5-B - 11 JAERI EVAL-MAY88 T.FUKAHORI JAERI-M 89-046 DIST-DEC21 20090831 ----JENDL-5 MATERIAL 528 -----INCIDENT NEUTRON DATA ------ENDF-6 FORMAT HISTORY 87-03 Newly evaluated by T.Fukahori (jaeri) 88-05 Revised by T.Fukahori (jaeri) (n,d),(n,nd),(n,t),(n,nt) and (n,n2a) added 01-07 Total cross section was revised above 14 MeV. Compiled by K.Shibata for JENDL-3.3. ***** modified parts for JENDL-3.3 ********************** (1,451) Updated. (3,1) Revised above 14 MeV. (3,2) Re-calculated. (3,251) Deleted. (4,2) Transformation matrix deleted. (5,16-91) INT=22 (33,1-102) Taken from JENDL-3.2 covariance file. *********************************************************** 09-08 Photon multiplicities were revised for MF/MT=12/102. 21-11 revised by O.Iwamoto (MF8/MT16,22,28,29,32,33,102-105,107) JENDL/AD-2017 adopted (MF8/MT4) added mf=1 General information mt=451 Descriptive data and dictionary mf=2 Resonance parameters mt=151 Only scattering radius is given. mf=3 Cross sections 2200 m/sec cross sections and resonance integrals 2200 m/sec res. integ. total 5.050 b - elastic 5.045 b - capture 5.075 mb 2.542 mb mt=1 Total cross section Below 1 MeV, calculated with the multi-level Breit-Wigner formula and the resonance parameters taken from ref. /1/. In the range of 1 to 4 MeV, based on the R-matrix calculation which was performed by using Koehler et al.'s parameters /2/. Above 4 MeV, smooth curve was obtained by fitting to the experimental data of Auchampaugh et al./3/. ****** JENDL-3.3 **************************************** Above 14 MeV, the optical model calculations were performe using the parameter set of Glendinning et al./12/ The calculated values were normalized to the JENDL-3.2 value at 14 MeV. ********************************************************** mt=2 Elastic scattering cross section Below 1 MeV based on the multi-level Breit-Wigner formula. In the range of 1 to 2.2 MeV, the R-matrix calculation was adopted. Above 2.2 MeV, the cross section was obtained by subtracting the reaction cross sections from the total cross section. mt=4 Total inelastic scattering cross section sum of mt=51-57 and 91. mt=16 (n,2n)B-10 cross section Calculated with gnash /4/. The optical potential parameters, the level density parameters and the level scheme are shown in Tables 1-3, respectively. mt=22 (n,n'alpha)Li-7 cross section Calculated with gnash. The optical potential parameters, the level density parameters and the level scheme are shown in Tables 1-3, respectively. mt=28 (n,n'p)Be-10 cross section Based on the gnash calculation. The parameters used are listed in Tables 1-3. mt=29 (n,n'2alpha)t cross section Based on (n,n't) cross section of the gnash calculation and normalized to he production cross section of Kneff et al. /5/. mt=32 (n,n'd)Be-9 cross section Based on the gnash calculation. The parameters used are listed in Tables 1-3. mt=33 (n,n't)Be-8 cross section Based on the gnash calculation. The parameters used are listed in Tables 1-3. mt=51 Inelastic scattering The R-matrix calculation with Koehler et al.'s parameters was adopted below 7 MeV. Above 7 mev, the gnash and DWBA calculations were performed. The sum of both results was adopted, and normalized to the experimental data of Koehler et al. /2/ and Glendinning et al. /6/. mt=52,53 Inelastic scattering Below 7 MeV, based on the R-matrix calculation with the searched parameters. Above 7 MeV, the sum of the gnash and DWBA calculations was adopted, and fitted to the experimental data of Glendinning et al.. mt=54-57 Inelastic scattering The sum of results of the gnash and DWBA calculations was normalized to be the result of Oktavian's ddx data /7/. mt=91 Continuum inelastic scattering Above 7.2 MeV, continuum levels were adopted. Based on the gnash calculation. mt=102 Capture cross section Calculated from the multi-level