Fast Neutron Scattering Analysis - University of Cape Town

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<strong>Neutron</strong> elastic scattering (a) 12 C(n,n) 12 C Differential cross section dσ/dΩ (b sr -1 ) 4.0 3.0 2.0 1.0 0.0 1.0 0.5 0.0 -0.5 1.0 -1.0 2.0 3.0 6.0 5.0 4.0 E o (MeV) 7.0 8.0 cos Θ ) E scattered / E incident for neutron 1.0 0.8 0.6 0.4 0.2 Kinematics A=1 0.0 0 30 60 90 120 150 180 <strong>Neutron</strong> laboratory scattering angle (degrees) A=207 A=56 A=27 A=16 A=14 A=12 A=10 A=7 A=4 A=2 (b) 14 N(n,n) 14 N dσ/dΩ (b sr -1 ) 4.0 3.0 2.0 1.0 0.0 1.0 0.5 0.0 -0.5 1.0 -1.0 (c) 16 O(n,n) 16 O dσ/dΩ (b sr -1 ) 4.0 3.0 2.0 1.0 cos Θ 0.0 1.0 0.5 0.0 -0.5 1.0 -1.0 2.0 2.0 3.0 3.0 5.0 4.0 E o (MeV) 6.0 6.0 5.0 4.0 E o (MeV) 7.0 7.0 8.0 8.0 cos Θ
Pulse height (L) channel 60 40 20 0 14E3 γ 7E3 0 0 10 20 30 40 50 60 Pulse shape (S) channel Counts 80E3 40E3 γ n 0 γ n 50E3 25E3 Pulse height (L) channel 0 20 40 60 n 0
Page 1: Contraband detection, using neutron
Page 5 and 6: Bombing of Pan Am Flight 103 (Boein
Page 7 and 8: Common approaches to detect hidden
Page 9 and 10: Oxygen concentration (moles cm -3 )
Page 11 and 12: Neutron - based interrogation metho
Page 13 and 14: Thermal neutron capture thermal neu
Page 15 and 16: Fast neutron inelastic scattering m
Page 17 and 18: Neutrons in, neutrons out fast neut
Page 19 and 20: National Accelerator Centre, near C
Page 21: 1500 mm 300 mm 600 mm 400 mm 310 mm
Page 27 and 28: θ lab : 150 o 45 o Parameter: Puls
Page 29 and 30: Scattering signatures measured for
Page 31 and 32: The sensitivity of the approach for
Page 33 and 34: P x (x,k) represents the degree to
Page 35 and 36: Ammonium Nitrate Composition B Comp
Page 37 and 38: A group probability function indica
Page 39 and 40: Location of contraband in FNSA meas
Page 41 and 42: Results from a Rotational-Translati
Page 43 and 44: Detection of explosives in airline
Page 46 and 47: Detection of illicit drugs in airli
Page 48 and 49: FNSA screening times per suspect it

Fast Neutron Scattering Analysis - University of Cape Town

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