Search found 943 matches

by Sesselmann
12 Apr 2022, 07:41
Forum: Physics, electronics and beyond
Topic: What is the actual half-life of Cs-137?
Replies: 6
Views: 169

Re: What is the actual half-life of Cs-137?

I would like to know why isotopes decay ?

Reason tells me, if nothing is changing in our world then nothing should decay, so what causes nuclear decay ?

Let's agree to avoid vague terms like entropy 😂
by Sesselmann
11 Apr 2022, 07:56
Forum: Detectors
Topic: gamma spectrometer signal
Replies: 11
Views: 2158

Re: gamma spectrometer signal

Pawel,

Considering it is sampling at 48 kHz, the pulses look about right.

Count rate seems low for a scintillation detector, but maybe you are shielding out background... don't know?

Steven
Audacity Screen Shot
Audacity Screen Shot
by Sesselmann
07 Apr 2022, 13:56
Forum: Detectors
Topic: Plateau and Efficiency of a 44-2
Replies: 6
Views: 190

Re: Plateau and Efficiency of a 44-2

Greg, Without seeing the complete S curve it is difficult to verify your claim, 1025V does seem high for most PMT's. The objective of finding a plateau is to identify where the count rate flattens off before rising exponentially, so starting at very low voltages 500V you would get little of no count...
by Sesselmann
06 Apr 2022, 07:50
Forum: Introductions >> Start Here !
Topic: Greetings from California!
Replies: 2
Views: 144

Re: Greetings from California!

Alexander,

Welcome to the forum. I hope you find likeminded people, interesting conversation and information about radiation detection here.

On the main index you will find forums for different subjects, so feel free to share and discuss any science related project.

Cheers..

Steven
by Sesselmann
01 Apr 2022, 17:12
Forum: Product Manual Repository
Topic: Eberline ESP-2 Manual
Replies: 0
Views: 105

Eberline ESP-2 Manual

Manual attached
by Sesselmann
01 Apr 2022, 17:09
Forum: Product Manual Repository
Topic: Gamma Grapher User Manual
Replies: 0
Views: 77

Gamma Grapher User Manual

Found this on my computer, might be useful to someone...
by Sesselmann
01 Apr 2022, 08:08
Forum: Product Manual Repository
Topic: Gammaspectacular GS-USB-PRO Manual (2022)
Replies: 0
Views: 102

Gammaspectacular GS-USB-PRO Manual (2022)

Hi Guys, Hopefully this is the first of many manuals to be posted in this repository. My wish is that members of the forum upload manuals here for any old or new radiation detection instruments and that it will serve as a source of information for hobbyists and professionals. You will find the new f...
by Sesselmann
01 Apr 2022, 07:56
Forum: Detector drivers
Topic: Calibrating a Victoreen 290
Replies: 3
Views: 212

Re: Calibrating a Victoreen 290

Greg,

I'm not familiar with the 290, but I am ure someone here can help you. Might help if you post a picture of the unit and the circuit board.

I want to add a repository on this forum for old manuals ..

Steven
by Sesselmann
17 Mar 2022, 21:06
Forum: Spectrum
Topic: What is this nuclides in wild mushroom from europe?
Replies: 15
Views: 481

Re: What is this nuclides in wild mushroom from europe?

Thanks, Steve. I'll order 16 oz of Potassium Chloride. This weekend, I'll clean the probes well (I'm afraid to touch it before cleaning) and will redo calibration before taking uncalibrated background spectrum for several hours and retaking the spectrum of the wild mushroom. Chris, There is so much...
by Sesselmann
16 Mar 2022, 15:57
Forum: Spectrum
Topic: What is this nuclides in wild mushroom from europe?
Replies: 15
Views: 481

Re: What is this nuclides in wild mushroom from europe?

Chris, I m not 100% convinced about your spectrum. If the Scionix detector is in reasonable condition your spectrum should look different. Can you please post a clean uncalibrated background spectrum recorded over at least 1 hour with the scionix. Try setting your gain so the K40 (1460keV) peak land...