Search found 10 matches

by Stanford
02 May 2017, 02:54
Forum: Shielding
Topic: 3d printed shield?
Replies: 6
Views: 4252

Re: 3d printed shield?

Steven thank you

Will small quantities of lead-free solder (Sn-Ag-Cu) be a problem in assembling the inner shield?
by Stanford
06 Mar 2017, 06:37
Forum: Shielding
Topic: 3d printed shield?
Replies: 6
Views: 4252

Re: 3d printed shield?

Thank you Steven, When you say You can do a simple experiment using a piece of lead in front of your detector on a 45˚ angle with a shielded source emitting gamma above 80 Kev out to the side, the source will induce 80 keV x-rays in the lead so you can try inserting copper plates between the detecto...
by Stanford
04 Mar 2017, 04:32
Forum: Shielding
Topic: Detection Limit
Replies: 1
Views: 2325

Detection Limit

Interesting page on the limits of detection from Woodshole. In the attached image, it looks like their whole shield is lined with copper. Am I wrong in having assumed that the copper shield is only needed around the detector? Or is this a different case because, as described in the woodshole article...
by Stanford
19 Oct 2016, 13:18
Forum: Shielding
Topic: 3d printed shield?
Replies: 6
Views: 4252

Re: 3d printed shield?

Thank you, Steven. Seems like I'm going about this backwards. If my goal is to be able to detect trace elements in food and water then I imagine I need to work out a way to dehydrate and concentrate samples, a method of determining optimal sample container surrounding the detector (which I imagine i...
by Stanford
18 Oct 2016, 13:57
Forum: Shielding
Topic: 3d printed shield?
Replies: 6
Views: 4252

3d printed shield?

Hi all...

Any thoughts on using a 3d printed shield to house copper coated lead shot? is it reasonable for the lower section to have a smaller shield thickness? and, what's a reasonable sample chamber thickness? is 25mm sufficient?

Thank you,
Stanford
rad shield 003.jpg
rad shield 003.jpg (83.7 KiB) Viewed 4252 times
by Stanford
24 Sep 2016, 06:06
Forum: Shielding
Topic: Nickel-coated lead
Replies: 10
Views: 6121

Re: Nickel-coated lead

Super thank you Martin!!!!
by Stanford
23 Sep 2016, 14:16
Forum: Shielding
Topic: Nickel-coated lead
Replies: 10
Views: 6121

Re: Nickel-coated lead

Super thank you... I just read that "commercially available lead often contains a significant fraction of antimony, as that helps its material properties (the antimony makes it harder, easier to cast in molds, etc.). But antimony is one of the last materials you'd want in a radiation shield, as it i...
by Stanford
23 Sep 2016, 02:57
Forum: Shielding
Topic: Nickel-coated lead
Replies: 10
Views: 6121

Re: Nickel-coated lead

How about copper coated lead shot for the same reason?

Steven Sesselmann wrote:Nickel should be okay, most of the x-Ray's are under 10 Kev.

http://nucleardata.nuclear.lu.se/toi/xr ... list&el=Ni

Steven
by Stanford
23 Sep 2016, 01:33
Forum: Introductions
Topic: Hey y'all
Replies: 3
Views: 1501

Re: Hey y'all

Steven thank you This is exciting and much learning already. Is Cs-137 the only candidate? I thought that it doesn't bioaccumulate... not true? And no Strontium, Tritium, or Iodine? So, dehydration isn't necessary.... water molecules don't block anything? Dehydration for concentration makes it easie...
by Stanford
22 Sep 2016, 03:24
Forum: Introductions
Topic: Hey y'all
Replies: 3
Views: 1501

Hey y'all

Hi yawl I'm a newbie just checking in to say hi. I have a GammaSpectacular detector set up and running but limited shielding so far. I see there's a lot of info about shielding online already (thank you all for that). How about dehydration? Do samples of food stuffs need to be dehydrated and if so t...