Gamma Spectrometry Forum

Hi Steven,
Thanks. Indeed LaBr3 unfortunately is not free from internal noise mainly due to Actinium beta's. But it is mainly present in the higher ranges, around 2000-2400 keV. Subtracting background is useful sometimes. Regards, Alfred

Hi guys,
I like to share a few gamma spectra I registered using my new LBC detector. Regards, Alfred

Alfred, very Interesting the use of the sensor ev CZT. What about the low energy gammas ? Did you try with Americium ? Lodovico Yes, I tested Am241 too, but I am not sure which files I saved. I am now at work, will look into it this evening. Regards, Alfred Enclosed two graphs showing 241Am, using ...

Hi Pieter, I tried to imitate your setup for Raspberry Pi microscope but when I start getrawimage.py, I get ImportError : No module named scipy.misc. Do you know what went wrong? I did perform sudo apt-get install python3-scipy python3-picamera and the other two .py files seem to work. Screendump at...

lodovico wrote:Alfred,
very Interesting the use of the sensor ev CZT. What about the low energy gammas ? Did you try with Americium ?
Lodovico

Yes, I tested Am241 too, but I am not sure which files I saved. I am now at work, will look into it this evening. Regards, Alfred

Nice, glad to see you you were able to get some results. It is a while since I experimented with these, but one of the spectra I did was Ba133 and you can see it here. http://www.gammaspectacular.com/gamma_spectra/ba133-spectrum PRA is certainly capable of 1% resolution if your detector can do it, ...

Nice. I did a test with our AmpTek diode detector if PRA would be able to achieve the resolution. I posted the comparison with the Amptek Pocket MCA a while ago: http://www.gammaspectacular.com/phpBB3/viewtopic.php?f=14&t=75&p=367#p338 About 1 % in both cases. But I have not always been abl...

luuk wrote:Hallo Alfred,
Nice to see you here to.
Any news about your Chinese crystal? did you buy it yet?
Groet,
Luuk

Hi Luuk,

Still hesitating. I did not find a good PMT for it yet and price remains rather high.
Best regards, Alfred

@Steve, with respect to primordial elements, I also have 9 or 10 g of Samarium, which is an alpha emitter. However, I can't measure any alpha's neither gamma. Does anyone has an explanation? (When I use my 241 Am source I get thousands cps alpha's )