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Cool, that's a beast compared to mine. Max is 0.1 mA (100 microamp) here.It does have its own shielded housing, and I suspect the narrow measured beam cone angle is controlled by an mechanical iris

Geo, My Kevex’s are PXS4-613W and run with a CU015 60 kV power supply. Target Voltage: 5.0 to 60.0 kV Current: 0.01 to 1.00 mA X-ray source spot size: 0.01” x 0.020” (0.25mm x 0.45 mm)

No biggie Dud, My figures indicated that the focal spot of the electron beam, whatever size it actually is, is approximately 1" from the outer edge of the brass collimator on the outer housing, and

Geo, I have the specs here someplace but I don’t remember exactly. 16 seems about right and the microfocus spot was very small as I remember. I’ll dig around and see f I can find the manual

The scans that I posted show only Cr Fe and Ni. Of course, I can't see Li in any case.

Those cheap batteries used to have a nice zinc case, carbon rod and a lot of MnO2. The manganese dioxide is a catalyst to decompose hydrogen peroxide into water and O2, which reacts with calcium

That sounds logical Dud, hey on your Kevex stand alone tube, do you know the spot size and the cone angle? The one in my rig here in the counting room seems to have a 16 degree cone- does that sound

The anode is Li and the Cr has a high Li storage capacity. Did you see any V or Ti in that shot? They are sometimes used in the Cr coatings. dud Sent: Sunday, February 9, 2020 9:26 AM To:

That is interesting, Dud. So why is that the case and why only the anode? Charles

A Cr coated anode gives the battery a better discharge capacity and is more stable during cycling. Dud Sent: Sunday, February 9, 2020 6:37 AM To: [email protected]; Mike Loughlin Subject: [XRF]

Hi Dave, yes I think so. That's not what I'm doing but just by coincidence the 32 keV from Cs-137 decay is still very evident. We can assume the 662 is there too, I'm just not looking that high.Now

PS, Charles and all, keep a dead dry cell flashlight battery (the cheap kind). Take it apart for elements for your collection, a few of which also make perfect XRF calibration sources.Geo

Interesting question, and I don't know. There very may be electro-chemical reasons, for example 316 stainless has a lot better sodium corrosion resistance than 304 ss.Just a wild guess but the

Probably just more Cr in the alloy used. Possibly for corrosion resistance. Or the metal on that side is thicker, as it's the primary casing of the unit. charlesdavidyoung@...> wrote:

Just for fun I tested both sides of a Li battery. One side (+) is shiny and engraved and the other side is dull (-). After doing the shiny side (red) for a couple of hours I started the dull side

Cool. Geo

Geo, Jaw crusher, 110v motor, weights about 200lbs on a stand. It sits in the mancave and its easier to bring rocks to it than it to rocks. Dud Sent: Saturday, February 8, 2020 9:16 AM To:

A Pellet press is commonly used for FTIR, LIBS and XRF. It’s expensive to get set up though. I am just getting set up with a 12 ton press and the die’s for my LIBS system. The problem is you

Steve, A XRF cup is 2.5 cm in dia and 2 cm deep. Its filled about halfway and a cotton ball is placed in the back pressing the powder against the mylar film. It uses about 10 to 15 grams or so to

Are you still able to get a meaningful spectrum from the trinitite *with amateur probes*? It's over 70 years old. I had a piece which was given to dad in the mid 50's. His boss collected it shortly