Radium gamma spectrum

Not much doubt about what this is, but one peak is mis-identified as Cs-134. 

Odd, I thought I had posted in the gamma spectroscopy section. Oh well...
Yes, that peak is quite broad which is not helping, when the capture is complete perhaps it will be better defined (this is just 24hr). I'll open the data in InterSpec and see if that does a better job of isotope ID. The K40 is also probably something else - you can tell by the error being large. Such a large bandwidth of peaks I doubt I can get the 103 better calibrated across such a range, it won't do multi-peak fitting only a 3 peak registration. There is no smoothing of that data!

269 million counts lol! BecqMoni lost connection to the counter after 3 days, I think it was my fault because I tried to connect using my phone just to monitor what was happening remotely and that caused a hiccup. Also, if the iOS app is opened and connected unless you force close the app it hangs on to the BT connection and prevents anything else connecting to the RC103. Took me a while to figure out why I could not connect again using BecqMoni (dumb mistake on my part). Anyway, I don't think a higher count would have provided significantly more info. InterSpec found a lot of peaks and I got it to fit those peaks to known nucleids which gave me a correction offset. I always suspected it was reading energy levels a bit low - and it was. I got BecqMoni to write new calibration data to the RC103 but it still needs checking regularly. Best FWHH I see is around 9% which is maybe a little higher than advertised.

 

Next job is to take a detailed spectrum of Thorium and see if the energy calibration provides better accuracy than it did last time,