Thanks Randall! This is great fun and it's nice to be able to watch the peaks build real-time. It seems the best thing is to do is take a reading at 60 seconds, 300 seconds and 600 seconds for the record, saving each for futu re reference.
Today all of my moly samples (stamps I call them they are the size of a letter stamp) -were tested, holy cow the sheet metal ones are really loaded with minor amendments and contamination not visible on NaI(Tl) (great for moly peaks for cal tho, even on Si-PIN). Also testing the Ni-Mo alloys, pretty interesting.
George
toggle quoted message
Show quoted text
----- Original Message -----
From: Randall Buck <rbuck@...>
To:
[email protected]Cc:
[email protected]Sent: Mon, 03 Feb 2020 13:37:22 -0500 (EST)
Subject: Re: [XRF] Ken's "Mystery Wire"
Very nice bit of detective work,
Congratulations, Geo.
Randall
----- Original Message -----
From: GEOelectronics@...
To:
[email protected]Sent: Sun, 02 Feb 2020 08:15:07 -0800 (PST)
Subject: Re: [XRF] Ken's "Mystery Wire"
Right now the chamber has a 1" thick aluminum lid, topped with several thin lead "blankets", a flexible shielding material. No leakage out of the top but more importantly no Pb XRF from the old lid shows up in the scan. From this I can design a new lid.
Tweaking the kV and uA, for the mystery wire, concentrating on a starting point,
we can now ID low Ni/ Chrome Moly Steel in 20 seconds. Next week
I will start the hunt for some know SS alloy samples at the local steel yard.
Bottom line, comparing to a known source is always best and easiest, not that they are likely to have any of this particular material on hand.
Ken do you have a 1 gram piece for Dudley?
Folks, would we call this Chrome-Moly Steel, with alloy to be determined later?
Geo
