Last week we went on down to Oak Ridge and looked at the various museums and other displays there. Missed meeting Paul Frame of on-line CDV museum fame, at...
All my items are available direct now LENi Geiger Counters......$99.00 GEO-210 Pancake Probes .......$109.00 Pancake tubes............................$79.00 ...
What are some good values for the 200V caps in a scintillator (2- wire probe configuration) dynode string circuit? And how much of a signal improvement are...
My opinion would use only 2 or 3 kV capacitors in any position. Further I use only the one cap in both 12 and 14 pin tube bases with great results and have...
Regarding how many people/institutions are a bit more nervous these days about those who seek to aquire hot stuff, I noticed an approach in the UK to a...
Fe-55 disc sources are now available for a reasonable investment (125.00 USD new), and have 100 uCi activity which is the maximum allowed. The emission is...
... The K-edge of lead is 88 keV. The L edges are all in the 13-16 keV range, so a 6 keV photon will not have enough energy. It simple is not possible. ... It...
Finally found one reference, and it says the K shell binding energy for lead is 88 keV and further states that this is the energy needed to remove the electron...
During the EC process, an electron usually from the K shell is pulled into the nucleus and "captured". This in and of itself creates no radiation besides the...
... Both a proton and an electron have the same magnitude charge, with opposite polarity of course. The mass of a proton is much more massive than an electron,...
OK I get it. Thanks. The erronious info was removed to keep confusion down... I still have a long way to go and much to learn on this subject.Info is getting...
I sometimes see gas proportional probes on ebay that fit something I want, but I don't bid because I don't know how they work, and so not sure if the gas gets...
some use air as the gas, can need voltages as high as 2500, deopending upon altitude. Others use a mix of 90 percent argon and 10 perceent methane (P10), and...
A few more points: 1) Some proportional ion chambers are sealed. The argon gas itself isn't used up and they don't have to be "quenched" the way GM tubes do. ...
XRF and related PIXE are very interesting procedures used to detect various elements by exciting them with either X-Ray ( as in XRF for X-Ray florescence) or...
for P-10= 12.8 percent For P=5= 10.1 percent @ 5.0 keV. from "Radiation Detection and Measurement" by Knoll, the "bible" for rad info. Geo ... chamber ... ...
Konny, A simple question without a simple answer ;) It takes about 26eV of energy for an electron or xray to create an ion pair in argon. Divide the particle...
Thanks, Geo, I don't have a copy fo the "bible" at the house. Craig ... for ... in a ... can ... and ... see ... used ... GM ... charge ... family ... and ... ...
I was looking for a simple empirical answer based on actual results and wondered if a proportional detector had much utility for spectrum analysis. Konny...
... They can be used with good results, especially for lower energy photons, where NaI/etc scintillators are not useful. No one radiation detector is "best"...
Thanks all, for the helpful information! So as a practical matter a proportional detector is primarily useful for low energy situations where NaI is useless. ...
Even though an aluminum housed 2" x 2" is only charted down to 60 keV, I find that they are still useful down to just above 20 keV before they fall apart, more...
Commercial silicon PIN detectors integrated with a jfet amplifier and cooled by a thermoelectric cooler are good down to 1keV or so with a resolution of better...
... I've actually used the Amptek stuff myself. Real cool stuff. Works great. Amazing. I'd love to have one in my private basement lab ;-) -- ... Chris...
Hi Russel, The 26eV number(I rounded it off) is an experimental average ionization energy for argon. It wasn't stated in my information source, but I am...
Both a proton and an electron have the same magnitude charge, with opposite polarity of course. The mass of a proton is much more massive than an electron,...
... Right. Each has the same magitude charge, opposite in sign. So the neutral atom is balanced. ... Different isotopes have a different number of neutrons. --...
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