Search found 47 matches

by Go-Figure
24 Jun 2019, 04:19
Forum: Spectrum
Topic: Exposure and Dose Assessment, an Homemade Attempt
Replies: 5
Views: 274

Exposure and Dose Assessment, an Homemade Attempt

Hi guys, This was a lot of fun. As You've probably noticed I always try an exposure assessment whenever I measure a spectrum from a sample. i wanted to try to compare the result from this method with the theoretical prediction of a known equation. Results are in the attached PDF. I attach the images...
by Go-Figure
22 Jun 2019, 08:25
Forum: Spectrum
Topic: Trinitite - Radioactive Glass from the First Nuclear Bomb Explosion
Replies: 6
Views: 370

Re: Trinitite - Radioactive Glass from the First Nuclear Bomb Explosion

My shielding is in the making, it will take some time. I want it to be modular and simple, I don't want a 60-80 Kg block of lead which I will never be able to move from where I put it. So I will start with a hollow cilinder with a internal diameter of 8.5 cm (I want to have some room to spare, also ...
by Go-Figure
17 Jun 2019, 22:43
Forum: Spectrum
Topic: Trinitite - Radioactive Glass from the First Nuclear Bomb Explosion
Replies: 6
Views: 370

Re: Trinitite - Radioactive Glass from the First Nuclear Bomb Explosion

Massimo, As always, a very nice report, and I think you will agree, it's time to construct some sort of shielding. Even a small amount of lead will significantly reduce your background. Steven Yes, I agree. Testing the background is one of the main reasons I went into spectrometry and radiation det...
by Go-Figure
17 Jun 2019, 08:26
Forum: Spectrum
Topic: Trinitite - Radioactive Glass from the First Nuclear Bomb Explosion
Replies: 6
Views: 370

Trinitite - Radioactive Glass from the First Nuclear Bomb Explosion

Hi guys, I've been wanting to test a sample of Trinitite for some time, but it wasn't easy to get one. Those who sell it (I mean the reliable ones) make clear they don't like the idea to ship outside the US, and Italy in particular is not a popular "destination" because several parcels have been los...
by Go-Figure
16 Jun 2019, 03:25
Forum: Spectrum
Topic: Fukushima Soil
Replies: 22
Views: 1303

Re: Fukushima Soil

Guys, there's just one problematic assumption you make. You take the date of 3/11/2011 as the date when those isotopes were created. But this is not true - the material existed in the reactor for quite some time (could even be a few years). It was just expelled from the reactor in March 2011 (actua...
by Go-Figure
12 Jun 2019, 07:56
Forum: Spectrum
Topic: Torbernite (Natural Uranium)
Replies: 4
Views: 289

Re: Torbernite (Natural Uranium)

Massimo, Thanks again for an excellent post, I commend you for your consistency and attention to detail. I notice you are operating close to 2000 cps, which must be close to the limit of what your sound card can count, but from your three comparisons above it looks as if you are not loosing too man...
by Go-Figure
11 Jun 2019, 08:10
Forum: Spectrum
Topic: Torbernite (Natural Uranium)
Replies: 4
Views: 289

Torbernite (Natural Uranium)

Hi folks, This weekend I received a sample of Torbernite from Congo (actually it was shipped to me from France, but I was told the sample was originally from Congo). As usual I first tested I with the Geiger counter (always wearing gloves, never touching the sample directly and cleaning everything a...
by Go-Figure
09 Jun 2019, 06:06
Forum: Spectrum
Topic: Fiestaware (Depleted Uranium)
Replies: 3
Views: 254

Re: Fiestaware (Depleted Uranium)

pilgrim wrote:
08 Jun 2019, 00:52
This is my spectrum recorded from a little piece of Fiestaware, about 12-14g.
Fiestaware 14g, 2q, GS1100-PRO+P14, 930V 19,5h.JPG
Did it give you anything above 600 keV? I wasn't entirely sure putting the Protactinium labels so I'd like to know if you got something there as well.
by Go-Figure
07 Jun 2019, 07:19
Forum: Spectrum
Topic: Fiestaware (Depleted Uranium)
Replies: 3
Views: 254

Fiestaware (Depleted Uranium)

Hi there, This is the cleanest spectrum of depleted uranium I got so far. My previous depleted Uranium spectra came from Uranium Glass, this time it's Fiestaware (ceramic dinnerware with uranium oxide in its glaze). Since the spectrum shows depleted uranium the plate dates between 1959 and 1972. Thi...
by Go-Figure
07 Jun 2019, 06:55
Forum: Spectrum
Topic: Tuff (Volcanic Rock)
Replies: 4
Views: 293

Re: Tuff (Volcanic Rock)

pilgrim wrote:
06 Jun 2019, 13:40
Honestly I don't remember, I only remember I recorded the spectrum outside the Lead shield because of the dimensions of the block.
So no lead shield fluorescence.