51-Sb-123 JAEA EVAL-MAR13 K.Shibata JNST 51, 425 (2014) DIST-DEC21 20180518 ----JENDL-5 MATERIAL 5131 -----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 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 2.5 keV) Evaluation for JENDL-2 was made on the basis of the data measured by Stolvy and Harvey/2/, Bolotin and Chrien/3/, Wynchank et al./4/, Muradjan et al./5/, Adamchuk et al./6/, Ohkubo et al./7/ and Ohkubo/8/. Angular momentum L and spin J were based on the data by Bhat et al./9/ and Cauvin et al./10/. The average radiation width of 0.098 eV was deduced and applied to the levels whose radiation width was unknown. Negative resonance was added so as to reproduce the thermal capture cross section given by Mughabghab et al./11/ After the evaluation for JENDL-2, new experimental data of neutron widths were published by Ohkubo et al./12/ evaluation of JENDL-3 was made on the basis of the new experimental data for the neutron widths and previous ones for the radiation withds and total spin J. 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/13/. Scattering radius of 6.0 fm was assumed from the systematics of measured values for neighboring nuclides. Parameters of a negative resonance were also modified so as to reproduce the thermal capture cross section/11/. For JENDL-4.0+, the resolved resonance parameters were updated by considering the latest measurements of Matsuda et al./14/ The unknown J values were estimated by using the JCONV code /15/. Unresolved resonance region: 2.5 keV - 300 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 8.1030E+00 Elastic 3.9154E+00 n,gamma 4.1876E+00 1.2288E+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 45 keV. Above 45 keV, the cross section was calculated with POD code /16/. 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 /16/. MT= 16 (n,2n) cross section Calculated with POD code /16/. MT= 17 (n,3n) cross section Calculated with POD code /16/. MT= 22 (n,na) cross section Calculated with POD code /16/. MT= 28 (n,np) cross section Calculated with POD code /16/. MT= 32 (n,nd) cross section Calculated with POD code /16/. MT=102 Capture cross section Calculated with POD code /16/. MT=103 (n,p) cross section Calculated with POD code /16/. MT=104 (n,d) cross section Calculated with POD code /16/. MT=105 (n,t) cross section Calculated with POD code /16/. MT=106 (n,He3) cross section Calculated with POD code /16/. MT=107 (n,a) cross section Calculated with POD code /16/. MT=203 (n,xp) cross section Calculated with POD code /16/. MT=204 (n,xd) cross section Calculated with POD code /16/. MT=205 (n,xt) cross section Calculated with POD code /16/. MT=206 (n,xHe3) cross section Calculated with POD code /16/. MT=207 (n,xa) cross section Calculated with POD code /16/. MF= 4 Angular distributions of emitted neutrons MT= 2 Elastic scattering Calculated with POD code /16/. MF= 6 Energy-angle distributions of emitted particles MT= 16 (n,2n) reaction Neutron spectra calculated with POD/16/. MT= 17 (n,3n) reaction Neutron spectra calculated with POD/16/. MT= 22 (n,na) reaction Neutron spectra calculated with POD/16/. MT= 28 (n,np) reaction Neutron spectra calculated with POD/16/. MT= 32 (n,nd) reaction Neutron spectra calculated with POD/16/. MT= 51 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 52 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 53 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 54 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 55 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 56 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 57 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 58 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 59 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 60 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 61 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 62 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 63 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 64 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 65 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 66 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 67 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 68 (n,n') reaction Neutron angular distributions calculated with POD/16/. MT= 91 (n,n') reaction Neutron spectra calculated with POD/16/. MT= 203 (n,xp) reaction Proton spectra calculated with POD/16/. MT= 204 (n,xd) reaction Deuteron spectra calculated with POD/16/. MT= 205 (n,xt) reaction Triton spectra calculated with POD/16/. MT= 206 (n,xHe3) reaction He3 spectra calculated with POD/16/. MT= 207 (n,xa) reaction Alpha spectra calculated with POD/16/. 