14-Si- 0
14-SI- 0 TIT,JAERI EVAL-MAR88 H.KITAZAWA,Y.HARIMA,T.FUKAHORI
DIST-SEP89 REV2-NOV93
----JENDL-3.2 MATERIAL 1400
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
88-03 NEW EVALUATION WAS PERFORMED FOR JENDL-3 BY KITAZAWA,
HARIMA (TOKYO INSTITUTE OF TECH.) AND FUKAHORI (JAERI).
DETAILS ARE GIVEN IN REF./1/.
88-03 COMPILED BY FUKAHORI.
93-11 JENDL-3.2
COMPILED BY T.NAKAGAWA (NDC/JAERI)
***** MODIFIED PARTS FOR JENDL-3.2 ********************
(3,2) EFFECTS OF MODIFICATION OF INELASTIC
SCATTERING CROSS SECTIONS.
(3,4), (3,51-89) CROSS-SECTION CURVES WERE SMOOTHED.
(4,16-28), (4,91) TAKEN FROM JENDL FUSION FILE
(5,16-91) TAKEN FROM JENDL FUSION FILE
(12,51-71) UPPER BOUNDARIES OF ENERGY RANGE WHERE
MULTIPLICITIES ARE GIVEN.
(12,102) FROM ENERGY BALANCE
***********************************************************
-------------------------------------------------------------
JENDL FUSION FILE /2/ (AS OF NOV. 1993)
EVALUATED AND COMPILED BY S.CHIBA (NDC/JAERI)
ALL CROSS SECTION DATA, ANGULAR DISTRIBUTIONS OF
DISCRETE LEVELS AND ENERGY DISTRIBUTIONS WERE TAKEN FROM
JENDL-3.1. THE ENERGY DISTRIBUTIONS WERE MODIFIED TO A
SINGLE TABLE TYPE DISTRIBUTION. MF=6 OF MT=16, 22, 28, AND
91 WERE CREATED BY F15TOB PROGRAM/2/ BY USING KUMABE'S
SYSTEMATICS/3/. THE PRECOMPOUND/COMPOUND RATIO WAS TAKEN
FROM THE SINCROS-II CALCULATION/4/.
OPTICAL-MODEL, LEVEL DENSITY AND OTHER PARAMETERS USED
IN THE SINCROS-II CALCULATION ARE DESCRIBED IN REF./4/.
-------------------------------------------------------------
MF=1 GENERAL INFORMATION
MT=451 DESCRIPTIVE DATA AND DICTIONARY
MF=2 RESONANCE PARAMETERS:
MT=151
RESOLVED RESONANCES : 1.0E-5 EV - 1.81 MEV
THE RESONANCE PARAMETERS WERE SEARCHED, USING MLBW FORMULA/5/.
AN INITIAL GUESS OF THE PARAMETERS SEARCH WAS TAKEN FROM REF.
/6/.
CALCULATED 2200-M/S CROSS SECTIONS AND RESONANCE INTEGRALS
2200-M/SEC RES. INTEG.
ELASTIC 2.172 B -
CAPTURE 0.171 B 0.104 B
TOTAL 2.343 B -
MF=3 NEUTRON CROSS SECTIONS
MT=1 TOTAL CROSS SECTION
BETWEEN 1.81 AND 12.5 MEV, THE CROSS SECTIONS WERE OBTAINED BY
AN EYE-GUIDE SO AS TO FOLLOW MAINLY THE EXPERIMENTAL DATA OF
CIERJACKS ET AL./7/ ABOVE 12.5 MEV, THE CROSS SECTIONS WERE
CALCULATED WITH THE STATISTICAL-MODEL CODE CASTHY./1,8/
MT=2 ELASTIC SCATTERING CROSS SECTIONS
OBTAINED BY SUBTRACTING PARTIAL CROSS SECTIONS FROM THE
TOTAL CROSS SECTIONS.
