74-W -182
74-W -182 KHI,NEDAC EVAL-MAR87 T.WATANABE(KHI), T.ASAMI(NEDAC)
DIST-SEP89 REV2-JAN94
----JENDL-3.2 MATERIAL 7431
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
87-03 NEW EVALUATION WAS MADE FOR JENDL-3.
87-03 COMPILED BY T.ASAMI.
94-01 JENDL-3.2.
COMPILED BY T.NAKAGAWA (NDC/JAERI)
***** MODIFIED PARTS FOR JENDL-3.2 ********************
ALL CROSS SECTIONS EXCEPT TOTAL
THE INELASTIC SCATTERING, (N,2N), (N,3N), (N,NP),
(N,NA), (N,P), (N,D) AND (N,A) CROSS SECTIONS WERE
TAKEN FROM JENDL FUSION FILE. FURTHER MODIFICATION
WAS MADE FOR THE INELASTIC SCATTERING AND CAPTURE
CROSS SECTIONS.
(4,16-91), (5,16-91)
THESE DATA WERE TAKEN FROM JENDL FUSION FILE.
***********************************************************
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JENDL FUSION FILE /1/ (AS OF JAN. 1994)
EVALUATED BY K.KOSAKO (NEDAC) AND S. CHIBA (NDC/JAERI)
COMPILED BY K.KOSAKO.
DATA WERE TAKEN FROM JENDL-3.1 EXCEPT FOR THE FOLLOWING:
- THE INELASTIC SCATTERING CROSS SECTIONS TO THE LEVELS
ABOVE MT=59 AND ANGULAR DISTRIBUTIONS OF INELASTICALLY
SCATTERED NEUTRONS (EXCEPT CONTINUUM INELASTIC) WERE
CALCULATED WITH CASTHY2Y AND DWUCKY IN SINCROS-II
SYSTEM/2/ INCLUDING CONTRIBUTIONS FROM DIRECT REACTIONS.
- THE (N,2N), (N,3N), (N,NA), (N,NP), (N,P), (N,D) AND
(N,A) REACTION CROSS SECTIONS (MT=16, 17, 22, 28, 103,
104, 107) WERE CALCULATED BY EGNASH2 IN THE SINCROS-II.
- ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS WERE REPLACED
BY THOSE CALCULATED BY EGNASH2. THE DDX'S OF THE
CONTINUUM NEUTRONS WERE CALCULATED BY KUMABE'S SYSTEMA-
TICS /3/ USING F15TOB /1/. THE PRECOMPOUND/COMPOUND
RATIO WAS CALCULATED BY THE SINCROS- II CODE SYSTEM.
- OPTICAL-MODEL, LEVEL DENSITY AND OTHER PARAMETERS USED IN
THE SINCROS-II CALCULATION ARE DESCRIBED IN REF./2/.
LEVEL SCHEMES WERE DETERMINED ON THE BASIS OF ENSDF/4/.
-------------------------------------------------------------
MF=1 GENERAL INFORMATION
MT=451 DESCRIPTIVE DATA AND DICTIONARY
MF=2 RESONANCE PARAMETERS
MT=151 RESOLVED RESONANCE PARAMETERS
RESOLVED PARAMETERS FOR MLBW FORMULA WERE GIVEN IN THE ENERGY
REGION FROM 1.0E-5 EV TO 12 KEV.
PARAMETERS WERE EVALUATED IN EXAMINING BOTH THE EXPERIMENTAL
DATA/5,6,7/ AND THE RECOMMENDED DATA IN REF./8/. FOR UNKNOWN
RADIATIVE WIDTH, AN AVERAGE VALUE OF 53 MILLI-EV WAS ASSUMED.
PARAMETERS FOR A NEGATIVE RESONANCE WERE SELECTED SO THAT THE
2200 M/S CROSS SECTIONS AGREED WITH A RECOMMENDED CAPTURE CROSS
SECTION OF 20.7 BARNS/8/ AND THE EXPERIMENTAL DATA FOR TOTAL
CROSS SECTIONS AROUND THERMAL ENERGIES. THE SCATTERING RADIUS
WAS ASSUMED TO BE 7.5 FERMI.
CALCULATED 2200 M/SEC CROSS SECTIONS AND RESONANCE INTEGRALS
ARE AS FOLLOWS:
2200 M/S CROSS SECTION(B) RES. INTEGRAL(B)
ELASTIC 8.84
CAPTURE 20.7 629.
