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Hello, I am a new user and wanted to study coupling between an electron spin and a radioactive isotope of protactinium (229Pa). However, in the isotope data text document, there is no information for this isotope. I was wondering if there is a way to update the isotope data text document so that I can model this interaction? I tried just adding a new line with the relevant information and saved the document, but when I run the code below, I get the following error. I was able to use the command 'isotopes' in the matlab command prompt and the isotope information was updated there, but the code still wouldn't work. I was wondering if anyone has any insight on this. Thank you!

Line I added to isotopedata.txt:
91 229 * Pa protactinium 2.5 1.0 100.0 +3.0

Matlab Code I am running:
Sys.S = 1;
Sys.Nucs = '229Pa';
Sys.D = [-100 -200 300];
Ori = [0 0]; FieldRange = [0 150];
levelsplot(Sys,Ori,FieldRange);

Error I get:
Error using nucdata
Problem in isotopes list, entry 1 ('229Pa'): Please specify one of 0Pa.
Error in validatespinsys

After running command 'isotopes', I do see my change implemented in the gui, but still get the error.

In addition to adding your Pa isotope, you need to remove the dummy Pa line that starts with 91 0 * Pa protactinium.

If you provide a reference for the isotope data, we are happy to add this isotope to the isotope list.