41-Nb- 93 EVAL-Sep18 A.Ichihara DIST-DEC21 20200318 ----JENDL-5 MATERIAL 4125 -----INCIDENT NEUTRON DATA ------ENDF-6 FORMAT History 16-04 Evaluated with CCONE code /1/ by A.Ichihara./2/ 20-10 Energies of discrete primary photons were corrected. 21-10 Resolved resonance parameters were replaced by N.Iwamoto. 21-11 above 20 MeV, JENDL/ImPACT-2018 merged by O.Iwamoto 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 resonances: 1.0e-5 eV - 7 keV Parameters in JENDL-3.1 were taken from JENDL-2 by modifying J values. The JENDL-2 parameters were evaluated on the basis of following measurements: transmission by Garg et al./3/, Poittevin et al./4/ and Iliescu et al./5/ scattering by Iliescu et al./5/ capture by Macklin /6,7/, Lopez et al./8/ and Iliescu et al. /5/ The original area data of Macklin /6/ were multiplied by 1.0737 according to the corrigendum /7/. J values determined by Haste et al. /9/ were adopted. Average radiative width was assumed to be 0.172 eV (0.212 eV for doublet), and Scattering radius to be 7.10 fm. The J values of resonances without known J values were randomly assigned. For JENDL-3.2, re-assignment of J and modification of neutron and radiative widths were made to reproduce the measured capture area data/6,7/. In JENDL-4.0, we took account of the data for eight resonances obtained by Drindak et al./10/ The J values for 364.93-eV s-wave, 362.71-eV p-wave and 392.53-eV p-wave resonances were taken from ENDF/B-VI.8. After JENDL-3.3 evaluation, new measurements 93Nb resonance parameters have been made by Drindak et al./10/ and by Wang et al./11/ Resonance parameters of JENDL-3.3 are replaced by those of Drindak et al./10/ in the resonance energy region below 500eV, in detail, an s-wave resonance at Er=194.25 eV; J=4 was added and a p-wave resonance at Er=184.3 eV was eliminated. Resonance parameters of a negative resonance were determined to reproduce thermal cross sections and resonance integral given by Mughabghab/12/. In JENDL-5, the resonance energy 3143 eV was changed to 3140 eV according to /6/. The parameters of 105, 119, 194, 335, 378-eV s-wave and of 36, 42, 94, 243, 318, 392-eV p-wave resonances were replaced into the results of J-PARC MLF ANNRI/13/. The presence of 55-eV p-wave resonance was confirmed from the capture measurement. The parameters of the negative resonances were adjusted so as to reproduce the data of Krane /14/. Unresolved resonances: 7 keV - 600 keV The unresolved resonance paramters (URP) were determined by the ASREP code /15/ so as to reproduce the evaluated total and capture cross sections calculated with the optical model code CCONE /1/. The unresolved parameters should be used only for self-shielding calculation. Thermal cross sections and resonance integrals at 300 K ---------------------------------------------------------- 0.0253 eV res. integ. (*) (barns) (barns) ---------------------------------------------------------- Total 7.63766E+00 Elastic 6.57799E+00 n,gamma 1.05967E+00 9.14297E+00 n,alpha 6.69279E-07 1.76380E-05 ---------------------------------------------------------- (*) Integrated from 0.5 eV to 10 MeV. MF= 3 Neutron cross sections MT= 1 Total cross section Calculated with CCONE code /1/. MT= 2 Elastic scattering cross section Calculated with CCONE code /1/. MT=4,51-91 (n,n') cross section Calculated with CCONE code /1/. In MT=56, the DWBA cross section (l=2,beta=0.111) was added/16/. In MT=91, following DWBA cross section were added/16/. (GE=1.54 MeV,l=2,beta=0.077,GG=0.6 MeV) (GE=2.15 MeV,l=3,beta=0.15, GG=0.6 MeV) (GE=2.50 MeV,l=3,beta=0.12, GG=0.6 MeV) MT= 16 (n,2n) cross section Calculated with CCONE code /1/. MT= 17 (n,3n) cross section Calculated with CCONE code /1/. MT= 22 (n,na) cross section Calculated with CCONE code /1/. MT= 28 (n,np) cross section Calculated with CCONE code /1/. MT= 32 (n,nd) cross section Calculated with CCONE code /1/. MT= 33 (n,nt) cross section Calculated with CCONE code /1/. MT= 41 (n,2np) cross section Calculated with CCONE code /1/. MT=102 Capture cross section Calculated with CCONE code /1/. MT=103,600-649 (n,p) cross section Calculated with CCONE code /1/. MT=104,650-699 (n,d) cross section Calculated with CCONE code /1/. MT=105,700-749 (n,t) cross section Calculated with CCONE code /1/. MT=106,750-799 (n,He3) cross section Calculated with CCONE code /1/. MT=107,800-849 (n,a) cross section Calculated with CCONE code /1/. MF= 