MT=4,51-90,91 INELASTIC SCATTERING CROSS SECTIONS
CALCULATED WITH THE STATISTICAL-MODEL CODE CASTHY /8/ AND THE
COUPLED-CHANNEL MODEL CODE ECIS /9/ OR JUPITOR-1 /10/, TAKING
ACCOUNT OF COMPETITIVE PROCESSES FOR NEUTRON, PROTON, ALPHA-
PARTICLE AND GAMMA-RAY EMISSION./1/ BELOW 11 MEV, THE IMAGINARY
POTENTIAL STRENGTH OF THE NEUTRON SPHERICAL OPTICAL POTENTIAL
WAS MODIFIED FROM THAT IN REF./1/ TO BE W = 1.09 + 0.55*E
(MEV).
LEVEL SCHEME WAS TAKEN FROM REF./11/.
SI-28 SI-29 SI-30
ENERGY(MEV) J-PI ENERGY(MEV) J-PI ENERGY(MEV) J-PI
0.0 0 + 0.0 1/2+ 0.0 0 +
1.7789 2 + 1.2733 3/2+ 2.2355 2 +
4.6178 4 + 2.4256 3/2+ 3.7696 1 +
4.9791 0 + 3.6235 7/2- 4.8090 2 +
6.2765 3 + 4.7410 9/2+ 5.2300 3 +
6.6914 0 + 4.8950 5/2+ 5.3720 0 +
6.8786 3 - 5.2546 9/2- 5.6130 2 +
6.8888 4 + 5.6520 9/2+ 6.5030 4 -
7.3807 2 + 5.9490 3/2+ 6.6340 2 -
7.4173 2 + 6.1910 7/2- 6.7447 1 -
7.7988 3 + 6.4240 7/2+ 6.9140 2 +
7.9334 2 + 6.5220 3/2+
8.2590 2 + 6.6970 3/2-
8.3280 1 + 6.7150 3/2+
8.4133 4 - 6.9070 1/2-
8.5430 6 +
8.5890 3 +
Q-VALUES GIVEN IN JENDL-3.2 WERE SLIGHTLY CHANGED TO BE
CONSISTENT WITH AWR AND THRESHOLD ENERGIES.
CONTINUUM LEVELS WERE ASSUMED ABOVE 6.999 MEV. LEVEL DENSITY
WAS CALCULATED, USING THE GILBERT-CAMERON FORMULA. THE LEVEL
DENSITY PARAMETERS WERE OBTAINED FROM A CUMULATIVE PLOT OF
OBSERVED LEVELS./1/.
FOR JENDL-3.2, CROSS SECTIONS AT THRESHOLD ENERGIES OF THE
LEVELS WERE INSERTED BY INTERPOLATING THE CALCULATED CROSS
SECTIONS.
MT=16 (N,2N) CROSS SECTIONS
CALCULATED BY THE STATISTICAL MODEL, USING THE GNASH CODE./1,
12/ BELOW 11 MEV, THE IMAGINARY POTENTIAL STRENGTH OF THE
NEUTRON SPHERICAL OPTICAL POTENTIAL WAS MODIFIED FROM THAT IN
REF./1/ TO BE W = 1.09 + 0.55*E (MEV).
MT=22 (N,NA) CROSS SECTIONS
CALCULATED BY THE STATISTICAL MODEL, USING THE GNASH CODE./1,
12/ OPTICAL POTENTIAL FOR ALPHA-PARTICLES WAS DETERMINED, USING
THE DISPERSION THEORY./13/
MT=28 (N,NP) CROSS SECTIONS
CALCULATED BY THE STATISTICAL MODEL, USING THE GNASH
CODE/1,12/.
MT=102 CAPTURE
CALCULATED WITH THE STATISTICAL-MODEL CODE CASTHY /8/ AND THE
DIRECT-SEMIDIRECT-MODEL CODE HIKARI /14/. Q-VALUE WAS
DETERMINED AS A MEAN VALUE OF THOSE OF ISOTOPES.
MT=103 (N,P) CROSS SECTIONS
CALCULATED BY THE STATISTICAL MODEL, USING THE GNASH CODE./1,
12/ THE IMAGINARY POTENTIAL STRENGTH OF THE PROTON SPHERICAL
OPTICAL MODEL WAS MODIFIED FROM THAT IN REF./1/ TO BE W = 11.0
MEV BETWEEN 11 AND 20 MEV AND W = 8.8 + 0.2*E (MEV) BELOW 11
MEV.
