Gamma Spectrometry Forum

Hi Karl and Steve, encouraged by your advice I ordered a new crystal on eBay. Lets hope it is OK and that the swedish customs let it pass without excessive taxes and import charges. Karl, it is very kind of you to offer to help me. It's a pity that you move from Stockholm. Your suggestion of couplin...

Thanks Steven for the instructions how to replace the crystal. However, the cost and time to do this, together with the uncertainty of the outcome, makes me doubtful if it is the correct way for me to take. I saw that there indeed was a crystal of same size for sale on eBay but with import costs and...

Hi Luuk, Yes, after searching more information on the internet I have also come to the sad conclusion that you are correct even if your explanation doesn´t explain why I get higher energy (=MORE light) at the front than when the source is closer to the PMT. Maybe it can be explained with a larger cr...

Hi luuk, Thanks for your reply which made me a bit concerned. I have tested with a Am241 source. Yes there is a rather abrupt change of peak energy at around 7 cm from the front. If the source is located 6 cm or closer to the front I get a peak energy of 63.4 keV (the discrepancy to 61 is calibratio...

ftp://h70n8-s-oev-d2.ias.bredband.telia.com/disk1/pub/GammaSpectra/DependenceOnSourceLocation.png Hello again! It was more than two years since I posted on the old forum http://www.gammaspectacular.com/index.php?route=forum/post&path=265 I have had some time to play with my GammaSpectacular GS-...