15-P - 31 FUJI E.C. EVAL-MAY87 H.NAKAMURA
DIST-SEP89 REV2-DEC93
----JENDL-3.2 MATERIAL 1525
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
87-05 NEWLY EVALUATED BY H.NAKAMURA (FUJI ELECTRIC CO.LTD)
93-12 JENDL-3.2
TOTAL CROSS SECTION WAS RECALCULATED BY T.WATANABE. (KHI)
GAMMA-RAY PRODUCTION CROSS SECTIONS WERE EVALUATED BY
T. ASAMI (DE).
***** MODIFIED PARTS FOR JENDL-3.2 ******************************
(3,1) A NEW OMP SET WAS DETERMINED.
(3,2) TOTAL - NONELASTIC
(3,107) Q-VALUE CORRECTED
MF=12,13,14,15 NEWLY EVALUATED
******************************************************************
MF=1 GENERAL INFORMATION
MT=451 DESCRIPTIVE DATA AND DICTIONARY
MF=2 MT=151 RESONANCE PARAMETERS:
RESOLVED RESONANCES FOR MLBW FORMULA : 1.0E-5 EV - 500 KEV
PARAMETERS ARE TAKEN FROM BNL 325 4TH EDITION/1/, AND
R.L.MACKLIN ET AL./2/.
CROSS SECTIONS CALCULATED WITH THESE PARAMETERS ARE TO
BE CORRECTED BY ADDING MF=3, MT=1,2AND 102 DATA.
CALCULATED 2200-M/S CROSS SECTIONS AND RESONANCE INTEGRALS
2200-M/SEC RES. INTEG. REF.
ELASTIC 3.134 B - /1/
CAPTURE 0.166 B 0.081 B /1/
TOTAL 3.300 B -
MF=3 NEUTRON CROSS SECTIONS
BELOW 500 KEV
BACKGROUND CROSS SECTION.
MT=1,2 0.07029 B
MT=251 MU-BAR=0.0217
ABOVE 500 KEV
MT=1 NEW OPTICAL MODEL CALCULATION USING THE PARAMETER
SET DETERMINED BY T. WATANABE
V = 50.58 - 0.06476E (MEV)
WS = 6.583 + 0.5927E (MEV)
VSO= 3.391 (MEV)
R = 1.36, A = 0.422(FM)
RS= 1.23, B = 0.517(FM)
RSO=0.938, ASO=0.600(FM)
MT=2 TOTAL - NONELASTIC
MT=4,51-56,91,102 TOTAL, ELASTIC, INELASTIC AND CAPTURE
CALCULATED WITH CASTHY CODE/3/, CONSIDERING THE
COMPETITION WITH THE THRESHOLD REACTION CHANNELS.
OPTICAL POTENTIAL PARAMETERS OF C.Y.FU/4/ ARE ADJUSTED
TO REPRODUCE THE FOLLOWING EXPERIMENTAL DATA:
MT=1 TOTAL NESTOR DATA (MANY AUTHORS)
MT=2 ELASTIC -
MT=4 INELASTIC -
THE SPHERICAL OPTICAL POTENTIAL PARAMETERS:
V=43.0 VSO=5.37 (MEV)
WS=9.13 WU =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 1.8 MB AT 500 KEV
BASED ON (7 MB AT 30 KEV) BY R.L.MACKLIN ET AL./5/.
THE DISCRETE LEVEL SCHEME TAKEN FROM REF./6/:
NO. ENERGY (MEV) SPIN-PARITY
(G.S.) 0.0 1/2 -
1 1.266 3/2 +
2 2.234 5/2 +
3 3.134 1/2 +
4 3.295 5/2 +
5 3.415 7/2 +
6 3.506 3/2 +
CONTINUUM LEVELS ASSUMED ABOVE 4.0 MEV. THE LEVEL
DENSITY PARAMETERS OF ASANO ET AL. /7/ ARE USED.
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 /8/, WITHOUT THE PRECOMPOUND REACTION CORRECTION.
TRANSMISSION COEFFICIENTS FOR PROTON AND ALPHA PARTICLE
ARE CALCULATED BY USING THE OMP OF BECCHETTI-GEENLEES
/9/ AND HUIZENGA-IGO/10/, RESPECTIVELY. IN THE CASES OF
MT=103 AND 107, THE EXPERIMENTAL DATA WERE ALSO
CONSIDERED TOGETHER WITH THE CALCULATIONS.
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=51-56 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 MULTIPLICITY
MT=102,103,107 CALCULATED BY SINCROS-II/11/.
MF=13 PHOTON PRODUCTION CROSS SECTION
MT=3 CALCULATED BY SINCROS-II/11/.
MT=4 DISCRETE LINES CALCULATED BY TAKING
ACCOUNT OF BRANCHING RATIOS
MF=14 PHOTON ANGULAR DISTRIBUTION
MT=3,4,102,103,107 ISOTROPIC
MF=15 PHOTON ENERGY DISTRIBUTION
MT=3,103,107 CALCULATED BY SINCROS-II/11/.
MT=102 CALCULATED BY CASTHY/3/.
REFERENCES
1) MUGHABGHAB, S.F. ET AL.: NEUTRON CROSS SECTION, VOL.1 (1981).
2) MACKLIN, R.L. ET AL.: PHYS. REV. C32, 379 (1985).
3) IGARASI, S.: J. NUCL. SCI. TECH. 12, 67 (1975).
4) FU, C.Y.: ATOM. DATA AND NUCL. DATA TABLES. 17, 127 (1976).
5) MACKLIN, R.L. ET AL.: PHYS. REV. 129, 2695 (1963).
6) LEDERER, C.M. ET AL.: TABLE OF ISOTOPES. 7TH EDIT.
7) ASANO ET AL.: PRIVATE COMMUNICATION.
8) YOUNG, P.G. AND ARTHUR, E.D.: LA-6947 (1977).
9) BECCHETI, JR. AND GREENLESS, G.W.: POLARIZATION PHENOMENA
IN NUCLEAR REACTIONS, P.682 (1971).
10) HUIZENGA, JR. AND IGO, G.J.: NUCL. PHYS. 29, 462 (1962).
11) YAMAMURO, N.: JAERI-M 90-006 (1990).