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Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
radhoo wrote ...
Hi Stella!
I was wondering if you managed to invest more time into this , for some additional progress?
Hi there Radhu - yes, I found that a conventional old-fashioned school electroscope could lose charge and so detect 2 keV photons, though as ranges grow shorter it becomes difficult to prevent interaction between the photon source housing and the charge plate.
Despite the obvious problem with air humidity/insulator leakage, I found the electroscope good for making relative measurements, so long as the experimental conditions are kept as nearly identical as possible.
A radiating 2X2 makes the leaves collapse in a second or two!
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Hi everyone, has anyone tried using PG (pyrolytic graphite) as a window material, if it is transparent to alpha particles then X-rays should go right through it.
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Conundrum wrote ...
Hi everyone, has anyone tried using PG (pyrolytic graphite) as a window material, if it is transparent to alpha particles then X-rays should go right through it.
-A
Graphite is commonly used in the walls and windows of ionization chambers - especially the Farmer type chambers used in therepeutic dosimetry. Pure carbon is very helpful here because its X-ray fluorescence - its characteristic K emission - has an energy of only 277 eV, and so - for all practical purposes - can be discounted from the radiological picture of what is going on in and around the Farmer probe for all practical purposes.
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Life Below 5 keV
