Dear Gyan,

thank you for your answer, but I fear this does not quite meet my needs... I explored Janis and Talys softwares and found many informations, including about gamma rays. But I am searching for gamma transitions (decays, cascades), and not only energies and intensities (like for spectrometry). Maybe these properties are included in softwares you are citing, but I could not find them.

Arnaud.

http://ie.lbl.gov/toi/nucSearch.asp

and mahy Mirrows of this site

Hi Arnaud, 

You should definitely use the ENSDF  http://www.nndc.bnl.gov/ensdf/ which is standard database in the feild regularily updated by recently published data. Ideal generator should parse standard ENSDF file. It was claimed that Decay4 http://arxiv.org/abs/nucl-ex/0104018 is able to do this function but one of author has removed the code of generator from the internet.

You can also contact your former boss  Francois Mauger, who is working on new physics decay generator able to take and parse ENSDF file.

http://www.nndc.bnl.gov/nudat2/indx_adopted.jsp

You can consult:

http://laraweb.free.fr/

but I don't know if you can extract the data in the format you need.

you can look into the site http://www.nndc.bnl.gov/nudat2/ and the links available there.

www.tunl.duke.edu/nucldata/links.shtml - is simpler one also

You can find the answer in nuclear data sheet