Search found 809 matches

by Sesselmann
23 Feb 2021, 09:38
Forum: Spectrum
Topic: Uraninite from Piemonte - Sample 1
Replies: 1
Views: 46

Re: Uraninite from Piemonte - Sample 1

Massimo,

Nice mineral specimen and nicely documented experiment (as always).

Steven
by Sesselmann
09 Feb 2021, 11:32
Forum: Admin Announcements
Topic: Forum connection issues
Replies: 1
Views: 86

Forum connection issues

Hi Guys,

I have noticed a few times lately that the forum displays a connection error, something like please try again later. Has anyone else noticed this?

After clicking refresh a couple of times it usually works, but I will be looking into the reason, so in the mean time just be patient.

Steven
by Sesselmann
07 Feb 2021, 09:35
Forum: Spectrum
Topic: Lanthanum 100g 99.9% (with significant Ac227) contamination
Replies: 5
Views: 153

Re: Lanthanum 100g 99.9% (with significant Ac227) contamination

Ben,

Nice result, nice how Interspec gives so much more information about what we are seeing, it gives that extra confidence and explains why some peaks appear wider etc.

Steven
by Sesselmann
06 Feb 2021, 09:38
Forum: Detectors
Topic: SrI2(Eu) detectors
Replies: 19
Views: 1704

Re: SrI2(Eu) detectors

Attached below is a more comprehensive list of crystal efficiencies.

Surprisingly this is a very common question with beginners, they want to know why size matters ;)

Steven
by Sesselmann
05 Feb 2021, 10:42
Forum: Detectors
Topic: SrI2(Eu) detectors
Replies: 19
Views: 1704

Re: SrI2(Eu) detectors

I am not sure if you can achieve the best possible resolution with LaBr and a Soundcard, as it really wants a short time constant of ~300 to 500 ns. Although the LaBr3 has a fast pulse, this doesn't mean you need fast sampling, we are only interested in measuring photon energy, which in all cases n...
by Sesselmann
31 Jan 2021, 11:46
Forum: Software
Topic: Unexpected good news....
Replies: 5
Views: 857

Re: Unexpected good news....

Brian, When the first iPhones came out with lightning connector they used to come with a short adaptor to TRRS, maybe that's now an optional extra. https://www.ebay.com.au/itm/192423200864?chn=ps&norover=1&mkevt=1&mkrid=705-139619-5960-0&mkcid=2&itemid=192423200864&targetid=1137570801586&device=c&mk...
by Sesselmann
31 Jan 2021, 11:44
Forum: Introductions >> Start Here !
Topic: Hello From Iain in the UK.
Replies: 1
Views: 198

Re: Hello From Iain in the UK.

Hello Iain,

Welcome to the forum, your 40 years of experience means you have a lot to share.

Looking forward to have you involved in discussions.

Steven
by Sesselmann
27 Jan 2021, 21:08
Forum: Detectors
Topic: Another LaBr3 detector
Replies: 8
Views: 874

Re: Another LaBr3 detector

Rob, Nice set of data you have collected there.. Your findings are consistent with mine, best linearity was achieved with your detector at quite low voltages around 550V which means gain is quite low. That said I don't think we have to be too determined to use the whole 100 arb.u range, because in P...
by Sesselmann
25 Jan 2021, 13:36
Forum: General discussion
Topic: Video Introduction
Replies: 3
Views: 353

Re: Video Introduction

Rob, I'm glad you found the video useful. Temperature drift is something I think we have to live with. Turn on the equipment and let it warm up before you make your measurements and then do a quick calibration check before your experiments. Considering the number of phases we are putting the gamma r...
by Sesselmann
21 Jan 2021, 07:57
Forum: General discussion
Topic: Video Introduction
Replies: 3
Views: 353

Video Introduction

Hi Guys, Over the Christmas break I made a few basic intro videos for newcomers to spectrometry and PRA. For most of you this information is pretty trivial but hopefully useful for some. When making videos there are always parts I wish I would have done or said differently, but in the end it comes d...