Experimental neutron spectra measured by BC501A at TIARA1992/12 [68c150-00]
 Proton Energy : 68 MeV
 Shielding Material :150.0cm thick Concrete    
 Iron collimator (10.9cm diam.) :  0cm thick
 Distance from Li target to the shield surface(0cm thickness) = 403 cm
 Number of monoenergetic peak neutrons of p-7Li neutron source
    (case-a) =4.00E+09 [sr/micro-Coulomb]
              2.46E+04 [cm^2/micro-Coulomb] at 403 cm
 Measured position :  beam line          
 Reference :Nucl. Sci. Eng. 124(1996)p228     , JAERI-Data/Code97-020(1997)

Graph
 Neutron Energy [eV]
 Neutron Flux [n/cm^2/micro-Coulomb/lethargy]
 Absolute Error [n/cm^2/micro-Coulomb/lethargy]
  6.899E+07  4.219E+00  2.187E-01
  6.699E+07  9.864E+00  3.778E-01
  6.499E+07  1.682E+01  3.018E-01
  6.299E+07  2.072E+01  2.816E-01
  6.099E+07  1.844E+01  4.484E-01
  5.899E+07  1.210E+01  3.656E-01
  5.699E+07  6.539E+00  1.538E-01
  5.499E+07  4.037E+00  1.936E-01
  5.299E+07  3.649E+00  1.979E-01
  5.099E+07  3.848E+00  1.726E-01
  4.899E+07  3.880E+00  1.799E-01
  4.699E+07  3.553E+00  1.907E-01
  4.499E+07  2.958E+00  1.819E-01
  4.350E+07  2.507E+00  1.727E-01
  4.250E+07  2.286E+00  1.705E-01
  4.150E+07  2.154E+00  1.764E-01
  4.050E+07  2.107E+00  1.935E-01
  3.950E+07  2.116E+00  2.169E-01
  3.850E+07  2.143E+00  2.333E-01
  3.750E+07  2.153E+00  2.380E-01
  3.650E+07  2.118E+00  2.304E-01
  3.550E+07  2.030E+00  2.146E-01
  3.450E+07  1.893E+00  1.976E-01
  3.350E+07  1.724E+00  1.856E-01
  3.250E+07  1.554E+00  1.802E-01
  3.150E+07  1.417E+00  1.761E-01
  3.050E+07  1.344E+00  1.664E-01
  2.950E+07  1.338E+00  1.520E-01
  2.850E+07  1.372E+00  1.435E-01
  2.750E+07  1.396E+00  1.490E-01
  2.650E+07  1.375E+00  1.684E-01
  2.550E+07  1.305E+00  1.905E-01
  2.449E+07  1.206E+00  2.017E-01
  2.349E+07  1.104E+00  1.891E-01
  2.249E+07  1.008E+00  1.521E-01
  2.149E+07  9.192E-01  1.000E-01
  2.049E+07  8.301E-01  5.036E-02
  1.949E+07  7.348E-01  9.630E-02
  1.849E+07  6.316E-01  1.371E-01
  1.749E+07  5.323E-01  1.413E-01
  1.649E+07  4.606E-01  1.072E-01
  1.549E+07  4.339E-01  5.644E-02
  1.449E+07  4.465E-01  4.556E-02
  1.349E+07  4.733E-01  2.382E-02
  1.249E+07  4.922E-01  5.187E-02
  1.149E+07  4.984E-01  6.799E-02
  1.049E+07  5.006E-01  6.646E-02
  9.487E+06  5.143E-01  5.413E-02
  8.485E+06  5.508E-01  3.059E-02
  7.483E+06  5.917E-01  5.520E-02
  6.481E+06  5.733E-01  1.587E-01