19-K - 40 FUJI E.C. EVAL-MAY87 H.NAKAMURA DIST-MAY10 20090828 ----JENDL-4.0 MATERIAL 1928 -----INCIDENT NEUTRON DATA ------ENDF-6 FORMAT HISTORY 87-05 Newly evaluated by H.Nakamura (fuji electric co. ltd.) 94-02 JENDL-3.2 Total cross section was calculated by T. Watanabe (khi). Inelastic scattering cross sections were calculated by K.Shibata (jaeri). Data were compiled by K.Shibata. ***** modified parts for JENDL-3.2 **************************** (3,1),(3,4),(3,51-91),(3,251),(4,2),(4,51-55) new optical and statistical model cal. (3,2) total - nonelastic **************************************************************** 01-04 JENDL-3.3 Gamma-ray production data were evaluated and compiled by K. Shibata ***** modified parts for JENDL-3.3 **************************** (1,451) Updated (3,251) Deleted. (4,2) Transformation matrix deleted. (5,16-91) INT=22. (12,16-107) Added. (14,16-107) Added. (15,16-107) Added. **************************************************************** 09-08 JENDL-4.0 Total cross sections were recalculated from partial cross sections. mf=1 General information mt=451 Descriptive data and dictionary mf=2 mt=151 Resonance parameters: (not given ) mf=3 Neutron cross sections Below 30 keV Assumed or interpolated cross sections,guided by those of k-39: (10**-5) (2200m/s) (5.10**2) (3.10**4) res.int mt=2 2.75b 2.75 b 2.75 b 2.75 b - mt=102 1509.0 b 30.0 b /1/ 0.2 b 0.023 b 13.45 b mt=103 370.0 b 4.4 b /1/ 0.012 b 0.012 b - mt=107 2.2 b 0.39 b /1/ 0.04 b 0.015 b - mt=1 1884.0 b 37.54 b 3.016 b 2.8 b - 30 keV - 1.0 MeV mt=1,2,4,102 : Calculated with casthy code /2/. mt=103 : 0.012 b, Guided by measurements of H.Weigmann/3/. Above 30 keV. mt=1,2,4,51-91,102 Total, elastic, inelastic and capture calculation with casthy code /2/, considering the competition with the the threshold reaction channels. Optical potential parameters of C.Y.Fu/3/ are used. The spherical optical potential parameters : V = 46.72 Vso= 5.37 (MeV) Ws= 9.13 Wv = 0.0 (MeV) r =rso= 1.26 rs = 1.39 (fm) a =aso= 0.76 b = 0.40 (fm) mt=102 capture data are normalized to 4.2 mb at 200 keV. The discrete level scheme taken from ref. /4/ : no. energy(MeV) spin-parity (g.s.) 0.0 4 - 1 0.0296 3 - 2 0.800 2 - 3 0.892 5 - 4 1.644 0 + 5 1.959 2 + Continuum levels assumed above 2.1 MeV. The level density parameters of Asano et al./5/ are used. ***** JENDL-3.2 ******************************************** The total and inelastic scattering cross sections were cal- culated by using the omp set determined by T. Watanabe. V = 54.36 - 0.325En (MeV) Ws= 2.258 + 0.1698En (MeV) Vso=3.341 (MeV) r =1.20 ,a =0.658 (fm) rs =1.32 ,b =0.602 (fm) rso=1.10 ,aso=0.406 (fm) The cross sections of mt=16,22,28,103,107 in JENDL-3.1 were considered as the competing process for the statistical model calculation. ************************************************************ mt=16(n,2n), 22(n,n'a), 28(n,n'p), 103(n,p), 107(n,a) Based on the statistical model calculations with gnash code /6/, without the precompound reaction correction. transmission coefficients for proton and alpha particle are calculated by using the omp of Becchetti-Grgeenlees /7/ and Huizenga-Igo/8/, respectively. Level density parameters are based on built -in values. mf=4 Angular distributions of secondary neutrons mt=2 Calculated with optical model (casthy). mt=51-55 Calculated with Hauser-Feshbach formula(casthy) mt=16,22,28 Isotropic in the laboratory system. mt=91 Isotropic distributions in cm were converted to the distributions in lab. mf=5 Energy distributions of secondary neutrons mt=16,22,28,91,103,107 Evaporation spectra. mf=12 Photon production multiplicities mt=16,22,28,103,107 Multiplicities were calculated by using the egnash code /10/. mt=102 Multiplicities were calculated by using the casthy code /2/. mt=51-55 Transition probability arrays were given. mf=14 Photon angular distributions mt=16,22,28,51-55,91,102,103,107 Isotropic mf=15 Continuous photon energy spectra mt=16,22,28,103,107 Multiplicities were calculated by using the egnash code /10/. mt=102 Multiplicities were calculated by using the casthy code /2/. References 1) Mughabghab, S.F. et al.: Neutron cross section, Vol.1 (1981). 2) Igarasi, S.: J. Nucl. Sci. Tech., 12, 67 (1975). 3) Weigmann, H.: NESTOR data. 4) Fu, C.Y.: Atom. Data and Nucl. Data Tables., 17, 127 (1976). 5) Lederer, C.M. et al.: Table of isotopes. 7th edit. 6) Asano et al.: private communication. 7) Young, P.G. and Arthur, E.D.: LA-6947 (1977). 8) Becchetti, Jr. and Greenlees, G.W.: Polarization phenomena in nuclear reactions, p.682 (1971). 9) Huizenga, Jr. and Igo, G.J.: Nucl. Phys., 29, 462 (1962). 10) Yamamuro, N.: JAERI-M 90-006 (1990).