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Proton spallation

  1. Jul 11, 2010 #1
    Howdy folks,
    i have read that high energy protons striking a target nucleus (say silicon) can produce neutrons through spallation. Can someone point me to some literature, that gives the following details.

    1) What energy neutrons are produced for a given input proton energy
    2) Probabilities of a nuclear reaction as opposed to ionisation loss for incident protons
    3) What happens if the incident protons are replaced with alpha particles

    I am interested in proton energies ranging from 10 MeV - 100 GeV.

    Thanks guys.
     
  2. jcsd
  3. Jul 11, 2010 #2
  4. Jul 12, 2010 #3
    Thanks Bob S
     
  5. Jul 14, 2010 #4
    This article ("Spallation Neutron production Measurements" by Zucker et. al) from Brookhaven National Laboratory (open "Quick view") compares experiment and theory for the number of spallation neutrons produced for various energy protons on tungsten and lead targets, and finds about 17 neutrons per GeV in lead, and about 20 neutrons per GeV in tungsten.

    http://docs.google.com/viewer?a=v&q...UtqxOs&sig=AHIEtbTsGlVAHbm6a3lSe_rYQiFOG4YlHg

    See Fig 6 and Table 1.

    [added] The yields per GeV plateau between 1 and 2 GeV, and drop off at higher energies due to pion production.

    Bob S
     
    Last edited: Jul 14, 2010
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