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charles: thank you for the quick reply. I stumbled across a portable dental xray unit ad on feebay for $690 *TECHNICAL SPECIFICATIONS* *：* 1.???Tube voltage：60KV 2.???Tube

I use 50kV, 1.6uA, and perhaps 30 seconds of exposure. However, it very much depends on your setup and what elements you are looking for. Charles [email protected]> wrote:

hi: I was curious as to what are typical xray requirements: Roughly what kV x.xx mA y.yy seconds of xray exposure is needed for a typical xrf measurement ? p

Taray, The binding energy of Rh is 23 keV so anything below that will eliminate the K’s. The x-ray brem will start at that voltage and peak about a third or so down. Dud Sent: Saturday, August

There is small labeling?mistake in my tektites and tellurium thermimo xray exciter pic which??I overlooked. Red??is??my big tektite Green Mike’s tektite with Rh characteristic hump? Blue

Mike Good input on the scatter study Well it appears that scattering can accentuate??minor peaks in bg??from outside and within the detector? Will wait for reply from Amptek Like to know the

Taray, As mentioned in my original post,?? I experimented with various samples using an Am241 exciter to study Compton and Raleigh (coherent) backscatter.? The samples were aluminum, copper, and

Taray, Yes, I was aware characteristic x-rays are not required.? You often see florescence in Gamma Spectroscopy.? My very first xrf experiment was with a NaI probe, Silver Coin, and a Radium watch

Check out this free ?articleTellurium Contamination in SiliconLooks like small amounts could be present in si- pin detectors

Since present in both xray and buttons points to si-pin detector as possible source? Seen??more when scattering from low??Z sample interactions??with detector. Te is sometimes added to

I managed to find my old Te metal and Al mca files to make a comparison. Te like peaks are seen in Al with xray and Am241 exciter More obvious when florescent? yield is low and higher scatter If look

No detailed chemical analysis? I requested for it? It is proprietary information

Good job Dud Sent: Thursday, August 15, 2024 12:20 AM To: [email protected] Subject: Re: [XRF-Page-2] medical ampoule The drug company replied After a constant barrage of questions ranging from

The drug company replied After a constant barrage of questions ranging from physics ,chemistry and nuclear science they finally did some analysis All impurities are within recommendation limits I

Mike In case you are??wondering,there is no absolute necessity to have characteristics x-rays for flourescent yield The cumulative effect of the??strong Bremsstrahlung??continuum together

Dud, Thanks for the detailed explanation. Mike L.

Mike, The Rh K lines are at 20keV and sit on the Bremsstrahlung (Compton) continuum which is generated from the electron beam breaking energy which produces X-ray’s off the anode. It is dependent

Taray, I’m going to hit the rock shop and pick up a tektite and see what I get. Te just doesn’t show up that often so I’m curious and a Rb Sr sum peak doesn’t quite fit either. Dud Sent:

Dud, This may be a stupid question.? If Rh is the anode (target?)?? why are there so many counts above the Rh Ka1 line? Mike L.

Very nice work!? There does seem to be some variation in all of these with regard to the Fe/Ni ratios, which I find interesting.?? Any idea why Rb,Sr, and Zr lines appear?? I am traveling now, but