Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

H atom ionization SFA

  1. Apr 2, 2013 #1
    Hi! I have some trouble with atomic unit. I have a laser pulse with the wavelength of ##800 nm## at the
    peak intensity of ##1.0*10^{14} W/cm^{2}##. I'd like to calculate the corresponding electric field ##E_0##. I use the formula ##I=0.5Cε_0{E_{0}}^2## and ##1 a.u.=5.14*10^{11} V/m## to obtain ##E_0=5.3*10^{-6}##, which is much smaller than the expected value 0.1.
    Another question is about the energy spectra. It is written as ##\frac{\partial P}{\partial E}##. Is the P here means the probability density or the probability?
    Thanks!
     
  2. jcsd
  3. Apr 2, 2013 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    Which units does E0 have and how did you calculate it? V/m is an electric field strength.
    What do you mean with "expected value 0.1"?

    Are you sure P is a probability, not a power? If yes, P would have to be a probability and its derivative in E is the density in E.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook