B-4.
Fission product data: Thermal neutron cross sections, resonance integrals, and Westcott factors
 
 
     Nuclide       
 
  Type
 
  Cross Section
  σx [barn]
 
  Westcott Factor
  g
 
 
  Resonance Integral
  RI [barn]
 
  Source
 
  36-Kr-82
  σγ
  19 ± 4
  1.0004
  156 ± 20
  [1]
  36-Kr-83
  σγ
  197 ± 10
  0.9979
  157 ± 25
  [1]
  36-Kr-84
  σγ
  σγ(g)
  σγ(m)
  0.110 ± 0.015
  0.042 ± 0.004
  0.090 ± 0.013
  1.0004
  
  
  2.43 ± 0.20
  
  
  [1]
  
  
  36-Kr-85
  σγ
  1.66 ± 0.20
  0.9996
  1.8 ± 1.0
  [1]
  38-Sr-90
  σ
  0.0104 ± 0.0014
  1.000
  0.104 ± 0.016
  [1]
  40-Zr-90
  σγ
  0.077 ± 0.016
  1.0003
  0.17 ± 0.02
  [1]
  40-Zr-91
  σγ
  0.83 ± 0.08
  1.0003
  5.76 ± 0.40
  [1]
  40-Zr-92
  σγ
  0.26 ± 0.08
  1.0004
  0.64 ± 0.11
  [2]
  40-Zr-93
  σγ
  0.696
  1.0007
  17.8
  [3]
  40-Zr-94
  σγ
  0.0494 ± 0.0017
  1.0004
  0.280 ± 0.010
  [1]
  40-Zr-95
  σ
  1.2
  1.0004
  7.79
  [4]
  40-Zr-96
  σγ
  0.0229 ± 0.0010
  1.0006
  5.28 ± 0.11
  [1]
  41-Nb-94
  σ
  14.9 ± 1.0
  0.999
  125 ± 8
  [1]
  42-Mo-100
  σγ
  0.199 ± 0.003
  1.0003
  3.76 ± 0.15
  [1]
  42-Mo-95
  σγ
  13.4 ± 0.3
  1.0000
  118 ± 7
  [1]
  42-Mo-96
  σγ
  0.5 ± 0.2
  1.0006
  17 ± 3
  [1]
  42-Mo-97
  σγ
  2.2 ± 0.2
  1.0001
  14.4 ± 3.0
  [1]
  42-Mo-98
  σ
  0.130 ± 0.006
  1.0008
  6.7 ± 0.3
  [1]
  43-Tc-99
  σ
  22.8 ± 1.3
  1.004
  358 ± 20
  [1]
  44-Ru-100
  σ
  5.8 ± 0.4
  1.0003
  11.2 ± 1.1
  [1]
  44-Ru-101
  σ
  5.2 ± 0.3
  1.0011
  102 ± 10
  [1]
  44-Ru-102
  σ
  1.27 ± 0.04
  1.0003
  4.9 ± 0.3
  [1]
  44-Ru-103
  σγ
  1.2
  1.0017
  47
  [5]
  44-Ru-104
  σ
  0.491 ± 0.010
  1.0004
  6.3 ± 0.2
  [1]
  44-Ru-106
  σ
  0.146 ± 0.045
  1.0004
  2.0 ± 0.6
  [1]
  51-Sb-124
  σ
  17.4 ± 2.8
  1.000
  156
  [6]
  53-I-129
  σ
  30.3 ± 1.2
  0.998
  33.8 ± 1.4
  [1]
  54-Xe-130
  σ
  σ0γ(m)
  4.8 ± 1.2
  0.45 ± 0.10
  0.9984
  
  4.8
  
  [7]
  
  54-Xe-131
  σ
  87 ± 10
  1.0015
  890 ± 50
  [1]
  54-Xe-132
  σ
  σ0γ(m)
  0.45 ± 0.06
  0.05 ± 0.01
  1.0004
  
  5.0 ± 0.6
  0.9 ± 0.2
  [1]
  
  54-Xe-133
  σ
  190 ± 90
  1.0004
  90
  [6]
  54-Xe-135
  σ
  2650000 ± 110000
  1.1594
  7600 ± 500
  [1]
  54-Xe-136
  σ
  0.26 ± 0.02
  1.0007
  0.74 ± 0.21
  [8]
  55-Cs-133
  σ
  σ0γ(m)
  30.3 ± 1.1
  2.6 ± 0.1
  1.0029
  
