51-Sb-121 JAEA EVAL-FEB13 K.Shibata JNST 51, 425 (2014) DIST-DEC21 20180518 ----JENDL-5 MATERIAL 5125 -----INCIDENT NEUTRON DATA ------ENDF-6 FORMAT History 13-03 Re-evaluation was performed by K. Shibata (JAEA)./1/ 18-05 Activation cross sections added by K.Shibata. 21-11 revised by O.Iwamoto (MF8/MT4) added 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 resonance region (MLBW; below 2.0 keV) Evaluation of JENDL-2 was made on the basis of the data measured by Bolotin and Chrien/2/, Wynchank et al./3/, Muradjan et al./4/, Adamchuk et al./5/ and Ohkubo et al. /6/ Neutron orbital angular momentum L and total spin J were based on the data by Bhat et al./7/ and Cauvin et al. /8/ The average radiation width of 0.089 eV was deduced and applied to the levels whose radiation width was unknown. After that, new experimental data for neutron widths and total spin J were published by Ohkubo et al./9/ and Beliaev et al./10/, respectively. Evaluation of JENDL-3 was performed on the basis of the new data for the neutron widths and spin J and JENDL-2 for the radiation widths. Total spin J of some resonances was tentatively estimated with a random number method. Neutron orbital angular momentum L was estimated with a method of Bollinger and Thomas/11/. Scattering radius of 6.0 fm was assumed from the systematics of measured values for neighboring nuclides. For JENDL-4.0+, the resolved resonance parameters were updated by considering the latest measurements of Matsuda et al./12/ The unknown J values were estimated by using the JCONV code /13/. Unresolved resonance region: 2.0 keV - 100 keV The parameters were obtained by fitting to the evaluated total and capture cross sections. The unresolved resonance parameters obtained 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 9.6002E+00 Elastic 3.6063E+00 n,gamma 5.9938E+00 2.1509E+02 ---------------------------------------------------------- (*) Integrated from 0.5 eV to 10 MeV. MF= 3 Neutron cross sections MT= 1 Total cross section The cross section was taken from JENDL-4.0 below 80 keV. Above 80 keV, the cross section was calculated with POD code /14/. MT= 2 Elastic scattering cross section The cross section was obtained by subtracting the non-elastic cross section from the total cross section. MT= 3 Non-elastic cross section Sum of partial non-elastic cross sections. MT= 4,51-91 (n,n') cross section Calculated with POD code /14/. MT= 16 (n,2n) cross section Calculated with POD code /14/. MT= 17 (n,3n) cross section Calculated with POD code /14/. MT= 22 (n,na) cross section Calculated with POD code /14/. MT= 28 (n,np) cross section Calculated with POD code /14/. MT= 32 (n,nd) cross section Calculated with POD code /14/. MT=102 Capture cross section Calculated with POD code /14/. MT=103 (n,p) cross section Calculated with POD code /14/. MT=104 (n,d) cross section Calculated with POD code /14/. MT=105 (n,t) cross section Calculated with POD code /14/. MT=106 (n,He3) cross section Calculated with POD code /14/. MT=107 (n,a) cross section Calculated with POD code /14/. MT=203 (n,xp) cross section Calculated with POD code /14/. MT=204 (n,xd) cross section Calculated with POD code /14/. MT=205 (n,xt) cross section Calculated with POD code /14/. MT=206 (n,xHe3) cross section Calculated with POD code /14/. MT=207 (n,xa) cross section Calculated with POD code /14/. MF= 4 Angular distributions of emitted neutrons MT= 2 Elastic scattering Calculated with POD code /14/. MF= 6 Energy-angle distributions of emitted particles MT= 16 (n,2n) reaction Neutron spectra calculated with POD/14/. MT= 17 (n,3n) reaction Neutron spectra calculated with POD/14/. MT= 22 (n,na) reaction Neutron spectra calculated with