Breit-Wigner formula. The direct capture /1/ is also considered. mt=103 (n,p)Be-11 cross section Based on the gnash calculation with being normalized to the experimental data of Stepancic et al. /8/. The parameters used are shown in Tables 1-3, respectively. mt=104 (n,d)Be-10 cross section Based on the gnash calculation. mt=105 (n,t)Be-9 cross section Based on the gnash calculation. mt=107 (n,alpha)Li-8 cross section The gnash calculation was performed, and normalized to the experimental data of Antolkovic et al. /9/ and Scobel et al. /10/. The parameters used are shown in Tables 1-3, respectively. mf=4 Angular distributions of secondary neutrons mt=2 The R-matrix and DWBA calculations were adopted below 8 MeV and above 8 MeV, respectively. mt=16,22,28,29,32,33,91 Assumed to be isotropic in the center of mass system. mt=51,52,53 Below 8 MeV based on R-matrix calculation. Above 8 MeV, based on the DWBA and the gnash calculations. mt=54,55,56,57 Based on the DWBA and the gnash calculations. mf=5 Energy distributions of secondary neutrons mt=16,22,28,29,32,33,91 Based on the gnash calculation. mf=12-15 Gamma-ray data Based on the gnash calculation. mf=33 Covariances of cross sections (ref. 19) mt=1 Based on experimental data. A chi-value was 6.212. mt=2 Constructed from mt=1 and 102. mt=102 Based on experimental data. A chi-value was 1.406. Table 1 The optical potential parameters ------------------------------------------------------------------ neutron V = 41.8-0.005E MeV* r0= 1.40 fm a0= 0.35 fm ref.12 Ws= 1.01E MeV* ri= 1.15 fm* ai= 0.50 fm proton V = 66.1-0.273E MeV r0= 1.15 fm a0= 0.57 fm ref.13 Ws= 1.50+0.581E MeV ri= 1.15 fm ai= 0.5 fm Vsym = 5.5 MeV r0= 1.15 fm a0= 0.57 fm deuteron V = 80.0 MeV* r0= 1.0 fm* a0= 1.0 fm* ref.14 Wv= 30.0 MeV ri= 1.0 fm* ai= 0.8 fm* Vsym = 6.0 MeV* r0= 1.0 fm* a0= 1.0 fm* triton V = 103.0+20.0E MeV* r0= 0.85 fm a0= 0.70 fm ref.15 Wv= 1.49E MeV* ri= 2.06 fm ai= 0.72 fm Vsym = 8.55 MeV* r0= 0.85 fm a0= 0.70 fm alpha V = 285.2-2.40E MeV* r0= 1.61 fm* a0= 0.55 fm* ref.16 Ws= 16.16-0.70E MeV* ri= 1.81 fm ai= 0.65 fm ------------------------------------------------------------------ note : E is incident neutron energy in lab. system. * means that parameter is modified from original one. Table 2 The level density parameters --------------------------------------------------------- a(1/MeV) t(MeV) pair.(MeV) --------------------------------------------------------- B-10 1.196 7.990 0.0 B-11 1.431 6.112 2.67 B-12 1.491 6.201 0.0 Be-8 1.115 9.187 5.13 Be-9 1.125 8.248 2.46 Be-10 1.088 10.029 5.13 Be-11 1.419 7.277 2.46 Li-7 1.138 7.197 2.67 Li-8 1.115 8.170 0.0 --------------------------------------------------------- Table 3 The level scheme (energy(MeV), spin and parity) /17-18/ ------------------------------------------------------------------ B-10 B-11 Be-10 Be-11 Li-7 Li-8 ------------------------------------------------------------------ gs 0.0 3+ 0.0 3/2- 0.0 0+ 0.0 1/2+ 0.0 3/2- 0.0 2+ 1 0.718 1+ 2.125 1/2- 3.368 2+ 0.320 1/2- 0.478 1/2- 0.981 1+ 2 1.740 0+ 4.445 5/2- 5.958 2+ 4.630 7/2- 3 2.154 1+ 5.020 3/2- 5.960 1- 6.680 5/2- 4 3.587 2+ 6.743 7/2- 6.179 0+ 7.460 5/2- 5 4.774 3+ 6.792 1/2+ 6.263 2- 9.670 7/2- 6 5.110 2- 9.120 7/2+ 7.371 3- 9.850 3/2- 7 5.164 2+ 10.60 7/2+ 7.452 2+ 11.240 3/2- 8 5.180 1+ 9.270 4- 9 5.926 2+ 9.400 2+ 10 6.025 4+ 11 6.127 3- 12 6.561 4- 13 6.873 1- 14 7.002 2+ 15 7.430 2- 16 7.467 1+ 17 7.479 2+ 18 7.561 0+ 19 7.670 1+ 20 7.819 1- 21 8.070 2+ 22 8.700 2+ 23 8.889 3- 24 8.895 2+ ------------------------------------------------------------------ References 1) Mughabghab S.F. et al. : 'Neutron Cross Sections' Vol.1 Part A (academic press 1981, new york) 2) Koehler P.E. et al.: Nucl. 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A433 (1985) 1 19) Shibata K. et al.: JAERI-Research 98-045 (1998).