1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Can't do an integral

  1. Oct 4, 2006 #1
    p(r) is proportional too (1/r)Exp(-r/R). r is the variable.

    I'm trying to normalise this function (R is proton radius), so I'm trying to get the integral between infinity and -infinity = 1 so I can find the normalisation constant. I don't know how to do this integral I've tried by parts but it seems there are discontuinities. I'm probably missing something obvious, can sombody point me on the right track?
    Last edited: Oct 4, 2006
  2. jcsd
  3. Oct 4, 2006 #2


    User Avatar
    Homework Helper

    :wink: Non-elementary solution.

    http://mathworld.wolfram.com/ExponentialIntegral.html" [Broken]
    Last edited by a moderator: May 2, 2017
  4. Oct 4, 2006 #3
    Thanks, I can't see how to normalise this function however.
  5. Oct 4, 2006 #4
    Probably you're integrating from [itex]r=0[/itex] to [itex]r=\infty[/itex], not over the whole range of r.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Can't do an integral