20-Ca-40

Reaction 0.0253-eV Maxwellian
Average
g-factor Resonance
Integral
14-MeV Fiss. Spec.
Average
total 3.469 (b) 3.864 (b) 1.114 2.153 (b) 2.880 (b)
elastic 3.061 (b) 3.456 (b) 1.129 993.8 (mb) 2.701 (b)
inelastic ( E-thr = 3.437 MeV ) 243.0 (mb) 37.44 (mb)
(n,2n) ( E-thr = 16.04 MeV ) 4.088 (nb)
(n,na) ( E-thr = 7.217 MeV ) 44.03 (mb) 7.920 (μb)
(n,np) ( E-thr = 8.538 MeV ) 484.5 (mb) 213.4 (μb)
capture 407.6 (mb) 407.8 (mb) 1.001 212.8 (mb) 506.2 (μb) 1.387 (mb)
(n,p) ( E-thr = 542.4 keV ) 236.4 (mb) 98.61 (mb)
(n,a) 0.000 (b) 0.000 (b) 256.8 (mb) 150.4 (mb) 41.59 (mb)
MT = 600 ( E-thr = 542.4 keV ) 884.2 (μb) 21.97 (mb)
MT = 601 ( E-thr = 572.9 keV ) 842.9 (μb) 37.09 (mb)
MT = 602 ( E-thr = 1.363 MeV ) 356.2 (μb) 13.92 (mb)
MT = 603 ( E-thr = 1.456 MeV ) 408.0 (μb) 2.730 (mb)
MT = 604 ( E-thr = 2.228 MeV ) 85.02 (μb) 969.1 (μb)
MT = 605 ( E-thr = 2.551 MeV ) 621.1 (μb) 1.714 (mb)
MT = 606 ( E-thr = 2.641 MeV ) 313.8 (μb) 1.766 (mb)
MT = 607 ( E-thr = 2.664 MeV ) 386.4 (μb) 1.642 (mb)
MT = 608 ( E-thr = 2.699 MeV ) 381.7 (μb) 1.324 (mb)
MT = 609 ( E-thr = 2.860 MeV ) 394.5 (μb) 915.2 (μb)
MT = 610 ( E-thr = 2.890 MeV ) 390.6 (μb) 762.0 (μb)
MT = 611 ( E-thr = 2.891 MeV ) 687.7 (μb) 1.168 (mb)
MT = 612 ( E-thr = 3.000 MeV ) 711.6 (μb) 778.6 (μb)
MT = 613 ( E-thr = 3.023 MeV ) 300.8 (μb) 948.9 (μb)
MT = 614 ( E-thr = 3.149 MeV ) 157.6 (μb) 33.70 (μb)
MT = 615 ( E-thr = 3.183 MeV ) 319.4 (μb) 599.5 (μb)
MT = 616 ( E-thr = 3.235 MeV ) 122.1 (μb) 201.6 (μb)
MT = 617 ( E-thr = 3.342 MeV ) 203.5 (μb) 356.6 (μb)
MT = 618 ( E-thr = 3.359 MeV ) 654.5 (μb) 578.3 (μb)
MT = 619 ( E-thr = 3.369 MeV ) 313.0 (μb) 441.8 (μb)
MT = 620 ( E-thr = 3.399 MeV ) 678.2 (μb) 391.3 (μb)
MT = 621 ( E-thr = 3.400 MeV ) 682.1 (μb) 450.9 (μb)
MT = 622 ( E-thr = 3.421 MeV ) 523.2 (μb) 498.0 (μb)
MT = 623 ( E-thr = 3.494 MeV ) 445.6 (μb) 50.31 (μb)
MT = 624 ( E-thr = 3.568 MeV ) 514.2 (μb) 393.0 (μb)
MT = 625 ( E-thr = 3.604 MeV ) 663.0 (μb) 283.8 (μb)
MT = 626 ( E-thr = 3.647 MeV ) 509.4 (μb) 345.8 (μb)
MT = 627 ( E-thr = 3.721 MeV ) 594.1 (μb) 122.4 (μb)
MT = 628 ( E-thr = 3.731 MeV ) 547.4 (μb) 244.6 (μb)
MT = 629 ( E-thr = 3.750 MeV ) 503.1 (μb) 293.0 (μb)
MT = 630 ( E-thr = 3.768 MeV ) 352.0 (μb) 176.0 (μb)
MT = 631 ( E-thr = 3.776 MeV ) 501.5 (μb) 280.9 (μb)
MT = 632 ( E-thr = 3.853 MeV ) 496.8 (μb) 248.3 (μb)
MT = 633 ( E-thr = 3.918 MeV ) 535.6 (μb) 180.1 (μb)
MT = 634 ( E-thr = 3.995 MeV ) 488.1 (μb) 197.5 (μb)
MT = 635 ( E-thr = 4.022 MeV ) 486.5 (μb) 189.4 (μb)
MT = 636 ( E-thr = 4.043 MeV ) 527.8 (μb) 147.2 (μb)
MT = 637 ( E-thr = 4.068 MeV ) 324.7 (μb) 136.9 (μb)
MT = 638 ( E-thr = 4.077 MeV ) 627.6 (μb) 135.5 (μb)
MT = 639 ( E-thr = 4.117 MeV ) 480.7 (μb) 162.8 (μb)
MT = 649 ( E-thr = 4.189 MeV ) 217.4 (mb) 3.780 (mb)
MT = 800 0.000 (b) 0.000 (b) 132.2 (mb) 424.5 (μb) 32.74 (mb)
MT = 801 0.000 (b) 0.000 (b) 18.03 (mb) 223.9 (μb) 2.292 (mb)
MT = 802 0.000 (b) 0.000 (b) 27.16 (mb) 598.8 (μb) 2.756 (mb)
MT = 803 ( E-thr = 480.9 keV ) 569.4 (μb) 914.4 (μb)
MT = 804 ( E-thr = 761.3 keV ) 354.0 (μb) 648.8 (μb)
MT = 805 ( E-thr = 1.075 MeV ) 577.9 (μb) 449.5 (μb)
MT = 806 ( E-thr = 1.459 MeV ) 480.8 (μb) 246.2 (μb)
MT = 807 ( E-thr = 1.473 MeV ) 570.0 (μb) 179.8 (μb)
MT = 808 ( E-thr = 1.564 MeV ) 550.3 (μb) 195.5 (μb)
MT = 809 ( E-thr = 1.815 MeV ) 348.0 (μb) 120.1 (μb)
MT = 810 ( E-thr = 1.824 MeV ) 657.4 (μb) 150.3 (μb)
MT = 811 ( E-thr = 1.901 MeV ) 400.3 (μb) 93.27 (μb)
MT = 812 ( E-thr = 2.008 MeV ) 630.5 (μb) 63.68 (μb)
MT = 813 ( E-thr = 2.244 MeV ) 332.0 (μb) 54.07 (μb)
MT = 814 ( E-thr = 2.288 MeV ) 465.2 (μb) 68.08 (μb)
MT = 815 ( E-thr = 2.331 MeV ) 535.0 (μb) 52.36 (μb)
MT = 816 ( E-thr = 2.505 MeV ) 405.2 (μb) 40.58 (μb)
MT = 817 ( E-thr = 2.599 MeV ) 526.5 (μb) 46.70 (μb)
MT = 818 ( E-thr = 2.635 MeV ) 624.3 (μb) 44.67 (μb)
MT = 819 ( E-thr = 2.715 MeV ) 434.9 (μb) 32.98 (μb)
MT = 820 ( E-thr = 2.764 MeV ) 208.9 (μb) 14.62 (μb)
MT = 821 ( E-thr = 2.896 MeV ) 381.2 (μb) 19.55 (μb)
MT = 822 ( E-thr = 2.949 MeV ) 587.3 (μb) 23.01 (μb)
MT = 823 ( E-thr = 2.959 MeV ) 396.9 (μb) 19.81 (μb)
MT = 824 ( E-thr = 3.071 MeV ) 581.1 (μb) 19.12 (μb)
MT = 825 ( E-thr = 3.128 MeV ) 501.4 (μb) 17.60 (μb)
MT = 826 ( E-thr = 3.218 MeV ) 595.1 (μb) 18.42 (μb)
MT = 827 ( E-thr = 3.314 MeV ) 589.7 (μb) 15.88 (μb)
MT = 828 ( E-thr = 3.327 MeV ) 369.6 (μb) 9.947 (μb)
MT = 829 ( E-thr = 3.384 MeV ) 490.3 (μb) 11.81 (μb)
MT = 830 ( E-thr = 3.426 MeV ) 200.0 (μb) 5.118 (μb)
MT = 831 ( E-thr = 3.438 MeV ) 512.2 (μb) 11.47 (μb)
MT = 832 ( E-thr = 3.467 MeV ) 365.3 (μb) 7.963 (μb)
MT = 849 ( E-thr = 3.552 MeV ) 134.9 (mb) 207.0 (μb)

