65-Tb-159
65-TB-159 JNDC EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.
DIST-MAR02 REV2-FEB02 20020222
----JENDL-3.3 MATERIAL 6525
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
===========================================================
JENDL-3.2 data were automatically transformed to JENDL-3.3.
Interpolation of spectra: 22 (unit base interpolation)
(3,251) deleted, T-matrix of (4,2) deleted, and others.
===========================================================
HISTORY
84-10 EVALUATION FOR JENDL-2 WAS MADE BY JNDC FPND W.G./1/
90-03 MODIFICATION FOR JENDL-3 WAS MADE/2/.
MF = 1 GENERAL INFORMATION
MT=451 COMMENTS AND DICTIONARY
MF = 2 RESONANCE PARAMETERS
MT=151 RESOLVED AND UNRESOLVED RESONANCE PARAMETERS
RESOLVED RESONANCE PARAMETERS FOR MLBW FORMULA (BELOW 1.188KEV)
RESONANCE PARAMETERS WERE BASED ON JENDL-2 AND TOTAL SPIN J
OF J-UNKNOWN RESONANCES WAS ESTIMATED WITH A RANDOM NUMBER
METHOD.
IN THE JENDL-2 EVALUATION, RESONANCE PARAMETERS WERE MAINLY
TAKEN FROM THE EXPERIMENTAL DATA BY OHKUBO AND KAWARASAKI/3/
AND BY DERRIEN AND ALIX/4/. THE AVERAGE RADIATION WIDTH WAS
ASSUMED TO BE 0.097 EV. A NEGATIVE RESONANCE WAS ADDED AT
-0.1 EV SO AS TO REPRODUCE THE CAPTURE CROSS SECTION OF 25.5
+-1.1 BARNS AND THE ELASTIC SCATTERING OF 20+-2 BARNS AT
0.0253 EV/5/. SCATTERING RADIUS OF 8.3 FM WAS TAKEN FROM THE
RECOMMENDATION BY MUGHABGHAB AND GARBER/5/.
UNRESOLVED RESONANCE REGION : 1.188 KEV - 100 KEV
THE NEUTRON STRENGTH FUNCTIONS, S0, S1 AND S2, WERE BASED ON
THE COMPILATION OF MUGHABGHAB/6/. THE PARAMETERS WERE
ADJUSTED TO REPRODUCE THE CAPTURE CROSS SECTION MEASURED BY
MIZUMOTO ET AL./7,8/ THE EFFECTIVE SCATTERING RADIUS WAS
OBTAINED FROM FITTING TO THE CALCULATED TOTAL CROSS SECTION AT
100 KEV. THE RADIATION WIDTH GG WAS BASED ON THE COMPILATION
OF MUGHABGHAB.
TYPICAL VALUES OF THE PARAMETERS AT 80 KEV:
S0 = 1.207E-4, S1 = 1.480E-4, S2 = 1.090E-4, SG = 537.E-4,
GG = 0.097 EV, R = 7.058 FM.
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)
2200 M/S RES. INTEG.
TOTAL 47.39 -
ELASTIC 20.87 -
CAPTURE 26.52 471
MF = 3 NEUTRON CROSS SECTIONS
BELOW 100 KEV, RESONANCE PARAMETERS WERE GIVEN.
ABOVE 100 KEV, THE SPHERICAL OPTICAL AND STATISTICAL MODEL
CALCULATION WAS PERFORMED WITH CASTHY/9/, BY TAKING ACCOUNT OF
COMPETING REACTIONS, OF WHICH CROSS SECTIONS WERE CALCULATED
WITH PEGASUS/10/ STANDING ON A PREEQUILIBRIUM AND MULTI-STEP
EVAPORATION MODEL. THE OMP'S FOR NEUTRON GIVEN IN TABLE 1 WERE
DETERMINED TO REPRODUCE THE TB-159 TOTAL CROSS SECTION MEASURED
BY FOSTER AND GLASGOW/11/. THE OMP'S FOR CHARGED PARTICLES ARE
AS FOLLOWS:
PROTON = PEREY/12/
ALPHA = HUIZENGA AND IGO/13/
DEUTERON = LOHR AND HAEBERLI/14/
HELIUM-3 AND TRITON = BECCHETTI AND GREENLEES/15/
PARAMETERS FOR THE COMPOSITE LEVEL DENSITY FORMULA OF GILBERT
AND CAMERON/16/ WERE EVALUATED BY IIJIMA ET AL./17/ MORE
EXTENSIVE DETERMINATION AND MODIFICATION WERE MADE IN THE
PRESENT WORK. TABLE 2 SHOWS THE LEVEL DENSITY PARAMETERS USED
IN THE PRESENT CALCULATION. ENERGY DEPENDENCE OF SPIN CUT-OFF
PARAMETER IN THE ENERGY RANGE BELOW E-JOINT IS DUE TO GRUPPELAAR
/18/.
