8-O - 18 JAEA EVAL-Jun20 N.Iwamoto DIST-DEC21 20200630 ----JENDL-5 MATERIAL 831 -----INCIDENT NEUTRON DATA ------ENDF-6 FORMAT History 2020-06 Evaluated with CCONE code by N.Iwamoto 21-11 revised by O.Iwamoto (MF8/MT4) added 21-11 (MF6/MT5) recoil spectrum added by O.Iwamoto MF= 1 General information MT=451 Descriptive data and directory MF= 2 Resonance parameters MT=151 Resolved and unresolved resonance parameters Resolved resonance region (R-M formula) : below 3.3 MeV The parameters were taken from Donoghue et al./1/, Vaughn et al./2/, Meissner et al./3/, and Mughabghab/4/, whose parameters were revised to match measured total and capture cross sections. The parameters of negative resonance were revised to reproduce the thermal capture cross section of Firestone et al./5/. Thermal cross sections and resonance integrals at 300 K ---------------------------------------------------------- 0.0253 eV res. integ. (*) (barn) (barn) ---------------------------------------------------------- Total 3.5323E+00 Elastic 3.5322E+00 n,gamma 1.4080E-04 6.4509E-05 ---------------------------------------------------------- (*) Integrated from 0.5 eV to 10 MeV. MF= 3 Neutron cross sections MT= 1 Total cross section Calculated with CCONE code /6/. MT= 2 Elastic scattering cross section Calculated with CCONE code /6/. MT= 4,51-91 (n,n') cross section Calculated with CCONE code /6/. MT= 5 Total reaction (except fission) cross section Calculated with CCONE code /6/. MT= 16 (n,2n) cross section Calculated with CCONE code /6/. MT= 17 (n,3n) cross section Calculated with CCONE code /6/. MT= 22 (n,na) cross section Calculated with CCONE code /6/. MT= 24 (n,2na) cross section Calculated with CCONE code /6/. MT= 28 (n,np) cross section Calculated with CCONE code /6/. MT= 33 (n,nt) cross section Calculated with CCONE code /6/. MT=102 Capture cross section Calculated with CCONE code /6/. MT=103,600-649 (n,p) cross section Calculated with CCONE code /6/. MT=104,650-699 (n,d) cross section Calculated with CCONE code /6/. MT=105,700-749 (n,t) cross section Calculated with CCONE code /6/. MT=107,800-849 (n,a) cross section Calculated with CCONE code /6/. MF= 4 Angular distributions of secondary particles MT= 2 Elastic scattering Calculated with CCONE code /6/. MF= 6 Energy-angle distributions of emitted particles MT= 5 Total reaction (except fission) reaction Calculated with CCONE code /6/. MT= 16 (n,2n) reaction Calculated with CCONE code /6/. MT= 17 (n,3n) reaction Calculated with CCONE code /6/. MT= 22 (n,na) reaction Calculated with CCONE code /6/. MT= 24 (n,2na) reaction Calculated with CCONE code /6/. MT= 28 (n,np) reaction Calculated with CCONE code /6/. MT= 33 (n,nt) reaction Calculated with CCONE code /6/. MT=51-91 (n,n') reaction Calculated with CCONE code /6/. MT=102 Capture reaction Calculated with CCONE code /6/. MT=600-649 (n,p) reaction Calculated with CCONE code /6/. MT=650-699 (n,d) reaction Calculated with CCONE code /6/. MT=700-749 (n,t) reaction Calculated with CCONE code /6/. MT=800-849 (n,a) reaction Calculated with CCONE code /6/. MF= 8 Information on decay data MT= 4 (n,n') reaction Decay chain is given in the decay data file. MT= 5 Total reaction (except fission) reaction Decay chain is given in the decay data file. MT= 16 (n,2n) reaction Decay chain is given in the decay data file. MT= 17 (n,3n) reaction Decay chain is given in the decay data file. MT= 22 (n,na) reaction Decay chain is given in the decay data file. MT= 24 (n,2na) reaction Decay chain is given in the decay data file. MT= 28 (n,np) reaction Decay chain is given in the decay data file. MT= 