POD/14/. MT= 28 (n,np) reaction Neutron spectra calculated with POD/14/. MT= 32 (n,nd) reaction Neutron spectra calculated with POD/14/. MT= 51 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 52 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 53 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 54 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 55 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 56 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 57 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 58 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 59 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 60 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 61 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 62 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 63 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 64 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 65 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 66 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 67 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 68 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 69 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 70 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 71 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 72 (n,n') reaction Neutron angular distributions calculated with POD/14/. MT= 91 (n,n') reaction Neutron spectra calculated with POD/14/. MT= 203 (n,xp) reaction Proton spectra calculated with POD/14/. MT= 204 (n,xd) reaction Deuteron spectra calculated with POD/14/. MT= 205 (n,xt) reaction Triton spectra calculated with POD/14/. MT= 206 (n,xHe3) reaction He3 spectra calculated with POD/14/. MT= 207 (n,xa) reaction Alpha spectra calculated with POD/14/. MF= 8 Information on decay data MT= 16 (n,2n) reaction MT= 17 (n,3n) reaction MT= 22 (n,na) reaction MT= 28 (n,np) reaction MT= 32 (n,nd) reaction MT=102 (n,g) reaction MT=103 (n,p) reaction MT=104 (n,d) reaction MT=105 (n,t) reaction MT=106 (n,He3) reaction MT=107 (n,a) reaction MF= 9 Isomeric branching ratios MT=102 (n,g) reaction Calculated with POD code /14/. The isomeric ratio was modifed below 100 keV by considering experimental data. MF=10 Nuclide production cross sections MT= 16 Partial (n,2n) reactions Calculated with POD code /14/. MT= 22 Partial (n,na) reactions Calculated with POD code /14/. MT= 32 Partial (n,nd) reactions Calculated with POD code /14/. MT=103 Partial (n,p) reactions Calculated with POD code /14/. MT=105 Partial (n,t) reactions Calculated with POD code /14/. MT=106 Partial (n,He3) reactions Calculated with POD code /14/. MT=107 Partial (n,a) reactions Calculated with POD code /14/. MF=12 Gamma-ray multiplicities MT= 3 Non-elastic gamma emission Calculated with POD code /14/. MF=14 Gamma-ray angular distributions MT= 3 Non-elastic gamma emission Assumed to be isotropic. MF=15 Gamma-ray spectra MT= 3 Non-elastic gamma emission Calculated with POD code /14/. *************************************************************** * Nuclear Model Calculations with POD Code /14/ * *************************************************************** 1. Theoretical models The POD code is based on the spherical optical model, the distorted-wave Born approximaiton (DWBA), one-component exciton preequilibrium model, and the Hauser-Feshbach-Moldauer statis- tical model. With the preequilibrim model, semi-empirical pickup and knockout process can be taken into account for composite-particle emission. The gamma-ray emission from the compound nucleus can be calculated within the framework of the exciton model. The code is capable of reading in particle transmission coefficients