4 Angular distributions of secondary neutrons MT= 2 Elastic scattering Calculated with CCONE code /1/. MF= 6 Energy-angle distributions of emitted particles MT= 16 (n,2n) reaction Calculated with CCONE code /1/. MT= 17 (n,3n) reaction Calculated with CCONE code /1/. MT= 22 (n,na) reaction Calculated with CCONE code /1/. MT= 28 (n,np) reaction Calculated with CCONE code /1/. MT= 32 (n,nd) reaction Calculated with CCONE code /1/. MT= 33 (n,nt) reaction Calculated with CCONE code /1/. MT= 41 (n,2np) reaction Calculated with CCONE code /1/. MT=51-91 (n,n') reaction Calculated with CCONE code /1/. MT=102 Capture reaction Calculated with CCONE code /1/. MT=600-649 (n,p) reaction Calculated with CCONE code /1/. MT=650-699 (n,d) reaction Calculated with CCONE code /1/. MT=700-749 (n,t) reaction Calculated with CCONE code /1/. MT=750-799 (n,He3) reaction Calculated with CCONE code /1/. MT=800-849 (n,a) reaction Calculated with CCONE code /1/. MF= 8 Information on decay data MT=4 (n,n') MT= 16 (n,2n) MT= 17 (n,3n) MT= 22 (n,na) MT= 28 (n,np) MT= 32 (n,nd) MT= 33 (n,nt) MT= 41 (n,2np) MT=102 Capture MT=103 (n,p) MT=104 (n,d) MT=105 (n,t) MT=106 (n,He3) MT=107 (n,a) MF= 9 Isomeric branching ratios MT=102 Capture reaction Calculated with CCONE code /1/ in energies above 7 keV. The branching ratio by Arbocco et al. /17/ was adopted at 0.0253 eV. MT=107 (n,a) reaction Calculated with CCONE code /1/. MF=10 Nuclide production cross sections MT=4 (n,n') reaction Calculated with CCONE code /1/. MT= 16 (n,2n) reaction Calculated with CCONE code /1/. MT= 17 (n,3n) reaction Calculated with CCONE code /1/. MT= 22 (n,na) reaction Calculated with CCONE code /1/. MT=106 (n,He3) reaction Calculated with CCONE code /1/. ------------------------------------------------------------------ nuclear model calculation with CCONE code /1/ ------------------------------------------------------------------ * Optical model potentials alpha : O.F.Lemos/18/ (with R_V = R_I = 1.25 fm) deuteron: J.M.Lohr and W.Haeberli/19/ He-3 : F.D.Becchetti Jr. and G.W.Greenlees/20/ neutron : A.J.Koning and J.P.Delaroche/21/ (v_1 = 53.7 MeV) proton : A.J.Koning and J.P.Delaroche/21/ triton : F.D.Becchetti Jr. and G.W.Greenlees/20/ * Level scheme of Nb-93 ----------------------- No. Ex(MeV) J PI ----------------------- 0 0.000000 9/2 + 1 0.030820 1/2 - 2 0.687000 3/2 - 3 0.743910 7/2 + 4 0.808580 5/2 + 5 0.810410 5/2 - 6 0.949830 13/2 + 7 0.970000 3/2 - 8 0.978940 11/2 + 9 1.082670 9/2 + ----------------------- * Level density parameters (Gilbert-Cameron model/22/) Energy dependent parameters of Mengoni-Nakajima/23/ were used. --------------------------------------------------------- a* Pair Eshell T E0 Ematch Elv_max 1/MeV MeV MeV MeV MeV MeV MeV --------------------------------------------------------- Nb-94 11.000 0.000 0.581 0.877 -2.105 5.808 1.060 Nb-93 11.549 1.244 0.104 0.980 -2.040 9.235 1.083 Nb-92 11.929 0.000 -1.409 0.917 -2.123 6.664 1.972 Nb-91 11.338 1.258 -1.938 0.984 -0.766 8.522 2.065 Zr-93 11.200 1.244 0.476 0.856 -0.689 6.827 1.169 Zr-92 11.704 2.502 -0.006 0.852 0.518 8.253 1.847 Zr-91 11.890 1.258 -1.233 0.823 0.028 6.226 2.395 Zr-90 11.748 2.530 -1.956 0.846 1.531 7.511 2.739 Y-91 11.338 1.258 0.165 0.772 0.116 5.540 1.187 Y-90 12.200 0.000 -1.297 0.703 -0.335 3.275 0.954 Y-89 9.200 1.272 -1.867 0.899 1.059 4.993 2.222 Y-88 11.495 0.000 -0.510 0.819 -1.351 4.887 0.712 --------------------------------------------------------- * Gamma-ray strength functions for Nb-94 E1: generalized lorentzian model(GLO)/24/ ER= 16.52 (MeV) EG= 5.51 (MeV) SIG= 192.24 (mb) M1: standard lorentzian model(SLO) ER= 9.02 (MeV) EG= 4.00 (MeV) SIG= 0.75 (mb) E2: standard lorentzian model(SLO) ER= 13.86 (MeV) EG= 4.98 (MeV) SIG= 2.14 (mb) References 1) O.Iwamoto, J. 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Chem. 296, 931 (2013). 18) O.F.Lemos, "Diffusion elastique de particules alpha de 21 a 29.6 mev sur des noyaux de la region ti-zn", Orsay Report, Series A., No. 136, (1972). 19) J.M.Lohr and W.Haeberli, Nucl. Phys. A232,381 (1974). 20) F.D.Becchetti Jr. and G.W.Greenlees, Ann. Rept. J.H.Williams Lab., Univ. Minnesota (1969). 21) A.J.Koning and J.P.Delaroche, Nucl. Phys. A713, 231 (2003). 22) A.Gilbert and A.G.W.Cameron, Can. J. Phys, 43, 1446 (1965). 23) A.Mengoni and Y.Nakajima, J. Nucl. Sci. Technol., 31, 151 (1994). 24) Kopecky, J. and Uhl, M.: Phys. Rev., C41, 1941 (1990).