Search found 30 matches

by Steve Dubyk
18 May 2015, 08:15
Forum: Spectrum
Topic: A Spectrum to Ponder
Replies: 12
Views: 6488

A Spectrum to Ponder

I have a real interest in the primordial radionuclides, and have attached a spectrum from one of them. This radionuclide is in very low abundance, although the element is not rare. It has a very long half life. I used a 100g sample to obtain this spectrum, and run times were very long. Peaks below 5...
by Steve Dubyk
18 May 2015, 08:03
Forum: Spectrum
Topic: Gamma spectrum of Jefferson Golden Hour clock
Replies: 4
Views: 2507

Re: Gamma spectrum of Jefferson Golden Hour clock

Alfred, that is a very nice spectrum, and I agree, a really neat clock!

Steve Dubyk
by Steve Dubyk
18 May 2015, 05:04
Forum: Introductions >> Start Here !
Topic: Steve from New Mexico
Replies: 8
Views: 4113

Re: Steve from New Mexico

Karl, a couple of messages are sitting in my outbox, and are marked sent.

Steve
by Steve Dubyk
16 May 2015, 09:43
Forum: Introductions >> Start Here !
Topic: Steve from New Mexico
Replies: 8
Views: 4113

Re: Steve from New Mexico

Karl, I sent you a message via the PM system, but it is not clear if it has been sent. Let me know.

Steve Dubyk
by Steve Dubyk
12 May 2015, 12:12
Forum: General discussion
Topic: Rare Minerals from the Petaca District, New Mexico
Replies: 0
Views: 2011

Rare Minerals from the Petaca District, New Mexico

Here is a paper concerning the minerals that we have collected in the Petaca district here in the state; most of the minerals are radioactive so we spent a lot of time with scintillation units in hand. It's a beautiful area up in the mountains of northern New Mexico, even when mineral pickings were ...
by Steve Dubyk
12 May 2015, 12:07
Forum: Introductions >> Start Here !
Topic: Steve from New Mexico
Replies: 8
Views: 4113

Re: Steve from New Mexico

Karl, I have plenty of mineral specimens from the Petaca district, and am going to collect more soil at the Trinity fallout site soon. Let me know what you are interested in. I'll post the Petaca paper in the General Discussions section so you can see what we have collected from there.

Steve Dubyk
by Steve Dubyk
12 May 2015, 11:51
Forum: General discussion
Topic: Evolution of Uranium and Thorium Minerals
Replies: 1
Views: 1990

Evolution of Uranium and Thorium Minerals

Hello, I thought this was an appropriate paper for this forum, since I use scintillation equipment not only to find but also to do gamma spec analyses of what I have found. Additionally, my degree is in geology with a emphasis in geochemistry. While it's a pretty technical paper, it does have some p...
by Steve Dubyk
11 May 2015, 09:08
Forum: Resources
Topic: Very Useful Index of Hamamatsu PMTs
Replies: 0
Views: 3633

Very Useful Index of Hamamatsu PMTs

This particular catalog from Hamamatsu has a long list of the older PMTs that folks tend to see on the market these days. It includes basing diagrams that are very useful!

Steve Dubyk
by Steve Dubyk
11 May 2015, 07:30
Forum: Detectors
Topic: Info on some PMTs?
Replies: 10
Views: 7246

Re: Info on some PMTs?

Here is the spec sheet for the R374, which is quite different than the R375. I use a high gain version, the R1104, and that information is included also. I also have a few PMTs with the frosted window, and they work well for gamma spec purposes.

Steve Dubyk
by Steve Dubyk
11 May 2015, 07:21
Forum: Introductions >> Start Here !
Topic: Steve from New Mexico
Replies: 8
Views: 4113

Steve from New Mexico

Hello folks! I really like the look and utility of this new forum! I have had many years of experience with radiation detection equipment in both the public and private sectors, from determining uranium resources to clean up of mill tailings and impacted (literally) test sites. I have built most of ...