开云体育

Red Trinitite. Some have said the red color in some Trinitite is there because it was stored in metal drums which rusted, then transferred the rust to the Trinitite. Others claim it is copper, from

Analyzing Trinitite with different methods.

"I use a Rock crusher for big rock samples" Pics? Manual? Portable (trailer hitch mount)?Geo

"How would you prepare a sample like that? Taking a piece off with a Dremel or even a cheese grater might introduce contamination. Do you know how labs do it, and can we do this in the home lab? I

Dud, of course you are correct. And that technology is not out of reach of the serious amateur. However, here, just like amateur radio, we are all amateurs, and will evolve to different levels of

How many grams of material for an adequate sample? ________________________________ Sent: Friday, February 7, 2020 10:36 PM To: [email protected] <[email protected]> Subject: Re: [XRF] The case of the

I use a Rock crusher for big rock samples. Most are just done in using a cloth covered hammer and then a ceramic mortar and pestle then sieving the powder down to a uniform and appropriate size.

Powdering a specimen is a common and practical way of getting a uniform xrf, but like you mentioned Dud, us collectors do cringe at that especially if it is unusual, expensive, and/or hard to replace.

Good points here Geo. However we’re all doing this all wrong and comparing apples to oranges. The excitation sources have widely different energies and source strength and exposure is from within

Great, yeah I hang there too when we drive through. Last trip was the day they installed the new mass spectrometer, I was really eyeing the old one for possibilities, but sanity prevailed.Now I can

A Si Pin and a SDD aren’t that much different. Did you run it on a Si-Pin or the Cd-Te detector? Dud Sent: Friday, February 7, 2020 2:07 PM To: [email protected] Subject: Re: [XRF] Mystery wire

bare wire, plastic clip holder. Geo

Charles, I would suggest starting with some lower to intermediate rad minerals with simple formulas, like columbite, monazite, and even zircon. Run both internal and external tests on each. Zircon

Yes it is in Northrup Hall, no I just hang out there, know some folks and make a nuisance of myself. I saw Jim last October at the mineral show, he has a booth there, we yacked it up for a while. I am

Ken, Yes, the insulation was left on the wire. The low energy response is mostly noise although one could possibly conjure up a Cl peak if one was reckless enough in the interp. The high percentage

Dud pointed out that I had a wrong filename so I have attached the files again with the corrections. I like George's explanation for why Fe and Y are not showing up with internal radiation. These

Cool on the U of NM, is it in the same building as the cyclotron and meteor museum?Do you work there or is it a club? Do you see Jim Hill anymore? Haven't heard from him since our last trip to

No it's all university level microprobe stuff from the local Institute of Meteoritics at UNM, nothing I can afford or have room for or even know how to use. The concept of using both the internal and

That's a great representation of the inclusions Steve. Is the X-Ray mapping done with electrons on an SEM or some other? Looks really cool. Also the photomicrographs. Do you have your own inverted