Paul Kienzle

For sld I'm using: ``` sld = ρ/m N_A re (f1 + f2 j) ``` with mass density ρ, molar mass m, Avogadro number N_A, and electron radius re. So...

BTW, this is given in the right hand column of the "related forms" table further down in the page: http://gisaxs.com/index.php/Absorption_length#Related_forms

Do we also need a swelling fraction for the protein which increases volume and decreases contrast as solvent is incorporated? Deuteration can be handled using H-D ratios in the underlying...

We may want to preserve the parse tree for mixtures in the `Formula` class. This would let us query the D:H ratio in the final mixture component when computing the...

You can fake 70%deuterated in the formula by replacing all H with (H.3D.7). Similarly, for 90%exchanged can replace H[1] with (H.1H[1].9). For both %exchange and %deuterated the exchange applies first,...

Added a comment in the docs, but should probably flag inputs with high fluence.

Added warning in the web calculator for all b mode rows and t daughter products.

PubChem also gives 157 ± 7 years [here](https://pubchem.ncbi.nlm.nih.gov/element/Silicon#section=Atomic-Mass-Half-Life-and-Decay&fullscreen=true). This is traceable to NuBASE2020. Trying to chase down the values for NuDAT, I did a search in the [ENSDF database](https://www.nndc.bnl.gov/ensdf/) for...

I did a comparison between activation.dat and the NUBASE2020 half-lives. The following isomers are coded differently. Mostly a few 'm' isomers should have been 'm2': ```python code_override = { "Pb-204m":...