41-Nb- 93
41-NB- 93 NAIG EVAL-NOV88 M.KAWAI, N.YAMAMURO
DIST-SEP89 REV2-FEB94
----JENDL-3.2 MATERIAL 4125
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
82-10 EVALUATION OF RESONANCE PARAMETERS FOR JENDL-2 WAS MADE
BY KAWAI.
88-10 EVALUATION WAS PERFORMED FOR JENDL-3.
88-10 COMPILED BY K.SHIBATA (JAERI).
94-02 JENDL-3.2
RESONANCE PARAMETERS MODIFIED BY M.KAWAI(TOSHIBA).
GAMMA-RAY PRODUCTION DATA BY S.IGARASI(NEDAC).
OTHER DATA WERE ADOPTED FROM JENDL FUSION FILE.
COMPILED BY T.NAKAGAWA
***** MODIFIED PARTS FOR JENDL-3.2 ********************
(2,151) RESOLVED RESONANCE PARAMETERS MODIFIED
(3,1), (3,2), (3,4), (3,51-91) FROM JENDL FUSION FILE
(4,16-91) TAKEN FROM JENDL FUSION FILE
(5,16-91) TAKEN FROM JENDL FUSION FILE
(12,102) BELOW 100 KEV
(15,102) BELOW 100 KEV
***********************************************************
-------------------------------------------------------------
JENDL FUSION FILE /1/ (AS OF FEB. 1994)
EVALUATED BY B.YU(CIAE) AND S.CHIBA (NDC/JAERI)
COMPILED BY S.CHIBA.
- CROSS SECTIONS WERE MAINLY TAKEN FROM JENDL-3.1 EXCEPT
FOR THE (N,2N) AND CONTINUUM INELASTIC SCATTERING CROSS
SECTIONS WHICH WERE TAKEN FROM THE SINCROS-II/2/
CALCULATION. INTERPOLATION SCHEME OF THE DISCRETE
INELASTIC SCATTERING CROSS SECTIONS WAS CHANGED FROM 3
TO 2. THE TOTAL CROSS SECTION AT 10 AND 15 KEV, WHICH
IS THE BACKGROUND CROSS SECTION, WERE SET TO 0.0.
- ENERGY DISTRIBUTIONS WERE REPLACED WITH THE SINCROS-II
CALCULATION.
- MF=6 WAS MADE BY THE F15TOB PROGRAM/1/. THE PRECOM-
UND TO COMPOUND RATIO WAS TAKEN FROM OUTPUT OF THE
SINCROS-II CALCULATION. KALBACH'S SYSTEMATICS/3/ WAS
ADOPTED FOR DDX.
- 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 RESONANCES: 1.0E-5 EV - 7 KEV
PARAMETERS IN JENDL-3.1 WERE TAKEN FROM JENDL-2 BY MODIFING J
VALUES. THE JENDL-2 PARAMETERS WERE EVALUATED ON THE BASIS
OF FOLLOWING MEASUREMENTS:
TRANSMISSION BY GARG ET AL./5/, POITTEVIN ET AL./6/
AND ILIESCU ET AL./7/
SCATTERING BY ILIESCU ET AL./7/
CAPTURE BY MACKLIN /8/, LOPEZ ET AL./9/ AND
ILIESCU ET AL. /7/
J VALUES DETERMINED BY HASTE ET AL. /10/ WERE ADOPTED.
AVERAGE RADIATIVE WIDTH WAS ASSUMED TO BE 0.172 EV (0.212 EV
FOR DOUBLET), AND SCATTERING RADIUS TO BE 7.10 FM. THE J
VALUES OF RESONANCES WITHOUT KNOWN J VALUES WERE RANDOMLY
ASSIGNED.
FOR JENDL-3.2, RE-ASSIGNMENT OF J AND MODIFICATION OF NEUTRON
AND RADIATIVE WIDTHS WERE MADE TO REPRODUCE THE MEASURED
CAPTURE AREA DATA/8/.
UNRESOLVED RESONANCES: 7 KEV - 100 KEV
DETERMINED WITH THE ASREP CODE/11/ SO AS TO REPRODUCE
THE EVALUATED SIG-C AND SIG-T UP TO 100 KEV.
