1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Nuclear physics

  1. Jan 29, 2016 #1
    1. The problem statement, all variables and given/known data
    In a particular nuclear reaction, a neutron moving at 3.6×105ms−1 has a 70% chance of initiating a nuclear fusion reaction. Which of the following options is a possible probability of a neutron moving at 2.2×105ms−1 initiating the same nuclear reaction?

    I wouldn't be asking this if I really didn't know where to start. I don't even know which formula to use or how to begin solving this. Any help would be greatly appreciated, thanks!
  2. jcsd
  3. Jan 29, 2016 #2


    User Avatar
    2017 Award

    Staff: Mentor

    Where are the options?
    Are there any reactions where you know if the cross-section is higher or lower for higher/lower speeds?
  4. Jan 29, 2016 #3
    Yeah, the options are
    A) 70%
    B) 0%
    C) 82%
    D) 56%
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Threads - Nuclear physics Date
Fermi Decay May 16, 2017
Nuclear Physics and energy levels Sep 19, 2016
Rutherford Scattering Aug 31, 2016
Determine half life from gamma radiation May 16, 2016