Gamma Spectrometry Forum

Hallo
i am not an expert, but in Geigerbot the microphone permission must be explecite allowed.
On my Iphone 5s it is settings - geigerbot -Microfone (green).
I have testet it just and it works.
IOS 12.3.1

With best regards
gerhard

Thank You, Mr. Sesselmann, for help. I use PRA 15 and Tolerance Threshold is 5, Correction is 0 and Boost gain 1. No shielding at all. I dont have one. Yes, the right, but also the left shoulder. This peak seems on the base not symmetrical and especially on the left shoulder. It deviates to the left...

Good evening dear members, I have a problem showing one of my crystals. It is a 2,5 x2,5 inch NaI crystal. It shows some distortion on the base in PRA 15 but not in Theremino MCA. C137_2,5_021116.png C137_2,5.png than with a selfbuilt 18x40mm NAI Detector C137_CA_011116.jpg C137_CA.png than with the...

Hallo, Peter This is a nice idea. But,if You believe it or not, with only one, i got also no indikation. Same i observed trying Lutetium crystals. With only one, no indikation, with 5 together,i got a spectrum. Maybe the Gaps have zero C137, than You are right and 4 together are also zero.But, if th...

Hallo Peter I have also from GB such spark plugs. But i have put 4 together and this is working. With only one, i have also Problems. As MathiaB wrote, only 1/4 of original. But 4 or 5 together could make the thing. Radioactivity is very weak with only one. There is another problem with this plugs. ...

hello luuk
Thank You for this information. A larger PMT, this seems obvious to me.Whenever building a detecor, ich will consider this.

Dear Neal, Thank You very much for helping me. I also come to conclusion, that a very good interaction of all parts is necessesary to get a good resolution, especiallly with NaI:Ti crystals. Theremino describes on its Software manual this problems and what to do,to get FWHM better. The problem ist,t...

Thank You, very much, Mr.Sesselmann for Your explanation.Now i see clear. Sorry for my user name,but when trying registration,my name was not accepted and i have a password and username generator and he did this job.So i try to change it again,perhaps it works. Another thing ist, that i found,that c...

Dear forum, I am new in Gammaspectroscopy an have a lot of questions. i am in trouble to understand Merek Dolleisers manual to PRA 15. He wrote on the first pages, that there is a limitation for around 1000 pulses per second to the limitation of 48000 samples. But, newer ADC or soundcards can sample...