TYPICAL PARAMETERS AT 70 KEV:
S0= 0.4E-4, S1=6.68E-4, D-OBS=96.0 EV, R=6.477 FM,
RADIATIVE WIDTH= 0.172 EV
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS
2200-M/S RES. INTEG.
ELASTIC 6.319 B -
CAPTURE 1.149 B 9.445 B
TOTAL 7.468 B -
MF=3 NEUTRON CROSS SECTIONS
MT=1 TOTAL
BELOW 100 KEV : BACKGROUND CROSS SECTIONS GIVEN.
100 KEV TO 20 MEV: SPLINE-FUNCTION FITTING TO THE
EXPERIMENTAL DATA/12/.
MT=2 ELASTIC SCATTERING
(TOTAL) - (REACTION CROSS SECTION)
MT=4,51-62,91 INELASTIC SCATTERING
THE INELASTIC SCATTERING CROSS SECTIONS TO DISCRETE LEVELS
WERE CALCULATED WITH THE STATISTICAL-MODEL CODE CASTHY
/13/, CONSIDERING LEVEL FLUCTUATION, USING MODIFIED
WALTER-GUSS POTENTIAL PARAMETERS FOR NEUTRONS. THE
COMPONENTS OF THE DIRECT PROCESS WERE ADDED TO THE LEVELS
OF MT=53, 54, 56, 57, 58, 60 BY USING THE DWUCK CODE /14/.
THE CROSS SECTION TO CONTINUUM WAS CALCULATED WITH THE THE
GNASH CODE /15/ CONSIDERING PRE-EQUILIBRIUM. THE
MODIFICATION MADE FOR JENDL FUSION FILE WAS ALSO ADOPTED
TO JENDL-3.2.
THE LEVEL SCHEME IS GIVEN AS FOLLOWS:
NO. ENERGY(MEV) SPIN-PARITY
G.S 0.0 9/2 +
1. 0.0304 1/2 -
2. 0.6860 3/2 -
3. 0.7440 7/2 +
4. 0.8087 5/2 +
5. 0.8101 3/2 -
6. 0.9499 13/2 +
7. 0.9791 11/2 +
8. 1.0826 9/2 +
9. 1.2900 3/2 -
10. 1.2974 9/2 +
11. 1.3156 5/2 +
12. 1.3351 17/2 +
LEVELS ABOVE 1.34 MEV WERE ASSUMED TO BE OVERLAPPING.
OPTICAL-MODEL PARAMETERS ARE AS FOLLOWS:
V=52.56-0.30*EN, WS=3.233+0.271*EN, VSO=6.004-0.015*EN
VSYM=-16.5 , WI=-0.963+0.153*EN, WSO=0.291-0.018*EN
R0=1.229 , RS=1.282 , RI=1.42, RSO=1.103
A0=0.688 , B=0.512 , AI=0.509, ASO=0.56
THE LEVEL DENSITY PARAMETERS FOR GNASH AND CASTHY
CALCULATIONS ARE AS FOLLOWS:
A EX T DS GAMMA-G
(1/MEV) (MEV) (MEV) (EV) (EV)
NB-94 14.4 4.059 0.719 30.0 0.052
NB-93 13.0 5.884 0.834 - 0.170
NB-92 11.5 3.254 0.790 - 0.170
NB-91 11.0 5.461 0.895 - 0.170
ZR-93 13.7 5.923 0.781 - 0.140
ZR-92 11.9 6.284 0.858 - 0.140
Y-90 11.1 1.441 0.721 1210. 0.130
Y-89 10.7 2.946 0.762 - 0.130
MT=16 (N,2N)
BASED ON THE EXPERIMENTAL DATA/16,17/.
MT=17,22,28,103,104,107 (N,3N),(N,N'A),(N,N'P),(N,P)
(N,D) AND (N,A) CROSS SECTIONS
CALCULATED WITH GNASH/15/.
OPTICAL POTENTIAL PARAMETERS FOR PROTON, ALPHA-PARTICLE
AND DEUTERON WERE TAKEN FROM THE WORKS OF PEREY/18/,
LEMOS/19/ AND LOHR AND HAEVERLI/20/, RESPECTIVELY.
