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Raddecay 4.0 Mike.

Geo, Where did you get this information? Thanks, Mike L.

Let's go one step further- Th-234 decay to Pa-234m to U-234 X-Ray yield at 13.618:Pa-234mX-Ray Emissions:Intensity Energy Assignment (%) (keV)0.2500 13.618 U La1 1/4%? No way all those U L

Good point Dudley- they are also not in evidence.Th-234Gamma Emissions:Intensity Energy Decay (%) (keV) Mode4.8000 63.29 b- 2.8100 92.38 b- 2.7700 92.80 b-

Geo, I wouldn’t call the 1.001MeV Pa234m gamma prominent by any respects as it has a yield of only 0.8% while the Th-234 gamma yield is 4.8%. The Th-234 will have a lower limit of detection for a

Now add picture and .mca of one of my best runs on the Blob- from 2014 and an Amptek SDD-1-2-3. Same data but looking only at the 0 to 25 keV section.

Let's hash this out in a separate sub-topic First up is an excerpt from the best HPGe scan of Trinitite I could find, done by Jon Rosenstiel for the Pittauerova/Kolb et al paper attached. If U-238

Mike, Ok that explains what I was confused about. I thought we were talking about the Fe loaded Trinitite. That also addressed the problem of source vs self XRF of the Fe samples. How do you do a

"I think I like Dud's "decay X-Ray" best."Yes that's fine, anything to indicate the excitation comes from the nucleus.Geo

Yes Dr. Gilmore also held that the external excitation be X-Rays, which is incorrect."To fluoresce by the application of X-Rays" is too narrow a description. Otherwise I learned a great deal from our

Yes,? I have always been impressed with the relative strength of "internally excited XRF X-rays".? My first realization of what they were was with the Bi/Pb x-rays in the Ra226 spectrum (NaI), in

“The beginning of wisdom is to call things by their proper name." --- Confucius

Dud,? There is nothing special about Trinitite #1.? It is just a piece I own.? Charles Young knew I was doing a multi-day Trinitite X-Ray Spectrum w/o excitation.? He said GEO was looking for one

One thing I liked better on the Yahoo Group platform was the idea of threads, in which you could change the subject title but keep that message associated with the intended thread. Evidently if you

Mike, What is Trinite #1? We have so many different Trinitite’s runs here it’s hard to figure out which one we are looking at. Please everyone describe how and what you’re running and please

"I understand that. I expected there might be some U x-rays because the early U238 daughter Pa234m beta decays to U234." Correct. That is where the decay U X-Ray would come from U-234 being created.

I understand that.? I expected there might be some U x-rays because the early U238 daughter Pa234m beta decays to U234.? I also thought there might be some self florescence of the U (like there is

A brief reply, more tomorrow:On the Am, as well as the U, it's the daughter's X-Rays we see. Am decays by alpha particle emission to Np-237, the X-Rays and gamma rays come from the Np atom and are

Absolutely, the guy is a wizard! I really like the Pu239 ID chart you attached.? Is that isotope identifier and library part of the free AMTEK DPP software download? So far I have only been using