21. Manley, one the attendees, was tasked with learning more about the properties of fast neutrons . 22. That will avoid the background noise caused by thermal and fast neutrons and gamma rays. 23. Typical fast neutron detectors are liquid scintillators, 4-He based noble gas detectors and plastic detectors. 24. Fast neutron therapy utilizes high energy neutrons typically greater than 20 MeV to treat cancer.25. The most common is thorium, which absorbs a fast neutron and decays into Uranium 233. 26. A few reactors ( fast neutron reactors ) and all nuclear weapons rely on fast neutrons . 27. A few reactors ( fast neutron reactors ) and all nuclear weapons rely on fast neutrons. 28. A different model called the displacement spike was proposed for fast neutron bombardment of heavy elements. 29. These fast neutrons do not cause fission as readily as slower ( less energetic ) ones. 30. Neutron temperature # Fast neutrons . talk ) 23 : 41, 25 April 2011 ( UTC)
