bbnex
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bbnex [2014/05/02 13:18] cyburt |
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| - | ====== TALENT ====== | + | ====== EXERCISES ====== |
| - | ===== Training in Advanced Low Energy Nuclear Theory: EXERCISES ===== | + | **[[RXNnetworkEX|Reaction Networks]]**, **[[NuclPhysInput|Nucl Physics Input]]**, **[[HydroEX|Hydrodynamics]]**, **[[BBNEX|BBN]]**, **[[AnlyPlot|Abundances, Analysis and Plotting]]** |
| - | [[http://www.nucleartalent.org|{{:talent.png?650|Nuclear TALENT}}]] | + | ==== Big Bang Nucleosynthesis Exercises ==== |
| - | [[RXNnetworkEX|Reaction Networks]], [[HydroEX|Hydrodynamics]],[[BBNEX|BBN]], [[AnlyPlot|Abundances, Analysis and Plotting]], [[NuclPhysInput|Nuclear Physics Input]] | + | |
| - | ==== Reaction Network Exercises ==== | + | |
| <box 80% left orange|**(Pre-Course Assignment)**> | <box 80% left orange|**(Pre-Course Assignment)**> | ||
| Line 14: | Line 12: | ||
| - Generate light element abundance predictions for a range of initial baryon-to-photon ratios, $\eta$. | - Generate light element abundance predictions for a range of initial baryon-to-photon ratios, $\eta$. | ||
| * Create the "Schramm Plot"{{:schrammplot.jpg?direct&100|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.}} | * Create the "Schramm Plot"{{:schrammplot.jpg?direct&100|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.}} | ||
| + | - Repeat with $N_\nu = 2$ and $4$. | ||
| </box> | </box> | ||
| - | |||
| - | <box 80% left blue|**(During-Course Assignment)**> | ||
| - | |||
| - | **Run a reaction network with given nuclear input for:** | ||
| - | |||
| - | - Fixed temperature and density | ||
| - | * Try various temperatures and densities | ||
| - | * Try different network sizes | ||
| - | * Swap out a reaction rate with a different version | ||
| - | * Vary initial composition (X, Y, Z or Ye) | ||
| - | * Let evolve until Nuclear Statistical Equilibrium is reached | ||
| - | - Temperature/density trajectories | ||
| - | |||
| - | * $ T(t) = T(0)\exp{(-t/\tau)} $ | ||
| - | |||
| - | * or $ T(t) = \frac{T(0)}{(1+t/(n\tau))^n} $ | ||
| - | |||
| - | * $ \rho (t) = \rho (0) [1.+f_{\nu}(T(t))](T(t)/T(0))^3$ | ||
| - | * How do initial conditions affect the resulting nucleosynthesis | + | ~~DISCUSSION|Big Bang Nucleosynthesis Exercises Discussion~~ |
| - | * How does the trajectory form affect the results? | + | |
| - | </box> | + | |
| - | ~~DISCUSSION|Reaction Network Exercises Discussion~~ | + | |
bbnex.txt · Last modified: 2014/05/15 15:13 by cyburt
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