Search found 87 matches

by sgt_bear
12 May 2020, 04:59
Forum: General discussion
Topic: alpha emitter
Replies: 6
Views: 1239

Re: alpha emitter

The specific activity of Sm-147 is 843.9Bq/g, since only 15% of Samarium are Sm-147 this would result in 150mg Sm-147 per 1g of Samarium, therefore Samarium would have technically 126bq/g. But since its an alpha emitter, most of the radiation will get blocked by the material itself. The radioactive ...
by sgt_bear
28 Apr 2020, 15:33
Forum: Detector drivers
Topic: DIY GM Environmental Radiation Monitor
Replies: 10
Views: 1490

Re: DIY GM Environmental Radiation Monitor

Hi Svilen,

Very nicely done. I'm a fan of arduino too and have done alot with it and even migrated them to my own platforms.

Where do you place this detector? If its near wifi, you could look into the new Arduino Nano IOT33 which has build in wifi and you can upload the data to thingspeak or so...
by sgt_bear
27 Apr 2020, 19:33
Forum: Shielding
Topic: Tin, and Pewter, and Copper, and Iron, Oh MY!
Replies: 16
Views: 1924

Re: Tin, and Pewter, and Copper, and Iron, Oh MY!

What do you consider expensive?
I've used a ~50mm copper tube for my shield, and added 4 sheets of tin (320x200x0.5mm). The sheets were 30£ in total. 2mm tin is enough for shielding pretty good.

I got the sheets from pewtersheet.co.uk
by sgt_bear
18 Mar 2020, 08:14
Forum: The lounge
Topic: Friends across the globe
Replies: 8
Views: 1368

Re: Friends across the globe

I also hope all of you are save and that this crysis is going as good as possible..... Its surely very serious, but i'm kinda not with people that think this will cause a colapse of humanity or even industrial countries. If we took a look back in time, we can see that the spanish flu has cost the li...
by sgt_bear
30 Dec 2019, 08:44
Forum: Detectors
Topic: HPGe detector back to life after long sleep
Replies: 12
Views: 2484

Re: HPGe detector back to life after long sleep

There are quite a few on ebay, most based in US, which makes them even more difficult to get, since shipping will be 300+$. Also there is a working one for 4000$ from italy, the seller even offers to demonstrate the device and deliver it personally :) but 4k$ is alot. Here is a quite extensive repor...
by sgt_bear
24 Dec 2019, 23:41
Forum: Detectors
Topic: HPGe detector back to life after long sleep
Replies: 12
Views: 2484

Re: HPGe detector back to life after long sleep

Very nice detector, and extremly fortunate for you that the detector still works without any work. I'm wishing for a HPGE for a long time, but i was advised by Carl Willis (maybe some of you know his blog) that HPGe's can in very bad condtion, even if they are sold at a high price. Most sellers know...
by sgt_bear
08 Dec 2019, 06:48
Forum: Detector drivers
Topic: Pushing an Arduino to the limit.
Replies: 7
Views: 2253

Re: Pushing an Arduino to the limit.

If you need a more "boosted" arduino, take a look at the new models, they come with ARM Processor which is much more powerfull (48Mhz instead of 16)
by sgt_bear
08 Dec 2019, 06:45
Forum: Spectrum
Topic: Unexpected Radioactivity at Munich Airport - Lutetium 177?
Replies: 4
Views: 1159

Re: Unexpected Radioactivity at Munich Airport - Lutetium 177?

Yes Taray's answer is very likely. Any university hospital of munich does such a therapy http://www.klinikum.uni-muenchen.de/Klinik-und-Poliklinik-fuer-Nuklearmedizin/de/therapiestation/Therapie-von-boesartigen-Prostataerkrankungen/PSMA/index.html As the page writes, this form of threathment is sort...
by sgt_bear
07 Dec 2019, 23:10
Forum: Detectors
Topic: Scintillation Crystal conversion
Replies: 4
Views: 1576

Scintillation Crystal conversion

After looking for the perfect radiation detector, i've come to an end and accepted that there is no ultimate device for the hobbyist. I'm looking for a high-tech device (logging, gps, external detector capability etc) but there are only a few, and these are priced for professionals, which means abov...
by sgt_bear
04 Oct 2019, 19:50
Forum: Spectrum
Topic: Maralingite
Replies: 9
Views: 933

Re: Maralingite

Hi Svilen, Nice spectrum ! Amazing, how were you able to aquire samples of maralingite? I've never seen any for sale or so, the only one that i ever seen are on the page of radioactivethings. I also tried to contact local tour oparators of maralinga site if they can pick up some, but they cant... If...