TOTAL 29.5
MF=3 NEUTRON CROSS SECTIONS
BELOW 12 KEV, ZERO BACKGROUND CROSS SECTION WAS GIVEN AND ALL
THE CROSS-SECTION DATA ARE REPRODUCED FROM THE EVALUATED
RESOLVED RESONANCE PARAMETERS.
FOR JENDL-3.1, ABOVE 12 KEV, THE TOTAL AND PARTIAL CROSS
SECTIONS WERE GIVEN MAINLY BASED ON THE THEORETICAL CALCULA-
TIONS. THE TOTAL, ELASTIC AND INELASTIC SCATTERING, AND CAPTURE
CROSS SECTIONS WERE CALCULATED WITH THE COUPLED-CHANNEL MODEL
AND THE SPHERICAL OPTICAL-STATISTICAL MODEL. THE CALCULATIONS
WERE PERFORMED WITH A COMBINED PROGRAM OF CASTHY/9/ AND
ECIS/10/. THE OPTICAL POTENTIAL PARAMETERS USED ARE:
V = 48.83 - 0.0809*EN, VSO = 5.6 (MEV)
WS = 6.73 - 0.0536*EN, WV = 0 (MEV)
R = 1.168, RS = 1.268, RSO = 1.592 (FM)
A = 0.617, ASO = 0.664, B = 0.563 (FM)
THE DEFORMED POTENTIAL PARAMETERS WERE TAKEN FROM THE WORK OF
DELAROCHE/11/.
FOR JENDL-3.2, ALL CROSS SECTION DATA EXCEPT FOR THE TOTAL,
ELASTIC SCATTERING AND CAPTURE WERE ADOPTED FROM JENDL FUSION
FILE. THE CALCULATION WAS MADE WITH SINCROS-II SYSTEM/2/ BY
ADOPTING WALTER-GUSS OMP MODIFIED BY YAMAMURO/2/ FOR NEUTRON,
PEREY OMP /12/ FOR PROTON, LEMOS OMP MODIFIED BY ARTHUR AND
YOUNG/13/ FOR ALPHA, LOHR-HAEBERLI OMP/14/ FOR DEUTERON,
BECCHETTII-GREENLEES OMP/15/ FOR TRITON AND HE-3, AND STANDARD
LEVEL DENSITY PARAMETERS OF SINCROS-II SYSTEM.
MT=1 TOTAL
CALCULATED WITH THE COMBINED PROGRAM OF THE ECIS AND CASTHY
CODES. ALMOST THE SAME AS JENDL-3.1.
MT=2 ELASTIC SCATTERING
OBTAINED BY SUBTRACTING THE SUM OF THE PARTIAL CROSS SECTIONS
FROM THE TOTAL CROSS SECTION.
MT=4, 51-70, 91 INELASTIC SCATTERING
THE DATA OF MT=51 TO 58 WERE CALCULATED WITH THE COMBINED
PROGRAM OF ECIS/10/ AND CASTHY /9/. THESE CROSS SECTIONS IN
JENDL-3.2 ARE THE SAME AS JENDL-3.1 EXCEPT THAT NEW CALCULATION
WAS MADE AT SEVERAL ENERGY POINTS. THE OTHER CROSS SECTIONS
WERE CALCULATED WITH SINCROS-II FOR JENDL FUSION FILE. THE
LEVEL SCHEME WAS BASED ON REF./4/ CONTRIBUTIONS OF THE DIRECT
PROCESS WAS CALCULATED FOR THE LEVELS MARKED WITH '*'.
NO. MT ENERGY(MEV) SPIN-PARITY (DIRECT PROCESS)
G.S. 0.0 0+
1 51 0.1001 2+ *
2 52 0.3294 4+ *
3 53 0.6805 6+ *
4 54 1.1358 0+
5 55 1.1444 8+ *
6 56 1.2214 2+
7 56 1.2574 2+
8 56 1.2892 2-
9 57 1.3311 3+
10 57 1.3738 3-
11 58 1.4428 4+
12 58 1.4875 4-
13 58 1.5102 4+
14 58 1.5532 4-
15 58 1.6213 5-
16 58 1.6235 5+
17 58 1.6604 5-
18 59 1.7119 10+ *
19 60 1.7568 6+
20 61 1.7654 4+
21 62 1.7690 5-
22 63 1.8097 5-
23 64 1.8109 6-
24 65 1.8134 4-
25 66 1.8295 6-
26 67 1.8331 2-
27 68 1.8560 2+
28 69 1.8569 2+
29 70 1.8712 1-
LEVELS ABOVE 1.872 MEV WERE ASSUMED TO BE OVERLAPPING. DATA OF
LEVELS 6-8, 9-10 AND 11-17 WERE LUMPED AS IS INDICATED IN THE
ABOVE TABLE. THE DIRECT INELASTIC SCATTERING CROSS SECTION WAS
CALCULATED ALSO FOR THE LEVELS AT 1.959, 2.372, 2.493, 3.112,
3.397, 3.6, 4.0, 4.5, 5.0, 5.5 AND 6.0 MEV AND ADDED TO MT=91.
