1. May 29, 2008 #1

   praharmitra

   

   well, thats the heading of a project i am doing....i need some help on neutron detectors...
   
   how they are dectected and what is the probable graph of count rate vs, pulse height that i might get for a nuclar fission reaction of U-235........
   
   can any one help?

    

   praharmitra, May 29, 2008
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3. Jun 22, 2009 #2

   thunderbolt

   

   i am doing similar project

    

   thunderbolt, Jun 22, 2009
4. Jun 22, 2009 #3

   Astronuc

   

   Staff: Mentor

   Is one doing a fission detector or a neutron detector, and is one doing detections of neutrons ex-reactor, or for a power reactor (in-core or ex-core) detector?
   
   The application determines the type of detector.
   
   For example there are fission detectors that use the fission reaction. There are detectors which use the (n,p) scattering.
   
   And there are detectors that use Rh or V (n-capture).
   
   See - http://www.tpub.com/content/doe/h1013v2/css/h1013v2_76.htm

    

   Astronuc, Jun 22, 2009
5. Jun 22, 2009 #4

   Bob S

   

   There are several detectors of thermal neutrons. A boron-10 proportional counter uses BF₃ gas. See
   http://www.orau.org/PTP/collection/proportional counters/bf3info.htm
   Helium-3 is also used in gas proportional chambers. When it absorbs a neutron, it fissions to a proton plus tritium, plus about 763 KeV of kinetic energy. In both cases, the pulse height is taken off the anode wire using capacitor coupling, and is independent of the neutron energy. Lithium-6 is also used.

    

   Bob S, Jun 22, 2009

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