6 Apr
2012
6 Apr
'12
6:40 p.m.
On Fri, 6 Apr 2012, Chuck Guzis wrote:
On 6 Apr 2012 at 23:04, Alexey Toptygin wrote:
I doubt it - aluminium is not the best X-ray absorber. Lead (and leaded
glass) is much better.
Alexey
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.