33 (n,nt) reaction Decay chain is given in the decay data file. MT=102 Capture reaction Decay chain is given in the decay data file. MT=103 (n,p) reaction Decay chain is given in the decay data file. MT=104 (n,d) reaction Decay chain is given in the decay data file. MT=105 (n,t) reaction Decay chain is given in the decay data file. MT=107 (n,a) reaction Decay chain is given in the decay data file. ------------------------------------------------------------------ nuclear model calculation with CCONE code /6/ ------------------------------------------------------------------ * Optical model potentials neutron : ripl3-0428/7/ modified proton : ripl3-4017/8/ modified deuteron: ripl3-6201/9/ modified triton : folding OMP, A.J.Koning and J.P.Delaroche/10/ He-3 : folding OMP, A.J.Koning and J.P.Delaroche/10/ alpha : ripl3-9100/11/ modified * Level scheme of O-18 ----------------------- No. Ex(MeV) J PI ----------------------- 0 0.000000 0 + 1 1.982070 2 + 2 3.554840 4 + 3 3.633760 0 + 4 3.920440 2 + 5 4.455540 1 - 6 5.097780 3 - 7 5.254800 2 + 8 5.336400 0 + 9 5.377800 3 + 10 5.530240 2 - 11 6.198220 1 - 12 6.351300 2 - 13 6.404400 3 - 14 6.880450 0 - 15 7.116900 4 + 16 7.615900 1 - 17 7.771070 2 - 18 7.864000 5 - 19 7.977000 3 + 20 8.037800 1 - 21 8.125000 5 - 22 8.213000 2 + 23 8.282000 3 - 24 8.410000 2 - 25 8.521000 0 - 26 8.660000 0 - 27 8.817000 1 + 28 8.955000 0 - 29 9.000000 1 - 30 9.030000 0 - 31 9.100000 0 - 32 9.270000 0 + 33 9.361000 3 - 34 9.414000 3 - 35 9.480000 3 - ----------------------- * Level density parameters (Gilbert-Cameron model/12/) Energy dependent parameters of Mengoni-Nakajima/13/ were used. --------------------------------------------------------- a* Pair Eshell T E0 Ematch Elv_max 1/MeV MeV MeV MeV MeV MeV MeV --------------------------------------------------------- O-19 3.543 2.753 1.432 2.149 -0.488 12.892 6.583 O-18 3.398 5.657 0.873 2.572 0.187 20.539 9.480 O-17 3.642 2.910 -2.141 2.476 0.271 20.123 9.194 O-16 3.104 6.000 -5.253 3.070 4.442 32.792 15.196 N-18 3.398 0.000 1.638 1.889 -1.326 6.949 2.614 N-17 3.252 2.910 1.744 2.575 -2.702 16.487 4.415 N-16 3.104 0.000 -1.701 2.804 -3.018 18.142 6.003 N-15 2.955 3.098 -4.485 3.131 1.279 28.536 12.551 C-15 2.955 3.098 -0.548 2.928 -1.279 20.812 7.414 C-14 2.803 6.414 -2.353 3.073 3.916 26.816 12.963 C-13 2.649 3.328 -4.617 3.242 3.197 27.544 13.760 --------------------------------------------------------- * Gamma-ray strength functions for O-19 E1: enhanced generalized lorentzian model(EGLO)/14/ ER= 24.30 (MeV) EG= 11.52 (MeV) SIG= 18.42 (mb) M1: standard lorentzian model(SLO) ER= 15.37 (MeV) EG= 4.00 (MeV) SIG= 1.98 (mb) E2: standard lorentzian model(SLO) ER= 23.61 (MeV) EG= 5.88 (MeV) SIG= 0.34 (mb) References 1) T.R.Donoghue et al., Nucl. Phys. 54, 33 (1964) 2) F.J.Vaughn et al., Nucl. Phys. 64, 336 (1965) 3) J.Meissner et al., Phys. Rev., C53, 459 (1996) 4) S.F.Mughabghab, Atlas of Neutron Resonances: Resonance Parameters and Thermal Cross Sections (2006) 5) R.B.Firestone et al., Phys. Rev., C93, 044311 (2016) 6) O.Iwamoto, J. Nucl. Sci. Technol., 44, 687 (2007) 7) J.P.Delaroche et al., Nucl.Phys. A390,541(1982) 8) M.B.Chadwick and P.G.Young, Proc.Int. Particle Therapy Mtg. and PTCOG XXIV, 24-26 Apr. 1996,Detroit, Michigan 9) Y.Han et al., Phys.Rev.C74, 044615 (2006) 10) A.J.Koning and J.P.Delaroche, Nucl. Phys. A713, 231 (2003) 11) L.McFadden and G.R.Satchler, Nucl. Phys. 84, 177 (1966) 12) A.Gilbert and A.G.W. Cameron, Can. J. Phys, 43, 1446 (1965) 13) A.Mengoni and Y.Nakajima, J. Nucl. Sci. Technol., 31, 151 (1994) 14) J.Kopecky et al., Phys. Rev. C 47, 312 (1993)