygin wrote:
you get 1/e attenuation for 14keV X-rays for every 400
microns of
aluminium, so it doesn't take much thickness to block them entirely.
At 25keV, you need about 2.2mm aluminium, but just 100 microns of iron
for 1/e attenuation.
I've got to do some reading--I remember that "aluminized" screens
started to be included in the 1950s. I wonder if that had to do with
X-rays.
--Chuck