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I'm looking for something that will generate scatter plots comparing different properties of isotopes. Ideally I'd like some web page that lets me select axis and click go but a CSV file with lost of properties would work.

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This seems like the kind of question to ask on the webapps SE. But I guess it could go here too... (admittedly there probably aren't that many people on webapps.SE who are familiar with nuclear physics) – David Z Dec 8 '10 at 5:46
@David: First, I also thought that this is off-topic but now (after exchanging few comments with Frédéric and looking at some other software questions) I tend to think that it is fine (especially considering the software tag). Also, there is the reason you stated: this probably wouldn't get answered anywhere else. – Marek Dec 8 '10 at 11:06
I chose to post it here because primarily the question is about the data set and secondarily about the tooling. – BCS Dec 8 '10 at 15:32

Chart of Nuclides?

Or like this

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Exploring the Table of Isotopes is my go-to site.

There are a few others out there, but when I moved from my last computer those were some of the bookmarks I didn't bring, 'cause I never used them...

You haven't specified what you want in your CVS file. I think this site only offers transition energies and branching fractions by radiation type.

For searching a whole database of transistions for lines of [energy range]$\times$[A or Z range]$\times$[halflife range] use The Lund/LBNL Nuclear Data Search. Very useful if you are thinking of building a novel calibration source or some thing like that. This site also has stopping powers and other good stuff (go up a level from the link...). Another go-to resource.

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What I was hoping to do was plot N vs λ. The spesific problem I'm interested in is what's with the bite mark in this chart at N~=130?: – BCS Dec 8 '10 at 2:33

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