def theU235_alpha
      array = Array.new(23)

      array[0] = 6.5057E-01
      array[1] = 5.1264E-01
      array[2] = 2.4384E-01
      array[3] = 1.3850E-01
      array[4] = 5.544E-02
      array[5] = 2.2225E-02
      array[6] = 3.3088E-03
      array[7] = 9.3015E-04
      array[8] = 8.0943E-04
      array[9] = 1.9567E-04
      array[10] = 3.2535E-05
      array[11] = 7.5595E-06
      array[12] = 2.5232E-06
      array[13] = 4.9948E-07
      array[14] = 1.8531E-07
      array[15] = 2.6608E-08
      array[16] = 2.2398E-09
      array[17] = 8.1641E-12
      array[18] = 8.7797E-11
      array[19] = 2.5131E-14
      array[20] = 3.2176E-16
      array[21] = 4.5038E-17
      array[22] = 7.4791E-17

      array
    end
def theU235_alpha
      array = Array.new(23)

      array[0] = 6.5057E-01
      array[1] = 5.1264E-01
      array[2] = 2.4384E-01
      array[3] = 1.3850E-01
      array[4] = 5.544E-02
      array[5] = 2.2225E-02
      array[6] = 3.3088E-03
      array[7] = 9.3015E-04
      array[8] = 8.0943E-04
      array[9] = 1.9567E-04
      array[10] = 3.2535E-05
      array[11] = 7.5595E-06
      array[12] = 2.5232E-06
      array[13] = 4.9948E-07
      array[14] = 1.8531E-07
      array[15] = 2.6608E-08
      array[16] = 2.2398E-09
      array[17] = 8.1641E-12
      array[18] = 8.7797E-11
      array[19] = 2.5131E-14
      array[20] = 3.2176E-16
      array[21] = 4.5038E-17
      array[22] = 7.4791E-17

      array
    end
theU235_alpha is alpha in ANS-5.1-1979 Table 7.