Download, compile and run the Big Bang Nucleosynthesis Code
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Compile the code with your fortran90 compiler.
Report in the Reaction Network Code discussion thread your success with machine information.
Generate light element abundance predictions for a range of initial baryon-to-photon ratios, $\eta$.
Create the “Schramm Plot”
![Schramm Plot: Please note that these lines have a finite thickness. This thickness denotes the uncertainties from nuclear reaction rates, propagated into the abundance predictions. Schramm Plot: Please note that these lines have a finite thickness. This thickness denotes the uncertainties from nuclear reaction rates, propagated into the abundance predictions.](/talent/lib/exe/fetch.php?w=100&tok=912391&media=schrammplot.jpg)
Repeat with $N_\nu = 2$ and $4$.