16-S - 0 FUJI E.C. EVAL-MAY87 H.NAKAMURA
DIST-SEP89 REV2-FEB94
----JENDL-3.2 MATERIAL 1600
-----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).
88-02 MODIFICATIONS ON (N,P) AND INELASTIC SCATTERING CROSS
SECTIONS OF S-32. DIRECT INELASTIC COMPONENTS FROM DWBA
CALCULATIONS WERE ADDED TO THE COMPOUND COMPONENTS AS TO
REPRODUCE DDX DATA OF OKTAVIAN (OSA, 1986).
88-08 MODIFIED DUE TO CORRECT S-32 DATA BY T.FUKAHORI (JAERI)
94-02 JENDL-3.2
NEW OPTICAL MODEL CALCULATION WAS PERFORMED BY T. WATANABE
(KHI).
GAMMA PRODUCTION DATA WERE EVALUATED BY T. ASAMI (DE).
DATA WERE COMPILED BY K. SHIBATA (JAERI).
***** MODIFIED PARTS FOR JENDL-3.2 ******************
(3,1),(3,4),(3,51-73),(3,91),(3,251),(4,2),(4,51-73)
OPTICAL AND STATISTICAL MODEL CALCULATIONS.
CONSTRUCTED FROM ISOTOPIC FILES.
(3,2) TOTAL - NONELASTIC
(5,16-91) SUBSECTIONS COMBINED.
MF=12,13,14,15 GAMMA PRODUCTION DATA
*******************************************************
NATURAL SULPHUR DATA CONSTRUCTED FROM S-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 - 1.57 MEV
THE MULTILEVEL BREIT-WIGNER FORMULA WAS USED. PARAMETERS
WERE ADOPTED FROM THE FOLLOWING SOURCES.
S-32 : -10 KEV - 1.57 MEV, R = 3.92 FM
S-33 : -7.1 - 260 KEV, R = 3.85 FM
S-34 : -10 - 480 KEV, R = 3.60 FM
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS.
2200-M/S RES. INTEG.
ELASTIC 1.024 B -
CAPTURE 0.514 B 0.2428 B
TOTAL 1.546 B -
MF=3 NEWTRON CROSS SECTIONS
BELOW 1.57 MEV, BACKGROUND CROSS SECTIONS CONSISTING OF
(N,P) AND (N,ALPHA) CROSS SECTIONS WERE GIVEN.
MT=1 TOTAL
SPHERICAL AND DEFORMED OPTICAL POTENTIAL PARAMETERS
WERE DETERMINED SO AS TO REPRODUCE THE EXPERIMENTAL DATA
OF CIERJACKS+/1/. THE SHERICAL POTENTIALS WERE USED IN
CALCULATING THE CROSS SECTIONS OF S-32, WHILE THE
DEFORMED ONES WERE USED IN CALCULATING THE CROSS SECTIONS
OF THE OTHER ISOTOPES. THE ISOTOPIC CALCULATIONS WERE
PERFORMED BY USING CASTHY CODE/2/.
MT=2 ELASTIC SCATTERING
GIVEN AS TOTAL MINUS OTHER CROSS SECTIONS.
MT=4 TOTAL INELASTIC SCATTERING
SUM OF MT=51-73, 91
MT=16,22,28,103,107
THE WEIGHTED SUM OF ISOTOPES WAS ADOPTED. THE CROSS
SECTIONS OF ISOTOPES WERE CALCULATED USING GNASH CODE/3/.
MT=51-73,91 INELASTIC SCATTERING
ISOTOPIC DATA WERE OBTAINED FROM THE CASTHY/2/
CALCULATION. ISOTOPIC LEVELS WERE SORTED WITH ENERGIES.
******************************************************
OPTICAL-MODEL POTEMTIAL PARAMETERS USED FOR THE JENDL-3.2
EVALUATION:
V = 58.83 - 0.5635EN (MEV)
WS = 3.609 + 0.1819EN (MEV)
( = 2.518 + 0.0302EN (MEV) FOR DEFORMED POT.)
VSO= 4.199 (MEV)
R = 1.306, A = 0.452 (FM)
RS = 1.124, B = 0.690 (FM)
RSO= 1.010, ASO= 0.750 (FM).
********************************************************
MT=102 CAPTURE
ABOVE 1.57 MEV, THE CASTHY/2/ CALCULATION WAS ADOPTED.
MT=103(N,P), 107(N,ALPHA)
FOR S-32 THE EVALUATION WAS MADE ON THE BASIS OF
EXPERIMENTAL DATA. FOR S-33,34,36, THE GNASH/3/
CALCULATION WAS ADOPTED.
MT=251 MU-BAR
CALCULATED WITH CASTHY/2/.
MF=4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=2,51-73
OPTICAL AND STATISTICAL-MODEL CALCULATIONS.
MT=16,22,28
ASSUMED TO BE 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
CALCULATED WITH GNASH/3/.
MF=12 PHOTON PRODUCTION MULTIPLICITY
MT=102,103,107
CALCULATED WITH SINCROS-II/4/.
MF=13 PHOTON PRODUCTION CROSS SECTION
MT=3
CALCULATED WITH SINCROS-II/4/.
MT=4
CALCULATED BY TAKING ACCOUNT OF BRANCHING RATIOS.
MF=14 PHOTON ANGULAR DISTRIBUTION
MT=3,4,102,103,107
ASSUMED TO BE ISOTROPIC.
MF=15 PHOTON ENERGY DISTRIBUTION
MT=3,102,103,107
CALCULATED WITH SINCROS-II/4/.
REFERENCES
1) CIERJACKS, S. ET AL.: KFK-1000 (1968)
2) IGARASI, S. : J. NUCL. SCI. TECHNOL., 12, 67 (1975).
3) YOUNG, P.G. AND ARTHUR, E.D.: LA-6947 (1977).
4) YAMAMURO, N: JAERI-M 90-006 (1990).