Jin Whan Bae

should be as simple as changing [this line](https://github.com/openmc-dev/openmc/blob/d8dbd9bfca5f9e8faf992422149ff0573fb49551/openmc/material.py#L1075C13-L1075C13) by a particle-specific decay constant, something like: ``` chain = Chain.from_xml(chain_file) particle_type = xxx nucs_in_mat = [q.name for q in material.nuclides] decay_const_dict...

This is what I used, but I feel like it's not the most appropriate: ``` if not smps: # covariance data does not exist print('Covariance data does not exist!') pendf...

haha nooo take your time you're moving incredibly quickly I'm trying to catch up

[i] is integer, [f] is float [MCNP](https://svalinn.github.io/DAGMC/usersguide/codes/dag-mcnp.html): - all volumes must belong to a group - normal materials: `mat:[i]/rho:[f]` - vacuums:`mat:Vacuum` - graveyard: `mat:Graveyard` [Shift](https://gist.github.com/jbae11/c7c74c56dcea4b9b6d4891991f530065) - normal matierals: `mat:[i]` -...

I might be wrong (and in a lot of cases am), but wouldn't doing `nuclides=my_material.get_nuclides()` have the risk of not taking into account secondary nuclides (fission / activation products, decay...

hmm I can imagine something like a recursive function to get all the chains and resulting nuclides from a 'fresh composition' - I think it'll be a good function in...

okay so I've been comparing the results with some ORIGEN results (that match with the FISPACT results from the FNS benchmark) and I found that: - we have to normalize...

I've been playing around with the FNS data and this is what I have so far, it's obviously very wrong, but I'm not sure if it is due to some...

implementation [here](https://github.com/jbae11/openmc_activator/blob/main/openmc_activator.py)

That was a great idea - looks like a lot of the craziness disappeared. I'm probably still messing up something with scaling cause it still looks like I'm undercalculating the...