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 /1/. The isomeric ratio was modifed in the entire energy region. The ratio for M1 was multiplied by 0.0309 and that for M2 was multiplied by 0.1533. As a result, the ratio for G was also modified. MF=10 Nuclide production cross sections MT= 16 Partial (n,2n) reactions Calculated with POD code /16/. MT= 22 Partial (n,na) reactions Calculated with POD code /16/. MT= 32 Partial (n,nd) reactions Calculated with POD code /16/. MT=103 Partial (n,p) reactions Calculated with POD code /16/. MT=105 Partial (n,t) reactions Calculated with POD code /16/. MT=106 Partial (n,He3) reactions Calculated with POD code /16/. MT=107 Partial (n,a) reactions Calculated with POD code /16/. MF=12 Gamma-ray multiplicities MT= 3 Non-elastic gamma emission Calculated with POD code /16/. 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 /16/. *************************************************************** * Nuclear Model Calculations with POD Code /16/ * *************************************************************** 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 /17/ Protons: Koning and Delaroche /18/ Deuterons: Lohr and Haeberli /19/ Tritons: Becchetti and Greenlees /20/ He-3: Becchetti and Greenlees /20/ Alphas: Lemos /21/ potentials modified by Arthur and Young /22/ 3. Level scheme of Sb-123 ------------------------- No. Ex(MeV) J PI ------------------------- 0 0.00000 7/2 + 1 0.16033 5/2 + 2 0.54180 3/2 + 3 0.71280 1/2 + 4* 1.03024 9/2 + 5 1.08864 9/2 + 6 1.18128 7/2 + 7 1.26090 5/2 + 8 1.33742 9/2 + 9 1.42480 1/2 - 10 1.51050 3/2 + 11 1.51353 7/2 + 12 1.57550 7/2 - 13 1.64300 5/2 + 14 1.64400 11/2 - 15 1.72900 3/2 - 16 1.74500 5/2 + 17 1.76430 7/2 + 18 1.77340 5/2 - ------------------------- Levels above 1.78340 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 /23/ were used ---------------------------------------------------------- Nuclei a* Pair Esh T E0 Ematch Elv_max 1/MeV MeV MeV MeV MeV MeV MeV ---------------------------------------------------------- Sb-124 14.872 0.000 0.763 0.688 -1.937 5.528 0.643 Sb-123 14.667 1.082 1.092 0.594 0.036 5.016 1.773 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 Sn-123 15.969 1.082 -0.017 0.714 -1.324 7.311 1.301 Sn-122 15.193 2.173 0.164 0.629 0.927 6.532 3.036 Sn-121 14.630 1.091 0.971 0.629 -0.241 5.555 1.403 In-121 14.463 1.091 1.390 0.614 -0.170 5.389 1.504 In-120 14.908 0.000 1.930 0.635 -1.806 5.074 0.070 In-119 14.259 1.100 2.153 0.543 0.296 4.453 1.921 ---------------------------------------------------------- 5. Gamma-ray strength functions M1, E2: Standard Lorentzian (SLO) E1 : Modified Lorentzian (MLO) /24/ 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) A.Stolvy, J.A.Harvey, Phys. Rev., 108, 353 (1957). 3) H.Bolotin, R.E.Chrien, Nucl. Phys., 42, 676 (1963). 4) S.Wynchank et al., Phys. Rev., 166, 1234 (1968). 5) G.V.Muradjan et al., Jaderno-Fizicheskie Issledovanija, 6, 64 (1968). 6) Ju.V.Adamchuk et al., IAE-2108 (1971). 7) M.Ohkubo et al., J. Phys. Soc. Japan, 33, 1185 (1972). 8) M.Ohkubo, private communication (1982). 9) M.R.Bhat et al., Phys. Rev., C2, 1115 (1970). 10) B.Cauvin et al., "Proc 3rd Conf. on Neutron Cross Sections and Technol., Koxville 1971", Vol. 2, 785 (1971). 11) S.F.Mughabghab et al., "Neutron Cross Sections, Vol. I, Part A," Academic Press (1981). 12) M.Ohkubo et al., JAERI-M 93-012 (1993). 13) L.M.Bollinger, G.E.Thomas, Phys. Rev., 171, 1293 (1968). 14) Y.Matsuda et al., Phys. Rev., C64, 015501 (2001). 15) T.Nakagawa, Y.Kikuchi, T.Fukahori, "Auxiliary Programs for Resonance Parameter Storage and Retrieval System REPSTOR," JAERI-Data/Code 99-030 (1999) [in Japanese]. 16) A.Ichihara et al., JAEA-Data/Code 2007-012 (2007). 17) S.Kunieda et al., J. Nucl. Sci. Technol. 44, 838 (2007). 18) A.J.Koning, J.P.Delaroche, Nucl. Phys. A713, 231 (2003). 19) J.M.Lohr, W.Haeberli, Nucl. Phys. A232, 381 (1974). 20) F.D.Becchetti,Jr., G.W.Greenlees, "Polarization Phenomena in Nuclear Reactions," p.682, The University of Wisconsin Press (1971). 21) O.F.Lemos, Orsay Report, Series A, No.136 (1972). 22) E.D.Arthur, P.G.Young, LA-8626-MS (1980). 23) A.Mengoni, Y.Nakajima, J. Nucl. Sci. Technol. 31, 151 (1994). 24) V.A.Plujko et al., J. Nucl. Sci. Technol. Suppl. 2, 811 (2002).