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Charles, The peak between your Fe esc and the Am label isn’t La I eyeballed and the centroid at 4.5 appears to be a Ti Ka. If the cal is off just a bit it could be the Fe esc although it appears to

George, here is the .mca that I used for this example and will use to try and replicate the process with DppMCA. Charles

Charles, I assume this was slider cal’d. Why is Fe escape in the Am button? Or are these 2 different buttons? What Am energy is it? This is quick and dirty but can still miss a lot of stuff. You

I have a copy here someplace but it would be old and haven’t used it in awhile. Its available at https://www.jimfitz.co.uk/fitzpeak.htm Dud Sent: Sunday, March 8, 2020 8:53 AM To:

"Regarding the possibility of confusing Nb peaks with others, the precise alignment of all available emission lines for Nb pretty much eliminates this."Thanks, it's really good to hear that, and I'll

That's a nice graphic display too Dud, simple, direct. "Why does the DppMCA software limit you to 411? Is it a gain setting problem?"Correct, the last allowed click position for course gain is

Geo, Very good on the cal procedure and like every other laboratory procedure spot checks and end of day are essential. The Ba 133 gives other useful lines to double check the Ecal with. A Fe-55 and

Thanks, George. Regarding the possibility of confusing Nb peaks with others, the precise alignment of all available emission lines for Nb pretty much eliminates this. Attached is the same scan with

Nice presentation Charles, thanks, and in only a few minutes- that's good. Wow, that Si-PIN really gives a ton of data points. One suggestion, make duplicate run, without exciter. Make sure Nb peaks

If I'm really into getting all I can from the analysis step, I use FitzPeaks. You can store the file from Theremino in the appropriate format and import it into FitzPeaks. I don't see this analysis

Based on Dud's encouragement I will try and use DppMCA for analysis. To be clear, I tried it previously when I first got the Amptek system and got discouraged. I'll give it another try and document

Thanks Dud, With Si-PIN the evolved calibration procedure for general scans here has evolved into what may become my standard.The "stage is set" for a range of 0-61 keV, 4096 channels.5.9 keV the Mn

Geo, Bringing in an old .mca file will use the old cal. It seems the Ecal in the View / preferences tab only works for a new acquisition. If you need to change an old cal you’ll need to reenter the

Charles, I for the life of me can’t understand your thinking. You have a $7,000 professional Si-Pin spectrometer system and software that is designed specifically to determine elemental unknown’s

My gear is tied up with some LONG runs, closing on 100 hours, but I'm working on my libraries between chores.Geo

Here is the .mca that I am now pointed to in View menu / Preferences. BTW, just pointing to a .mca file here is kind of buggy. I eventually had to enter it manually. The E cal is 4 peaks and it is

"Instead it uses the E cal of a specific .mca file that you have to point to in the View menu / Preferences."GOOD TO KNOW THAT!I've been struggling with that same issue...….THANKS Charles!George

All that being said I can see the value of having a precise E cal saved in my .mca files so that others can view them in DppMCA with the minimum of hassle. What had eluded me until now was how DppMCA

" These spectra are wrong as well. It appears you have a bad energy cal that you were using." Sorry, but my Theremino image of these spectra speaks for itself. The energy cal over the entire range

Charles, These spectra are wrong as well. It appears you have a bad energy cal that you were using. This is the Ag cal on 2/24/202 START_TIME - 02/24/2020 04:58:50 SERIAL_NUMBER -