Search found 65 matches

by cicastol
26 Nov 2019, 00:17
Forum: General discussion
Topic: Mini Xray xrf
Replies: 14
Views: 417

Re: Mini Xray xrf

Steven Sesselmann wrote:
25 Nov 2019, 16:41
Taray,

If your tube outputs 15 keV x-rays and we assume a high Z target then your power supply is probably only giving you 15kV under load.
Hi Steven, the bremsstrahlung peak is roughly 1/3 of input voltage, so tube input should be in excess of 30kV.
by cicastol
25 Nov 2019, 00:18
Forum: General discussion
Topic: Mini Xray xrf
Replies: 14
Views: 417

Re: Mini Xray xrf

Mini xray xrf CUT I guess it is between 20 to 30 kvp Input voltage about 18 volts. Xray energy spectrum is a 15 kev single peak with no bestrahlung spread .This was measured by exploranuim 130 and scintillion detector. But enough for low energy XRF production less than 15 kev Hi, i think there is s...
by cicastol
24 Nov 2019, 23:47
Forum: Spectrum
Topic: The Stratospheric Thread - Radiation at Aircraft Altitude
Replies: 8
Views: 313

Re: The Stratospheric Thread - Radiation at Aircraft Altitude

Welcome back Massimo,
you made a great report, does playing with our toys on airplane generate some sort of suspicion? :-)
by cicastol
23 Oct 2019, 20:25
Forum: Shielding
Topic: Shield design, geometry, mass, etc.
Replies: 4
Views: 370

Re: Shield design, geometry, mass, etc.

Hi Ciro, wow that looks like lol (lots of lead) - 300-400kg? After doing some math my shield is not so much LOL (i thout was more heavy), maybe in the 180 kg range or less with the heavier part of 28kg, despite this relatively low amount of lead is highly effective . My first shield was a simple 2/...
by cicastol
21 Oct 2019, 04:27
Forum: Spectrum
Topic: Radioactivity in public
Replies: 8
Views: 426

Re: Radioactivity in public

its quite a bit of medically sensitive information you get, so so its a bit of an invasion of privacy to do this... Maybe for sure, but this can be valid also for the neighbor people who don't want being irradiated …. Here in Italy my mother, after scintigraphy with Tc99m, doctors said to not stand...
by cicastol
21 Oct 2019, 04:15
Forum: Spectrum
Topic: Cs137 Contamination in Italian Alps's Soil
Replies: 2
Views: 237

Re: Cs137 Contamination in Italian Alps's Soil

Nice work Massimo,
this weak sample is not an easy task ,yes more lead is needed but you did it!
Try to use the whole sample "wrapped" around the detector in a 4Pi geometry, doing this improve a lot the detection.
by cicastol
21 Oct 2019, 03:49
Forum: Shielding
Topic: Shield design, geometry, mass, etc.
Replies: 4
Views: 370

Re: Shield design, geometry, mass, etc.

Hi Stefan, if you wanna go for low activity samples route a proper shield is a must, 4Pi Marinelli geometry is essential and at least 5cm of lead all around is needed, i've found also that a "cap" over the detector improve the background/shielded ratio counts as well. I've made a modular shield of p...
by cicastol
18 Sep 2019, 06:19
Forum: Spectrum
Topic: Cs137 Italy
Replies: 6
Views: 688

Re: Cs137 Italy

photos of the trip
by cicastol
18 Sep 2019, 06:08
Forum: Spectrum
Topic: Cs137 Italy
Replies: 6
Views: 688

Re: Cs137 Italy

I've made a second bush airplane trip to collect soil on the Alps, the first sample was taken on a small flat,probably this accumulated and concentrated the rainfall during the Chernobyl fallout , causing an hot spot for 137Cs. The second sample wa staken 30meters away from the first place but on th...
by cicastol
18 Sep 2019, 05:50
Forum: Spectrum
Topic: Lutetium ?
Replies: 11
Views: 4392

Re: Lutetium ?

Hi Fer,
nice spectra!!
Yes my 3x3 is really outstanding in low end energy resolution, especially considering it is a big 3"x3" , something special happened under magical Luuk hand!