Search found 146 matches

by iRad
18 Sep 2020, 21:57
Forum: Introductions >> Start Here !
Topic: Hi from northern Germany
Replies: 10
Views: 115

Re: Hi from northern Germany

We're very glad your here Dana!
by iRad
18 Sep 2020, 07:05
Forum: Introductions >> Start Here !
Topic: Hi from northern Germany
Replies: 10
Views: 115

Re: Hi from northern Germany

Aw SNAP... "In 1964, a U.S. Navy Transit navigation satellite failed to reach orbit and disintegrated in the atmosphere. The satellite received its electrical power from a 4.5 pound, grapefruit-sized radiothermal generator (RTG) that produced energy from the heat of its decaying radioisotopes. The d...
by iRad
31 Aug 2020, 10:49
Forum: Detectors
Topic: Bad 3x3? or is it just me?
Replies: 16
Views: 1500

Re: Bad 3x3? or is it just me?

I just got a shinny brand new looking 2M2 in the mail on Friday... dead as a doornail. Seller claimed it was new, pulled from an unused porotype instrument. Unfortunately these things are very fragile and stuff happens, even without signs of abuse. Although not the only way, thermal shock can kill t...
by iRad
20 Aug 2020, 05:07
Forum: Detectors
Topic: Building a LaBr3:Ce Gamma Spectrometer
Replies: 10
Views: 496

Re: Building a LaBr3:Ce Gamma Spectrometer

Hi Lukas - Nice report on a very nice detector build. Surprising to see them send out such an expensive crystal in can that looks so bad, however it is only cosmetic as you mention. That Hamamatsu R9420 is really a very nice photomultiplier tube, proving itself in that you get 3.2% FWHM with just th...
by iRad
18 Aug 2020, 08:35
Forum: Shielding
Topic: Casting a Lead shield for Scionix 38B37 /w Red Bull can
Replies: 13
Views: 1023

Re: Casting a Lead shield for Scionix 38B37 /w Red Bull can

As far as I know, the bins just stack the pulses in them, there is no record of the when specific counts in the bin occurred. And of course, the histogram does not log energy information. Unfortunately, capturing a spectrum would probably only be by chance, and would have to be a short spectrum with...
by iRad
18 Aug 2020, 03:16
Forum: Shielding
Topic: Casting a Lead shield for Scionix 38B37 /w Red Bull can
Replies: 13
Views: 1023

Re: Casting a Lead shield for Scionix 38B37 /w Red Bull can

Transient spikes can come from many sources including cosmic ray burst. If you are in an industrial area, gamma and x-ray is used in many applications, including materials inspection. Same thing if in a area of construction or roadwork, where it is used for inspecting welds in pipes and the density ...
by iRad
17 Aug 2020, 03:19
Forum: Spectrum
Topic: Unknown uranium mineral found in Penticton B.C. while on holidays
Replies: 9
Views: 489

Re: Unknown uranium mineral found in Penticton B.C. while on holidays

Conor
It's nice to hear that you used the probes I sent you to make the discovery. I enjoy reading your many posts and contributions, and I'm sure they are much help and interest to the group as well. Finds like this are becoming increasingly rare...
by iRad
16 Aug 2020, 22:50
Forum: Spectrum
Topic: Unknown uranium mineral found in Penticton B.C. while on holidays
Replies: 9
Views: 489

Re: Unknown uranium mineral found in Penticton B.C. while on holidays

Amazing find, and so close to a development. Thanks for sharing...
by iRad
18 Jul 2020, 00:45
Forum: Detectors
Topic: Big Scintillator, maybe with SiPMs?
Replies: 5
Views: 598

Re: Big Scintillator, maybe with SiPMs?

The crystal's color actually looks pretty good from the picture, but still hard to tell and it could be cracked internally. Luuk is correct about poor resolution and mostly only good for counting, even if it's in good condition. It would be cool to make a PMT housing and extend it with a long handle...
by iRad
18 Jul 2020, 00:37
Forum: Detectors
Topic: Big Scintillator, maybe with SiPMs?
Replies: 5
Views: 598

Re: Big Scintillator, maybe with SiPMs?

Just as I thought... :)