Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
Search
Re: Xrf old faucet
|
Today I'm waiting for the last test to finish, it is a follow-up 24Hr B/G background test to finish off a week long study of a single sample of uranium without lower daughters. The first step was to run a calibration test and record that, then a 3 day long run with the sample, then another calibration verification to prove before and after calibration, now a 24 Hr background test. During the day long runs, the timer is set to stop at intervals so I can recorded the data up to that point in time, then timer is reset until the next interval has elapsed. A 3 day run may take 4 or more? days to complete with this stop-start situation. This allows data to build up but with a track-record of the process.? Intermediate run times can be helpful later when comparing segments of the current run against older stored runs. When comparing two different samples, it is useful to have one of the major peaks be about the same height, display both scans on the same screen in LINEAR mode, allows direct comparisons to be made of peaks. Without expensive software, we must rely on direct comparison between similar samples, one of which is calibrated or verified,? to achieve quantification values. For example I had Cs-137-in-soil samples made up at a certified lab into different sealed containers that fit our various sample holders. Jars, test tubes, etc. The contents ae weighed and gives a good starting place to compare unknow samples to a know one. The process to make such a sample set is very labor-intensive and so is the paper work trail. Years of collecting have supplied similar exempt quantity standards for alpha-beta-gamma sources, as well as radium quantification standards and Uranium ore concentration standards and Unat and DU items (i.e. FiestaWare dIshes). Since our sensors operate with a 5 X 5 mm (25mm^2) sensitive area, we must also take that into account and temper our quantification attempts accordingly. Many check sources have an active area that is smaller than the sensor sensitive area, but quite a few check sources are much larger, especially the electroplated ones.? Geo From: "taray singh via groups.io" <sukhjez@...> To: [email protected] Sent: Thursday, November 12, 2020 10:35:16 AM Subject: Re: [XRF] Xrf old faucet
Another thing? The plastic mount is a tape?reel with a?hole in the center Perfect of samples to be placed on top The pic of the tap is without the reel It is just an object to help me take a pic shot In case anyone is wondering.. Taray On Friday, November 13, 2020, 12:25 AM, GEOelectronics@... wrote:
|
to navigate to use esc to dismiss