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We'll try to limit the size of our picture posts, and try to NOT repost pictures in your replies. Also without the WIKI, we may get along fine. your host, George Dowell Geo Group Email Addresses *

Hi guys Ludlum 12S??is??my favorite. Yes the readings are not accurate. Actually for low energy x rays ,they overestimate due to energy response curve calibrated to Cs137,advantageous for me.

Geo, 1 frustrating week of trying to get a 30L dewar to fill a BEGE detector. Only got 3 psi and it would drop to zero on trying to fill the detector. Had a bad dip stick seal in one withdrawal device

Hey Dud, how did the Ln2 project go? Got some results to post?Geo

No, the 12S is not a good instrument for that application. It only reads dose rate correctly when calibrated for Cs-137. All other energies are wrong. The proper instrument would be a Ludlum 17

For DETECTING the Ludlum12S is hard to beat, and is a good instrument for your application. I used a similar instrument to track down a defective industrial X-Ray machine at a factory in an industrial

Taray, Be careful with X-ray tubes as they have a very broad energy range with a very high dose rate. The Ludlum12s is not an appropriate instrument to measure the dose rate with as its response is

Tube tech is simple. The beam is combination of Bremsstrahlung X-Rays from the electron beam stopping on the target and XRF from the tungsten (or other target) caused by the electron stream. Same Ka

Geo Unlike Am241,I am not familiar with the X-ray xrf??spectrum yet Yes I will stack if I have to go beyond 3 secs to cool off. Regarding Br ,it is coming ?likely?from the coffee The

X-ray emission spectra from a tungsten target produced at 100 kV. Curve 1 is the theoretical spectrum without any filtration. Curve 2 is the typical spectrum with the inherent filtration of the x-ray

Thanks for that analysis Taray. We should keep quite about the free vitamins that are unknowingly being included in coffee, they will raise the price!(joke). A few real ideas - We can see clearly on

Hi guys No analysis is complete without a control Here is an xrf of the? same fresh coffee beans (partly crushed to make it more homogenous) Wrapped in a thin kitchen plastic sheet. In line with the

Good for you. I have a 4X5"polaroid film holder, will FUji version fit? also 4x5 cut film (negative) and regular X-Ray film holders too. To: [email protected] Sent: Thursday, February 11, 2021 6:55:34 AM

GeoYes I did and success.That was one of my preliminary test?I used a green xray scintillation screenAlso venturing into x ray photography with fujifilm polaroid?So far have??not ?got?the right

Good start...... Looks like your internal filtering is a bit lower than mine, This could be interesting. Can you see the beam with a screen? A gadolinium based screen shows best. Geo To: [email protected]

Hi guys Here is an repeat xrf of my office coffee . This time with x ray? source KV 60 MA 0.1 Exposure time about 5 secs ALARA protections taken The peaks are Fe,Ni,Zn and possibly rubidium The Fe/Ni

If everything transferred and was entered correctly, these is the last steps and you can add oxygen to your paper. Push OK on the EXPRESSION menu now. On your SPECTRA LIST box, HIDE live_data_1 and

This is the germanium step. *Add Ge to your paper= Bi-N-Ge* Then go to the DPPMCA program's menu bar, press ANALYSIS From the drop down menu, select EXPRESSION, then on the action box add this formula

*Bi-N Now add nitrogen (N) to you paper. * Then load the .mca file live_data_2 into your program. It was made by removing the sample from the jig and running with no sample target for 2 minutes. This

Enough work, ;let's play a game. The periodic table of elements game. *Bi-* First we do Bismuth. So mark Bi on a piece of paper, then load this file into your DPPMCA program, it should show up on your