Search found 674 matches

by Steven Sesselmann
07 Oct 2019, 21:50
Forum: General discussion
Topic: Service Literature
Replies: 2
Views: 102

Re: Service Literature

Hi Grandpa, I really don't feel comfortable addressing you as grandpa, so could you please add a signature to your post with a real name. As for those manuals, they sound like a really valuable resource., maybe if you are interested we could start a collection in the Recources forum. The best would ...
by Steven Sesselmann
05 Oct 2019, 21:58
Forum: Introductions >> Start Here !
Topic: Greetings from the Southeastern US!
Replies: 4
Views: 137

Re: Greetings from the Southeastern US!

Hello Evan,

Welcome to the forum.

Sounds like you have some nice antique restoration work to do, so please take some pictures and share the experience, something for everyone to learn. Also feel free to ask if you need help, someone here has sure seen it or done it before.

Steven
by Steven Sesselmann
05 Oct 2019, 19:12
Forum: Spectrum
Topic: Maralingite
Replies: 9
Views: 194

Re: Maralingite

elemental wrote:
05 Oct 2019, 05:00
In the meantime if anyone finds a supplier please let me know.
Gary,

There is a good business opportunity for you ;)

Steven
by Steven Sesselmann
02 Oct 2019, 20:48
Forum: General discussion
Topic: activating gold
Replies: 2
Views: 126

Re: activating gold

Peter, It would be pretty cool if you could get that to work, but I very much doubt that 5 tiny Am sources will get you enough neutrons to measure let alone activate gold. Check out the video by Carl Willis where he uses a Nuclespot Polonium source, significantly higher activity than a smoke detecto...
by Steven Sesselmann
30 Sep 2019, 09:49
Forum: Detectors
Topic: Scionix 38B57 calibration and linearity
Replies: 7
Views: 173

Re: Scionix 38B57 calibration and linearity

That might explain the low gain, it's 10X what I normally use in my detectors. Such high impedance dividers are used to extend battery life on portable meters.

Steven
by Steven Sesselmann
30 Sep 2019, 09:36
Forum: Software
Topic: Pulse shape issue in PRA 24
Replies: 4
Views: 143

Re: Pulse shape issue in PRA 24

Steve, The software centres the peak on or around sample #30, so to narrow the sample window you should un-tick the same number of samples at either end, i.e. 1-10 and 40-50. The important thing here is to understand the relationship between sample rate and number of samples so that your window is a...
by Steven Sesselmann
30 Sep 2019, 09:35
Forum: Software
Topic: Pulse shape issue in PRA 24
Replies: 4
Views: 143

Re: Pulse shape issue in PRA 24

Steve, The software centres the peak on or around sample #30, so to narrow the sample window you should un-tick the same number of samples at either end, i.e. 1-10 and 40-50. The important thing here is to understand the relationship between sample rate and number of samples so that your window is a...
by Steven Sesselmann
30 Sep 2019, 09:30
Forum: Detectors
Topic: Scionix 38B57 calibration and linearity
Replies: 7
Views: 173

Re: Scionix 38B57 calibration and linearity

I agree, very nice linearity..

Not surprising that the gain is low when you are running the detector at 550V, not sure what else you can do. How many mega ohm is your divider?
by Steven Sesselmann
30 Sep 2019, 09:29
Forum: Detectors
Topic: Scionix 38B57 calibration and linearity
Replies: 7
Views: 173

Re: Scionix 38B57 calibration and linearity

I agree, very nice linearity..

Not surprising that the gain is low when you are running the detector at 550V.
by Steven Sesselmann
27 Sep 2019, 07:48
Forum: Detectors
Topic: Scionix 38B57 calibration and linearity
Replies: 7
Views: 173

Re: Scionix 38B57 calibration and linearity

Steve,

Thanks for posting, and well done on the linearity plots and setup, great spectrum.

I believe you have correctly identified the escape peak at around 2103, and the next little hump is the compton edge if I am not mistaken.

Steven