  437 ± 26
  29.0 ± 1.1
  [1]
  
  55-Cs-134
  σ
  140 ± 12
  0.9985
  105
  [9]
  55-Cs-135
  σγ
  8.3 ± 0.3
  0.9977
  37.9 ± 2.7
  [10]
  55-Cs-137
  σ
  0.27 ± 0.03
  1.0005
  0.35
  [11]
  58-Ce-144
  σγ
  1.0 ± 0.1
  1.0005
  2.6 ± 0.3
  [1]
  59-Pr-141
  σ
  σ0γ(m)
  11.5 ± 0.3
  3.9 ± 0.3
  0.9996
  
  17.4 ± 2.0
  
  [1]
  
  59-Pr-143
  σ
  90 ± 10
  0.9998
  190 ± 25
  [1]
  60-Nd-142
  σγ
  18.7 ± 0.7
  0.9990
  6.2
  [12]
  60-Nd-143
  σ
  325 ± 10
  0.9967
  129 ± 30
  [1]
  60-Nd-144
  σγ
  3.6 ± 0.3
  1.0004
  4.2 ± 0.5
  [1]
  60-Nd-145
  σ
  50.0 ± 1.0
  1.0001
  230 ± 35
  [1]
  60-Nd-146
  σ
  1.49 ± 0.06
  1.0004
  2.57 ± 0.14
  [1]
  60-Nd-147
  σγ
  440 ± 150
  0.9957
  539.8
  [13]
  60-Nd-148
  σ
  2.58 ± 0.07
  1.0005
  15.5 ± 1.5
  [1]
  60-Nd-150
  σ
  1.04 ± 0.04
  1.0003
  15.2 ± 0.8
  [1]
  61-Pm-147
  σ
  σ0γ(g)
  σ0γ(m)
  168.4 ± 3.5
  96.0 ± 1.8
  72.4 ± 3.0
  0.9971
  
  
  2064 ± 100
  1274 ± 66
  790 ± 100
  [1]
  
  
  61-Pm-148
  σ
  2000 ± 1000
  1.0005
  2515
  [14]
 
Notation
 
σ0 Neutron cross section at 2200 m/s.
σ Neutron cross section measured in a Maxwellian spectrum.
σr Neutron cross section measured with reactor neutrons.
σc Neutron cross section calculated from resonance parameters or derived from equivalent data of the natural element.
σ(m) Neutron cross section leading to a metastable state of the product.
σ(g) Neutron cross section leading to the ground state of the product.
g Westcott factor: ratio of the Maxwellian averaged cross section σ to 2200 m/s cross section σ0 (g = σ/σ0 ). If the cross section varies as a function of 1/v, g = 1.0.
RI Infinite dilution resonance integral (including the 1/v contribution).
γ Subscript for radiative capture cross section.
f Subscript for fission cross section.
 
References
 

  ANR

S. F. Mughabghab, Atlas of Neutron Resonances, Resonance Parameters and Thermal Cross Sections,
Z = 1 - 100, 5th Edition, Elsevier, Amsterdam, 2006.

  ENDF/B-VII

U.S. Evaluated Nuclear Data Library ENDF/B-VII β1, http://www.nndc.bnl.gov/exfor7/endf00.htm,
2 October 2006;
see also M. B. Chadwick et al., ENDF/B-VII.0 : Next Generation Evaluated Nuclear Data Library for Nuclear Science and Technology, Nucl. Data Sheets 107 (2006) 2931.

  JENDL-3.3

Japanese Evaluated Nuclear Data Library, Incident-neutron data,
http://www-nds.iaea.org/exfor/endf00.htm, 2 October 2006.

  HAR-91
 
H. Harada, et al., Proceedings of the 1990 Symposium on Nuclear Data, , Japan Atomic Energy Research Institute report JAERI-M 91-032 (1991) 199.

  GRY-87

G. Gryntakis et al., Handbook on Nuclear Activation Data, IAEA Technical Reports Series
No. 273 (1987) 199.

  SEK-87

T. Sekine et al., Triple Neutron Capture of 153Eu in a Reactor: the Cross Sections of 154Eu and 155Eu, Appl. Radiat. Isot. 38 (1987) 513.
 
