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Homework Help: Nebula of pure hydrogen

  1. Oct 23, 2007 #1
    1. The problem statement, all variables and given/known data

    Consider a nebula of pure hydrogen which is completely ionized and in steady-state (# ionizations/sec = # recombinations/sec) at a constant temperature and density. Suppose the source of the ionizing radiation suddenly “turns off”. Find and graph the electron density as a function of time, Log ne versus Log t, using:

    Note – do not include captures into the ground state, as that will emit photons that will ionize another atom someplace else - B is what you need to use. Also the “recombination time” is just a first-order, which depends on ne. For finding ne versus time you cannot use a constant recombination rate.

    2. Relevant equations

    I tried to figure out but I really don't know!

    3. The attempt at a solution

    I am sorry I don't know!
     
  2. jcsd
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