19-K - 40
19-K - 40 FUJI E.C. EVAL-MAY87 H.NAKAMURA
DIST-SEP89 REV2-FEB94
----JENDL-3.2 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
****************************************************************
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-GEENLEES
/7/ AND HUIZENGA-IGO/8/, RESPECTIVELY.
LEVEL DENSITY PARAMETERS ARE BASED ON BUILT -IN VALUES.
MT=251 MU-BAR
CALCULATED WITH OPTICAL MODEL (CASTHY).
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.
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) BECCHETI, 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).