19-K - 0 FUJI E.C. EVAL-MAY87 H.NAKAMURA
DIST-SEP89 REV2-FEB94
----JENDL-3.2 MATERIAL 1900
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
87-05 NEWLY EVALUATED BY H.NAKAMURA (FUJI ELECTRIC CO. LTD.)
87-07 COMPILED BY T.FUKAHORI (JAERI).
94-02 JENDL-3.2
TOTAL CROSS SECTION WAS CALCULATED BY T. WATANABE (KHI).
INELASTIC SCATTERING CROSS SECTIONS WERE CALCULATED BY
K.SHIBATA (JAERI).
GAMMA PRODUCTION DATA WERE EVALUATED BY T. ASAMI (DE).
DATA WERE COMPILED BY K.SHIBATA.
***** MODIFIED PARTS FOR JENDL-3.2 ****************************
(3,1),(3,4),(3,51-91),(3,251),(4,2),(4,51-61)
NEW OPTICAL AND STATISTICAL MODEL CAL.
(3,2) TOTAL - NONELASTIC
(5,16-91) SUBSECTIONS WERE COMBINED.
MF=12,13,14,15 NEWLY EVALUATED.
****************************************************************
NATURAL POTASSIUM CONSTRUCTED FROM ITS ISOTOPES.
MF=1 GENERAL INFORMATION
MT=451 DESCRIPTIVE DATA AND DICTIONARY
MF=2 RESONANCE PARAMETERS
MT=151 RESOLVED RESONANCES
RESONANCE REGION : 1.0E-5 EV - 200 KEV
THE MULTILEVEL BREIT-WIGNER FORMULA WAS USED. PARAMETERS
WERE ADOPTED FROM THE FOLLOWING SOURCES.
K-39 : -4.0 - 200 KEV, R = 1.80 FM
K-41 : -6.6 - 125 KEV, R = 2.00 FM
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS.
2200-M/S RES. INTEG.
ELASTIC 2.096 B -
CAPTURE 2.058 B 1.118 B
TOTAL 4.159 B -
MF=3 NEUTRON CROSS SECTIONS
BELOW 200 KEV, BACKGROUND CROSS SECTIONS CONSISTED OF
ELASTIC, CAPTURE, (N,P) AND (N,ALPHA) CROSS SECTIONS
WERE GIVEN.
MT=1 TOTAL
FOR ENERGIES 0.2 - 20 MEV, THE WEIGHTED SUM OF ISOTOPES
DATA WERE TAKEN. THE ISOTOPIC CALCULATIONS WERE PERFORMED
BY USING CASTHY CODE/1/.
MT=2 ELASTIC SCATTERING
GIVEN AS TOTAL MINUS OTHER CROSS SECTIONS.
MT=4 TOTAL INELASTIC SCATTERING
SUM OF MT=51-61, 91
MT=16,22,28,103,107
THE WEIGHTED SUM OF ISOTOPES WAS ADOPTED. THE CROSS
SECTIONS OF ISOTOPES WERE CALCULATED USING GNASH CODE/2/.
MT=51-61,91 INELASTIC SCATTERING
ISOTOPIC DATA WERE OBTAINED FROM THE CASTHY/1/
CALCULATION. ISOTOPIC LEVELS WERE SORTED WITH ENERGIES.
OPTICAL POTENTIAL PARAMETERS USED IN THE CALCULATION ARE
AS FOLLOWS:
V = 46.72, R0 = 1.26, A0 = 0.76
WS = 9.13, RS = 1.39, AS = 0.40
VSO= 5.37, RSO= 1.26, ASO= 0.76
ENERGIES IN MEV UNIT, LENGTHS IN FM UNIT.
***** JENDL-3.2 ***************************************
THE CROSS SECTIONS WERE CALCULATED 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 = 1.200 , A = 0.658 (FM)
RS = 1.320 , B = 0.602 (FM)
RSO= 1.100 , ASO= 0.406 (FM)
********************************************************
MT=102 CAPTURE
ABOVE 200 KEV, THE CASTHY/1/ CALCULATION WAS ADOPTED.
MT=103(N,P), 107(N,ALPHA)
ABOVE 200 KEV, BASED ON CALCULATIONS USING THE GNASH/2/
CODE.
MT=251 MU-BAR
CALCULATED WITH CASTHY/1/.
MF=4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=2,51-61
OPTICAL AND STATISTICAL-MODEL CALCULATIONS.
MT=16,22,28
ASSUMED TO BE ISOTROPIC IN THE LABORATORY SYSTEM.
MT=91
ISOTROPIC DISTRIBUTIONS IN C.M. WERE CONVERTED TO THE
DISTRIBUTIONS IN LAB.
MF=5 ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=16,22,28,91
CALCULATED WITH GNASH/2/.
MF=12 PHOTON PRODUCTION MULTIPLICITY
MT=102,103,107
CALCULATED WITH SINCROS-II/3/.
MF=13 PHOTON PRODUCTION CROSS SECTION
MT=3
CALCULATED WITH SINCROS-II/3/.
MT=4
GENERATED BY TAKING ACCOUNT OF BRANCHING RATIOS.
MF=14 PHTON ANGULAR DISTRIBUTION
MT=3,4,102,103,107
ASSUMED TO BE ISOTROPIC.
MF=15 PHOTON ENERGY DISTRIBUTION
MT=3,4,103,107
CALCULATED WITH SINCROS-II/3/.
MT=102
CALCULATED WITH CASTHY/1/.
REFERENCES
1) IGARASI, S. : J. NUCL. SCI. TECHNOL., 12, 67 (1975).
2) YOUNG, P.G. AND ARTHUR, E.D.: LA-6947 (1977).
3) YAMAMURO, N: JAERI-M 90-006 (1990).