MT=102 RADIATIVE CAPTURE CROSS SECTION
1.0E-5 EV TO 100 KEV: RESONANCE PARAMETERS GIVEN.
100 KEV TO 20 MEV: CALCULATED WITH THE CASTHY CODE/13/.
T-GAMMA=0.0109; DETERMINED SO AS TO REPRODUCE
SIG-C=107MB AT 100 KEV, MEASURED BY REFFO ET AL./21/
MT=251 MU-BAR
CALCULATED FROM FILE-4.
MF=4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
MT=2,51-62
CALCULATED WITH CASTHY FOR EQUILIBRIUM PROCESS. THE
COMPONENTS OF THE DIRECT PROCESS WERE ADDED TO THE LEVELS
OF MT=53,54,56,57,58,60 BY USING THE DWUCK CODE /14/.
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.
MF=12 PHOTON PRODUCTION MULTIPLICITIES
MT=16,17,22,28,52-62,91,103,104,107
CALCULATED WITH GNASH.
MT=102
FROM ENERGY BALANCE.
MF=14 PHOTON ANGULAR DISTRIBUTIONS
MT=16,17,22,28,52-62,91,102,103,104,107
ASSUMED TO BE ISOTROPIC.
MF=15 PHOTON ENERGY DISTRIBUTIONS
MT=16,17,22,28,91,103,104,107
CALCULATED WITH GNASH.
MT=102
CALCULATED WITH CASTHY, REFERRING TO THE COMPILATION OF
GAMMA-RAY SPECTRA FOR THERMAL NEUTRON BY LONE ET AL./22/
PRIMARY TRANSITIONS WERE TAKEN INTO ACCOUNT AT 1.0E-5,
2.53E-2, 1.0E+1, 1.0E+3, 3.0E+4 AND 1.0E+5 EV.
REFERENCES
1) CHIBA, S. ET AL.: JAERI-M 92-027, P.35 (1992).
2) YAMAMURO, N.: JAERI-M 90-006 (1990).
3) KALBACH, C.: PHYS. REV., C37, 2350 (1988).
4) ENSDF: EVALUATED NUCLEAR STRUCTURE DATA FILE, BNL/NNDC.
5) GARG, J.B. ET AL.: PHYS. REV. B137, 547 (1965).
6) POITTEVIN, G.LE. ET AL.: NUCL. PHYS. 70, 497 (1965).
7) ILIESCU, N. ET AL.: NUCL. PHYS. 72, 298 (1965).
8) MACKLIN, R.L.: NUCL. SCI. ENG. 59, 12 (1976).
9) LOPEZ, W.M. ET AL.: NUCL. PHYS. A93, 340 (1967).
10) HASTE, T.J. AND THOMAS B.W.: J. PHYS. G1, 967 (1975).
11) KIKUCHI, Y.: UNPUBLISHED.
12) POENITZ, W.P. AND WHALEN, J.F.: ANL/NDM-80 (1983).
13) IGARASI, S. AND FUKAHORI, T.: JAERI 1321 (1991).
14) KUNZ, P.D.: UNIV. COLORADO (1974).
15) YOUNG, P.G. AND ARTHUR, E.D.: LA-6947 (1977).
16) FREHAUT, J. ET AL.: PROC. SYMP. NEUTRON CROSS-SECTIONS FROM 10
TO 50 MEV, BNL, 1980, P. 399 (1980).
17) VEESER, L.R. ET AL.: PHYS. REV. C16, 1792 (1977).
18) PEREY, F.G.: PHYS. REV. 131, 745 (1963).
19) LEMOS, O.F.: "DIFFUSION ELASTIQUE DE PARTICULES ALPHA DE 21 A
29.6 MEV SUR DES NOYAUX DE LA REGION TI-ZN", ORSAY REPORT,
SERIES A., NO. 136, (1972).
20) LOHR, J.M. AND HAEBERLI, W.: NUCL. PHYS. A232, 381 (1974).
21) REFFO, G. ET AL.: NUCL. SCI. ENG., 80, 630 (1982).
22) LONE, M.A., LEAVITT, R.A. AND HARRISON D.A.: AT. DATA AND
NUCL. DATA TABLES, 26, 511 (1981).