MT=107 (N,A) CROSS SECTIONS
CNSTRUCTED FROM THE ISOTOPIC DATA.
MT=111 (N,2P) CROSS SECTIONS
CALCULATED BY THE STATISTICAL MODEL, USING THE GNASH CODE./1,
12/
MT=251 MU-BAR
CALCULATED WITH STATISTICAL-MODEL CODE CASTHY /1,8/.
MF=4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=2
CALCULATED WITH THE STATISTICAL-MODEL CODE CASTHY /1,8/.
MT=51-90
INCOHERENT SUM OF THE STATISTICAL MODEL AND COUPLED-CHANNEL
MODEL CALCULATIONS./1/ CALCULATED WITH CASTHY AND ECIS OR
JUPITOR-1.
MT=16,22,28,91
TAKEN FROM JENDL FUSION FILE, AND TRANSFORMED INTO THE LAB.
SYSTEM.
MF=5 ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=16,22,28,91
TAKEN FROM JENDL FUSION FILE, AND TRANSFORMED INTO THE LAB.
SYSTEM.
MF=12 GAMMA-RAY MULTIPLICITIES (BELOW 9.22087 MEV)
MT=51-90,103,107
CALCULATED BY USING THE GNASH CODE./1,12/
MT=102
FROM ENERGY BALANCE.
MF=13 GAMMA-RAY PRODUCTION CROSS SECTIONS
MT=3 (ABOVE 9.22087 MEV)
CALCULATED BY THE STATISTICAL MODEL AND COUPLED-CHANNEL MODEL,
USING THE GNASH CODE /12/ AND THE ECIS /9/ OR JUPITOR-1 CODE
/10/. BRANCHING RATIOS FOR TRANSITIONS BETWEEN DISCRETE LEVELS
WERE TAKEN FROM REF./11/. GAMMA-RAY TRANSITION STRENGTH IN THE
CONTINUUM WAS CALCULATED BY THE BRINK-AXEL GIANT RESONANCE
MODEL FOR E1 TRANSITION AND BY THE WEISSKOPF SINGLE-PARTICLE
MODEL FOR E2 AND M1 TRANSITION./1/
MF=14 GAMMA-RAY ANGULAR DISTRIBUTIONS
MT=3,51-90,102,103,107
ISOTROPIC DISTRIBUTION WAS ASSUMED.
MF=15 GAMMA-RAY SPECTRA
MT=3,102,103,107
CALCULATED WITH THE GNASH CODE./1,12/
REFERENCES
1) KITAZAWA H. ET AL.: PROC. INT. CONF. NUCLEAR DATA FOR SCIENCE
AND TECHNOLOGY, MITO, 1988, P.473, (1988).
2) CHIBA S. ET AL.: JAERI-M 92-027, P.35 (1992).
3) KUMABE I. ET AL.: NUCL. SCI. ENG., 104, 280 (1990).
4) YAMAMURO N.: JAERI-M 90-006 (1990).
5) NAKAGAWA T.: JAERI-M 84-192 (1984).
6) MUGHABGHAB S.F. ET AL.: "NEUTRON CROSS SECTIONS, VOL. 1 PART
A", ACADEMIC PRESS (1981).
7) CIERJACKS S. ET AL.: KFK-1000, SUPP., (1968).
8) IGARASI S. AND FUKAHORI T.: JAERI 1321 (1991).
9) RAYNAL J.: COMPUTER PROGRAM ECIS79 FOR COUPLED-CHANNEL
CALCULATIONS, 1979 (UNPUBLISHED).
10) TAMURA T.: REV. MOD. PHYS., 37, 679 (1965).
11) ENDT P.M. AND VAN DER LEUN C.: NUCL. PHYS., A310, 1 (1978).
12) YOUNG P.G. AND ARTHUR E.D.: LA-6947 (1977).
13) KITAZAWA H. ET AL.: UNPUBLISHED.
14) KITAZAWA H.: COMPUTER PROGRAM HIKARI FOR DIRECT-SEMIDIRECT
CAPTURE CALCULATIONS, 1980 (UNPUBLISHED).