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Better scans with an aluminum layer added to the lid, eliminated most of the Pb K line interference- Note-added 1/4" aluminum layer between shield and its lead lid. Now the uranium K lines are

OK good, will do that this morning, I had pulled that one out, remembered something about it was difficult.Geo

There were a couple that were weak. In particular the bassetite would be good to put under the tube. Charles El El lun, ene. 27, 2020 a la(s) 7:59 a. m., <GEOelectronics@...> escribió:

Charles, are there any of the rocks you sent me that you would like me to examine under the X-Ray tube before I return this to its original purpose? I'm sure the only difference we will see between

I'll keep that in mind. It's in the shed right now. I've been running dehumidifier continuously since I got it closed in (mostly, still needs a bit of caulk) to keep it down to 35% RH. But it sure

When you get around to that Nick, you might want to let it run with filaments only for a long time in case it needs to dry out inside before applying HV.Geo

Very cool. My Lixi has been sitting in the box since I got it. Need to at least set it up and test run it to make sure it works before getting much more invested. Also need to wire up a Glassman HVPS

Geo, Back down the tube current you’re running 97% Dead Time and way overloading that detector with pile up . That’s going to create poor resolution, energy shift and lords knows what other

Picture labeled for clarity- this is not the cabinet unit that I'm working on, but the original outfit that's been here forever and that you saw in Nevada. Since that field trip several improvements

Geo Nice. What angles are you using for the Si-Pin to the Target and X-ray tube to the target? Do you slide the Sin-Pin in closer when taking the shot. The distance that is shown here is pretty far

First run- Torbernite. A 150 second run was made to establish any self XRF from the uranium in the rock. Then the exciter was turned on and the run stopped after 5 seconds. Already the metals had

Accessories- Fine tungsten collimator on BEAM Under Fine Tungsten Collimator is the Broad? Tungsten Collimator, which can be used alone: The Fine Tungsten Collimator can also be used on the sensor:

Portable, not handheld! LIXI C-Arm X-Ray Head and controller Graded shield/sample chamber Amptek Si-PIN Sensor Lid closed ready to make test run Always running near minimum

Sounds like a good plan, the Al goes in front the lead in back and sides. Let us know what works and what does not work.Geo

Ok so this is a good time to ask. I was going to redo the Am241 jig to recess the buttons in an extra layer of lead. Should I add a layer of Al as well? I am thinking the bulk of the interference is

Lately I have been using Am241 all the time. In fact it has been running 24/7 since I got it. I'll read about the low end noise adjustment but frankly I have not touched anything since it arrived.

Charles, I agree with Dud on the low end peak, are you making use of the TUNE SLOW/FAST icon button with the source removed after calibrating? It should reset your LLD automatically for you.. If you

Charles, Look at your low end energy below 1.5 keV. There is a lot of noise that is killing your count time. The peak at 0 .8 keV is just noise and can be eliminated by playing around with the peaking

Charles, Here’s the Near Pine comparison. It does have a lot more Y than Platt but the Fe content is the same. Th is up too. Dud CpsX1000 Vado Patsy Platt Cactus Branchville Near Pine Zr Kb 5.9 4.4