These cross sections are calculated from JENDL-4.0 at 300K.
The background color of each cell noted a cross section means the order of the cross-section value.
The unit of cross section, (b), means barns, and SI prefixes are used as following.
(kb) → 103(b),   (mb) → 10−3(b),  (μb) → 10−6(b),  (nb) → 10−9(b).

Maxwellian Average :
σmacs(T) =
2
 
 
π
EU
 
EL
σ(E,T) ⋅ E ⋅ exp (
E
  
kBT
) dE
 
EU
 
EL
E ⋅ exp (
E
  
kBT
) dE
,
where T denotes the temperature, and kB the Boltzmann constant. The upper and lower limits of integration, EL and EU are set to 10−5 eV and 10 eV, respectively.
Resonance Integral :
σri(T) =
EU
 
EL
σ(E,T) ⋅
1
 
E
dE ,
with  EL = 0.5 eV  and  EU = 10 MeV.
U-235 Thermal Fission-Neutron Spectrum Average (Fiss. Spec. Average) :
σfacs(T) =
EU
 
EL
σ(E,T) ⋅
 
4
 
πa3b
⋅ exp (
ab E
     
4 a
) ⋅ sinh
 
bE
dE
 
EU
 
EL
 
4
 
πa3b
⋅ exp (
ab E
     
4 a
) ⋅ sinh
 
bE
dE
,
with  EL = 10−5 eV  and  EU = 20 MeV. The parameters a and b are 0.988 MeV and 2.249 MeV−1, respectively.
Westcott g-factor :
g(T) =
σmacs(T)
 
σ(0.0253 eV,T)
 .