calculated by separate spherical or coupled-channel optical model code. 2. Optical model parameters Neutrons: Coupled-channel optical model parameters /15/ Protons: Koning and Delaroche /16/ Deuterons: Lohr and Haeberli /17/ Tritons: Becchetti and Greenlees /18/ He-3: Becchetti and Greenlees /18/ Alphas: Lemos /19/ potentials modified by Arthur and Young /20/ 3. Level scheme of Sb-121 ------------------------- No. Ex(MeV) J PI ------------------------- 0 0.00000 5/2 + 1 0.03713 7/2 + 2 0.50760 3/2 + 3 0.57314 1/2 + 4 0.94699 9/2 + 5* 1.02400 7/2 + 6 1.03543 9/2 + 7 1.13929 11/2 + 8 1.14465 9/2 + 9 1.32189 11/2 + 10 1.38550 7/2 + 11 1.40729 3/2 - 12 1.42686 11/2 - 13 1.44751 3/2 + 14 1.47120 7/2 + 15 1.47440 1/2 + 16 1.50900 7/2 + 17 1.51920 7/2 + 18 1.57540 9/2 - 19 1.61260 7/2 + 20 1.62760 9/2 + 21 1.64880 13/2 + 22 1.65900 1/2 - ------------------------- Levels above 1.66900 MeV are assumed to be continuous. The symbol (*) stands for the excited level involved in the coupled-channel calculation. A giant resonance, which was estimated from DWBA, was added to the continuum at Ex = 2.3 MeV. 4. Level density parameters Energy-dependent parameters of Mengoni-Nakajima /21/ were used ---------------------------------------------------------- Nuclei a* Pair Esh T E0 Ematch Elv_max 1/MeV MeV MeV MeV MeV MeV MeV ---------------------------------------------------------- Sb-122 14.721 0.000 1.681 0.610 -1.394 4.451 0.605 Sb-121 14.463 1.091 1.847 0.621 -0.375 5.680 1.659 Sb-120 14.908 0.000 2.186 0.533 -0.900 3.433 0.842 Sb-119 14.259 1.100 2.043 0.621 -0.368 5.683 1.660 Sn-121 14.630 1.091 0.971 0.629 -0.241 5.555 1.403 Sn-120 14.981 2.191 0.887 0.640 0.657 6.955 2.800 Sn-119 14.223 1.100 1.470 0.652 -0.479 5.977 1.572 In-119 14.259 1.100 2.153 0.543 0.296 4.453 1.921 In-118 14.699 0.000 2.548 0.535 -0.957 3.507 0.200 In-117 14.055 1.109 2.519 0.563 0.097 4.820 1.713 ---------------------------------------------------------- 5. Gamma-ray strength functions M1, E2: Standard Lorentzian (SLO) E1 : Modified Lorentzian (MLO) /22/ 6. Preequilibrium process Preequilibrium is on for n, p, d, t, He-3, and alpha. Preequilibrium capture is on. References 1) K.Shibata, J. Nucl. Sci. Technol. 51, 425 (2014). 2) H.Bolotin, R.E.Chrien, Nucl. Phys., 42, 676 (1963). 3) S.Wynchank et al., Phys. Rev., 166, 1234 (1968). 4) G.V.Muradjan et al.: Jaderno-Fizicheskie Issledovanija, 6, 64 (1968). 5) Ju.V.Adamchuk et al., IAE-2108 (1971). 6) M.Ohkubo et al., J. Phys. Soc. Japan, 33, 1185 (1972). 7) M.R.Bhat et al., Phys. Rev., C2, 1115 (1970). 8) B.Cauvin et al., "Proc. 3rd Conf. on Neutron Cross Sections and Technol., Knoxville 1971", Vol. 2, 785 (1971). 9) M.Ohkubo et al., JAERI-M 93-012 (1993). 10) F.N.Beliaev et al.: Proc. of 6th All Union Conf. on Neutron Physics, Kiev, October 1983, Vol. 2, 366 (1983) 11) L.M.Bollinger, G.E.Thomas, Phys. Rev., 171,1293(1968). 12) Y.Matsuda et al., Phys. Rev., C64, 015501 (2001). 13) T.Nakagawa, Y.Kikuchi, T.Fukahori, "Auxiliary Programs for Resonance Parameter Storage and Retrieval System REPSTOR," JAERI-Data/Code 99-030 (1999) [in Japanese]. 14) A.Ichihara et al., JAEA-Data/Code 2007-012 (2007). 15) S.Kunieda et al., J. Nucl. Sci. Technol. 44, 838 (2007). 16) A.J.Koning, J.P.Delaroche, Nucl. Phys. A713, 231 (2003). 17) J.M.Lohr, W.Haeberli, Nucl. Phys. A232, 381 (1974). 18) F.D.Becchetti,Jr., G.W.Greenlees, "Polarization Phenomena in Nuclear Reactions," p.682, The University of Wisconsin Press (1971). 19) O.F.Lemos, Orsay Report, Series A, No.136 (1972). 20) E.D.Arthur, P.G.Young, LA-8626-MS (1980). 21) A.Mengoni, Y.Nakajima, J. Nucl. Sci. Technol. 31, 151 (1994). 22) V.A.Plujko et al., J. Nucl. Sci. Technol. Suppl. 2, 811 (2002).