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Hi guys To look at the smaller ?lower energies reduce the kV below the 15keV Zr peak.? In general keep the kV 2-3 times the energy of the peak you are looking for. U.. Couldn’t agree more If

Meantime I found Strontium in Trinitite with the Si-PIN and XRF- next to see if it's Sr-Y-90 type. Sr is in blue

The scan is of ishikawaite from Little Patsy Pegmatite, South Platte, CO. The Si-PIN is sitting on the window sill with a view of the Catalina Foothills. Charles

Geo, Try combining the amptek La,b and La,b libraries into one. It a pain to have to switch libraries between the two. I used to run over the weekend using a HPGe detector for those really weak

Good points and I'll definitely experiment with that when the equipment can go back into "experiment" mode. Right now everything is tied up taking measurements for my database with the current sensors

Geo, To look at the smaller lower energies reduce the kV below the 15keV Zr peak. In general keep the kV 2-3 times the energy of the peak you are looking for. Use a filter that has a k-edge about

Here's the longer run time Dude, there is information in the smaller peaks, but the overwhelming peaks are swamping some of them. Should I try less Kv or less uA? In the past I never noticed stable

Geo, Looks like you’ll need quite a bit more count time before you’ll finally see what’s there. The U/Th is most certainly fluorescing the Zr. What does the higher energy Ka’s look like. You

Steve's 97ct Zircon excited by 40kVp X-Ray @ 15 uA (microAmps) for 4.51 seconds. The tittle of the picture says it all.(will now look deeper for other elements) Geo>K0FF

,mca of 3.5 hour gamma spectrum scan of Steve D's 97ct Zircon in graded shield chamber on Si-PIN detector. Tremendous accuracy and detail, but not much going on in that range. Next up will be the

The Q in the picture's title stands for Question Mark. Steve's 97ct Zircon in the Si-PIN chamber. We know uranium is in it, down at the low end we expect the U daughters Pa and so on to show off

Will be glad to post those Dud, it may be a while, but definitely on the punch list for these samples.Geo

Geo, Very nice. It would be interesting to see a Si-Pin comparison in natural source with the same count time as the TeCd to look at the differences in efficiency. Dud Sent: Wednesday,

this is all natural, no9 excitation source used at all....that will come later.George

Geo, What was your excitation source. We need to sort out XRF lines from the source excitation lines or natural lines Dud Sent: Wednesday, February 26, 2020 7:41 AM To: [email protected] Subject:

After scanning the red Trinitite for 16,500 seconds (~4.6Hr) the Cs-137 fission product has caught up in the RT sample to equal the count of the TM sample (which was scanned for 86,400Secs = 24Hrs).

After more time has passed, noted in the parameter bar on the right, in seconds, the next peaks coincide. These are in the U and Np L shell peak trio at the left end, corresponding to Am-241 decay

Now the TM scan is ghosted as a red outline, while the RT sample in solid? yellow has been started , then stopped at the first point where a major peak height corresponds to one in TM. First to do so