Loss of a good resource.

[Sesselmann]

Not sure how many of you were regularly using the database of nuclear isotopes hosed by Lund University in Sweden, but sadly it went down a few weeks ago, so I emailed the IT administrator who informed me that the professor who was maintaining the database had retired and consequently the database was shut down.

The IT manager thanked me for bringing it to his attention and added a redirect to a new resource, which I think we already have a link to.

https://www.particle-nuclear.lu.se/nuclear-data-sunset

I did prefer the old database as it was easy to use, especially the feature that allowed sorting of gamma rays by intensity.

Steven

[jneilson]

A shame, although I think they were really only mirroring data from elsewhere and was one I hadn't visited much recently, but their bright yellow pages were somewhere I used to end up when looking for data for some of the more random nuclides.

Alternative sources of data include:

• DDEP (Decay Data Evaluation Project) hosted by LNHB (France): http://www.lnhb.fr/home/nuclear-data/nu ... ata-table/ - as these tables are specifically for experimental decay data, they're considered one of the best and most accurate sources, although can be limited to relatively common nuclides; they often don't have some of the weirder activation products I encounter.
• Nudat3 https://www.nndc.bnl.gov/nudat3/ - initial interface can seem a bit cluttered with graphs you're not interested in, but search your nuclide, and click through to decay radiation, and you get the nuclear data sheet with all types of radiation. Sometimes you have to be a bit careful to look under the right section for the relevant transition - the first section can often be another excited state that you're not looking for, but all the data is there, and sorted by intensity :)
• IAEA Nuclide Browser mobile app - https://play.google.com/store/apps/deta ... s.nuclides - same data as nudat3 but handy on your phone with a decent expert search feature I use a lot to help identify more unusual gamma lines
• IAEA Livechart - https://www-nds.iaea.org/relnsd/vcharth ... tHTML.html - same data, but with a nice web interface
• OECD NEA JANIS - https://www.oecd-nea.org/jcms/pl_39910/janis - Java program with all types of data from several different nuclear data libraries and a nice interactive Segre chart of nuclides
• JANIS Web https://www.oecd-nea.org/janisweb/ - as above but with a web based interface that I've never quite worked my way around properly but can be occasionally useful when accessing from a machine without the Java environment

[Rob Tayloe]

Steven, I recommend that the above post be moved (or contents copied) to the Resource / Documents page for easier future reference -

viewtopic.php?f=17&t=14

[sgt_bear]

If you really like the site/layout, you can still can try to access it via waybackmachine:
http://web.archive.org/web/20240120182 ... lu.se/toi/

Don't know if everything works, but on the first look a lot is there


List of snapshots:
(http://web.archive.org/web/202406010000 ... lu.se/toi/)

[stamasd]

Yeah unfortunately the archived versions of the site don't work as it seems only the web interface was preserved, not the underlying database. So searching doesn't work.
I've been using the nudat3 as a (poor) replacement, but it misses the reverse search by energy. That was very useful as you often come across an unknown peak and it would help narrow it down to candidates. I have not found a replacement for that. If you do know of one, please post it here.

[stamasd]

Anyway, here are a few resources I found that provide search by energy:
https://atom.kaeri.re.kr/old/gamrays.html
https://wwwndc.jaea.go.jp/NuC/sbygame.html

[ColoRad-o]

I strongly recommend the Lara database, at http://www.lnhb.fr/home/nuclear-data/module-lara/

[jneilson]

I've been using the nudat3 as a (poor) replacement, but it misses the reverse search by energy. That was very useful as you often come across an unknown peak and it would help narrow it down to candidates. I have not found a replacement for that. If you do know of one, please post it here.

Nudat3's search is at https://www.nndc.bnl.gov/nudat3/indx_dec.jsp

I don't generally use the web version though - it's a little buggy and the display as web page option doesn't seem to work for me, but it works if I toggle to the formatted file option.

Instead, however, I generally use the IAEA Nuclide Browser app to do "reverse search" (lookup by energy). It's under the "Expert" tab in the app.