MT=16, 17, 22, 28, 103, 104, 107
(N,2N), (N,3N), (N,NA), (N,NP), (N,P), (N,D), (N,A)
ADOPTED FROM JENDL FUSION FILE. THEORETICAL CALCULATION WAS
MADE WITH SINCROS-II. THE RESULTS WERE NORMALIZED TO
(N,2N) 2.161 B AT 14.7 MEV MEASURED BY QAIM/16/,
(N,P) 0.0059 B AT 14.7 MEV MEASURED BY QAIM/16/,
(N,D)+(N,NP) 0.002 B AT 14.7 MEV (SYSTEMATICS OF QAIM/16/),
(N,A) 0.002 B AT 14.7 MEV (SYSTEMATICS OF QAIM/16/).
MT=102 CAPTURE
CALCULATED WITH THE CASTHY CODE/9/ AND NORMALIZED TO 72+-9 MB
AT 500 KEV OF VOIGNIER ET AL./17/. FOR JENDL-3.2, ABOVE 3
MEV, A STRAIGHT LINE IN LOG-LOG SCALE WAS ADOPTED ASSUMING 1.0
MILLI-BARN AT 14 MEV.
MT=251 MU-BAR
CALCULATED WITH THE OPTICAL MODEL.
MF=4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
(MT=2, 51-58: THE SAME AS JENDL-3.1)
MT=2
CALCULATED WITH THE CASTHY CODE/9/.
MT=51-58
CALCULATED WITH THE COMBINED PROGRAM OF THE CASTHY/9/ AND
ECIS/10/ CODES.
MT=59-70
TAKEN FROM JENDL FUSION FILE.
MT=16, 17, 22, 28, 91
TAKEN FROM JENDL FUSION FILE.
MF=5 ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=16, 17, 22, 28, 91
TAKEN FROM JENDL FUSION FILE.
REFERENCES
1) CHIBA, S. ET AL.: JAERI-M 92-027, P.35 (1992).
2) YAMAMURO, N.: JAERI-M 90-006 (1990).
3) KUMABE, I. ET AL.: NUCL. SCI. ENG., 104, 280 (1990).
4) ENSDF: EVALUATED NUCLEAR STRUCTURE DATA FILE, BNL/NNDC.
5) CAMARDA H.S. ET AL. : PHYS. REV. C8, 1813 (1973).
6) OHKUBO M. : JAERI-M 5624 (1974).
7) MACKLIN R.L. ET AL. : LA-9200-MS (1982).
8) MUGHABGHAB S.F. AND GARBER D.I. :"NEUTRON CROSS SECTIONS",
VOL. 2, PART B (1984).
9) IGARASI S. AND FUKAHORI T.: JAREI 1321 (1991).
10) RAYNAL J. : IAEA-SMR-9/8 P.281 (1972).
11) DELAROCHE J.F. ET AL. : 1979 KNOXVILLE CONF. 336 (1979).
12) PEREY F.G.: PHYS. REV., 131, 745 (1963).
13) ARTHUR, E.D. AND YOUNG, P.G.: LA-8626-MS (1980).
14) LOHR J.M. AND HAEBERLI W.: NUCL. PHYS., A232, 381 (1974).
15) BECCHETTI F.D. JR. AND GREENLEES G.W.: "POLARIZATION
PHENOMENA IN NUCL. REACTIONS," UNIV. WISCONSIN PRESS, P.682
(1971).
16) QAIM,S.M. AND GRACA, C.: NUCL. PHYS., A242, 317 (1975).
17) VOIGNIER J. ET AL.: NUCL. SCI. ENG., 93, 43 (1986).