Gamma Spectrometry Forum

Hi

Still available!

Please email me directly at karl@brehwens.se

/Karl

Hi guys As some of you might know, I am interested in doing absolute activity measurements of soil samples, looking for Cs-137. I have a few samples here at home, some of which are measured by a reference lab. Still, I have not really chosen what will be my reference soil sample for background. To o...

BeqMoni or PRA. To me they complement each other well and are designed for slightly different purposes. While PRA is an good all-round MCA, BM is designed to do activity calculations. To me, Theremino is just too many thing that "distort" the spectra, all kinds of strange settings just to ...

Very interesting to hear about the "not under 100 keV" rule, I did not know this and I have not read this previosuly. I have almost always used my Eu-152 source for calibration, and the results have been good, but I will now skip the low point of 39.9 keV which I have been using, and try t...

A late reply... The sample is mixed in with the scintillation fluid, in a "standard" scintillation vial that is opaque. The PMTs are not in contact with the sample. I don't really know what kind of "resolution" one can get with these kinds of detectors. My experience is only of g...

As I understand it, the old post does not work any longer. Due to questions recieved on how to setup BM, I just post a screenshot of my settings here, to be vieiwed as a starting point. These settings need to be fine-tuned to your system, and will depend on (at least) on: *Noise of your PMT * Noise ...

Hi again! This time, a complete NaI detector kit is up for grabs. The PMT is a Hamamatsu R580-09 which I bought from iRad inc, and this tube is supposedly really good! "Unfortunately", I did not find a very good crystal to go with it, as I recall it only delivered 8% FWHM @ 662 keV, but as...

..and I still can't get the image to upload....

I'll try a PM instead...

Oh sorry.. I have some technical issues with the image upload...

/Karl

Hi

Sure, here is a picture including the circuit board.

I am looking to selling this detector+card, if anyone is interested.

/Karl