Notes
 
[1] Cross-section data and resonance integral adopted from ANR; Westcott factor calculated from the ENDF/B-VII library.

[2] Cross-section data adopted from ANR; value of the resonance integral adopted from ANR; RI uncertainty adopted from GRY-87; Westcott factor calculated from the ENDF/B-VII library.

[3] Data adopted from ENDF/B-VII; σγ < 4 barns and RI = 17.5 barns are reported in ANR; σγ = 2.24 barns and RI = 18.2 barns are reported in JENDL-3.3.

[4] Data adopted from the ENDF/B-VII library; ENDF/B-VII data were adopted from JENDL-3.3; no data available in ANR.

[5] Data adopted from the ENDF/B-VII library; values in ANR are 1.2 and 5 barns for the thermal cross section and resonance integral, respectively; no uncertainty was reported.

[6] Cross-section data adopted from ANR; resonance integral and Westcott factor calculated from the ENDF/B-VII library; resonance integral not reported in ANR.

[7] Cross-section data and resonance integral adopted from ANR; RI uncertainty not available; Westcott factor calculated from the ENDF/B-VII library.

[8] Cross-section data and resonance integral adopted from ANR; Westcott factor calculated from the ENDF/B-VII library; RI = 0.14 ± 0.01 barns from resolved resonance parameters.

[9] Cross-section data adopted from ANR; resonance integral and Westcott factor calculated from the ENDF/B-VII library; RI = 76 barns is reported in ANR from the resolved resonance parameters.

[10] Cross-section data and resonance integral adopted from ANR; Westcott factor calculated from the ENDF/B-VII library; RI = 50.9 barns in the ENDF/B-VII library.

[11] Cross-section data adopted from ANR; resonance integral and Westcott factor calculated from the ENDF/B-VII library; measured RI = 0.35 ± 0.07 barns reported by HAR-91.

[12] Cross-section data adopted from ANR; resonance integral and Westcott factor calculated from the ENDF/B-VII library; values of 34 ± 11 and 8.8 ± 0.5 barns are also reported in ANR - the first is an experimental value and the second was calculated from the resolved resonance parameters; the ENDF/B-VII evaluation is in good agreement with recent measurements of the capture cross section in the energy range between 3 and 225 keV.

[13] Cross-section data adopted from ANR; resonance integral and Westcott factor calculated from the ENDF/B-VII library; a resonace integral of 430 barns was calculated from the resolved resonance parameters, and is reported in ANR.

[14] Cross-section data adopted from ANR; resonance integral and Westcott factor calculated from the ENDF/B-VII library; resonance integrals are not reported in ANR.

[15] Data adopted from the ENDF/B-VII library; an upper limit of 700 barns is reported for σγ in ANR.

[16] Data adopted from ANR; resonance integral calculated from resolved resonance parameters; a resonance integral of 3700 ± 400 barns is reported by GRY-87.

[17] All data adopted from ANR.

[18] Cross-section data adopted from ANR; Westcott factor and resonance integral calculated from the ENDF/B-VII library; a resonance integral of 3700 ± 2000 barns is reported by GRY-87.

[19] All data adopted from ANR; resonance integral is not available for the Eu-151(n,γ)Eu-152m2 reaction.

[20] Cross-section data and Westcott factor taken from ANR; resonance integral calculated from the ENDF/B-VII library; a value of 2170 barns is reported in JENDL-3.3 for the resonance integral.

[21] Cross-section data taken from ANR; Westcott factor calculated from the ENDF/B-VII library, a value of g = 0.8979 is reported in ANR; resonance integral adopted from the ENDF/B-VII library, while a value of 1500 ± 450 barns is reported by GRY-87.

[22] Cross-section data taken from ANR; resonance integral and Westcott factor calculated from the ENDF/B-VII library; resonance integral in the ENDF/B-VII library is in good agreement with the value of 15300 ± 2700 barns reported by SEK-91; a resonance integral of 23200 ± 300 barns is reported in ANR.

Read our Disclaimer
Copyright International Atomic Energy Agency - Nuclear Data Section P.O. Box 100, Wagramer Strasse 5, A-1400 Vienna, Austria
Telephone (+431) 2600-0; Facsimilie (+431) 2600-7; E-mail: nds.contact-point@iaea.org