MT = 1 TOTAL
SPHERICAL OPTICAL MODEL CALCULATION WAS ADOPTED.
MT = 2 ELASTIC SCATTERING
CALCULATED AS (TOTAL - SUM OF PARTIAL CROSS SECTIONS).
MT = 4, 51 - 91 INELASTIC SCATTERING
SPHERICAL OPTICAL AND STATISTICAL MODEL CALCULATION WAS
ADOPTED. THE LEVEL SCHEME WAS TAKEN FROM REF./19/.
NO. ENERGY(MEV) SPIN-PARITY
GR. 0.0 3/2 +
1 0.0580 5/2 +
2 0.1375 7/2 +
3 0.2414 9/2 +
4 0.3479 5/2 +
5 0.3626 11/2 +
6 0.3637 5/2 -
7 0.3895 7/2 -
8 0.4290 7/2 +
9 0.4552 9/2 -
10 0.5106 13/2 +
11 0.5340 9/2 +
12 0.5457 11/2 -
13 0.5483 7/2 -
14 0.5809 1/2 +
15 0.6177 3/2 +
16 0.6690 15/2 +
17 0.6743 5/2 +
18 0.6787 9/2 -
19 0.7613 7/2 +
20 0.7780 7/2 +
21 0.8230 11/2 -
22 0.8550 3/2 -
LEVELS ABOVE 0.86 MEV WERE ASSUMED TO BE OVERLAPPING.
MT = 102 CAPTURE
SPHERICAL OPTICAL AND STATISTICAL MODEL CALCULATION WITH
CASTHY WAS ADOPTED. DIRECT AND SEMI-DIRECT CAPTURE CROSS
SECTIONS WERE ESTIMATED ACCORDING TO THE PROCEDURE OF BENZI
AND REFFO/20/ AND NORMALIZED TO 1 MILLI-BARN AT 14 MEV.
THE GAMMA-RAY STRENGTH FUNCTION (3.65E-02) WAS ADJUSTED TO
REPRODUCE THE CAPTURE CROSS SECTION OF 1050 MILLI-BARNS AT 70
KEV MEASURED BY MIZUMOTO ET AL./7,8/ THE RESULTS WERE
MODIFIED BY TAKING ACCOUNT OF THE DATA MEASURED BY BLOCK ET
AL./21/, GIBBONS ET AL./22/ AND POENITZ/23/.
MT = 16 (N,2N) CROSS SECTION
MT = 17 (N,3N) CROSS SECTION
MT = 22 (N,N'A) CROSS SECTION
MT = 28 (N,N'P) CROSS SECTION
MT = 32 (N,N'D) CROSS SECTION
MT = 33 (N,N'T) CROSS SECTION
MT =103 (N,P) CROSS SECTION
MT =104 (N,D) CROSS SECTION
MT =105 (N,T) CROSS SECTION
MT =107 (N,ALPHA) CROSS SECTION
THESE REACTION CROSS SECTIONS WERE CALCULATED WITH THE
PREEQUILIBRIUM AND MULTI-STEP EVAPORATION MODEL CODE PEGASUS.
THE KALBACH'S CONSTANT K (= 177.9) WAS ESTIMATED BY THE
FORMULA DERIVED FROM KIKUCHI-KAWAI'S FORMALISM/24/ AND LEVEL
DENSITY PARAMETERS.
FINALLY, THE (N,2N) (N,P) AND (N,ALPHA) CROSS SECTIONS WERE
NORMALIZED TO THE FOLLOWING VALUES AT 14.5 MEV:
(N,2N) 1860.00 MB (SYSTEMATICS OF WEN DEN LU+/25/)
(N,P) 4.70 MB (RECOMMENDED BY FORREST/26/)
(N,ALPHA) 2.50 MB (RECOMMENDED BY FORREST)
MT = 251 MU-BAR
CALCULATED WITH CASTHY.
MF = 4 ANGULAR DISTRIBUTIONS OF SECONDARY NEUTRONS
LEGENDRE POLYNOMIAL COEFFICIENTS FOR ANGULAR DISTRIBUTIONS ARE
GIVEN IN THE CENTER-OF-MASS SYSTEM FOR MT=2 AND DISCRETE INELAS-
TIC LEVELS, AND IN THE LABORATORY SYSTEM FOR MT=91. THEY WERE
CALCULATED WITH CASTHY. FOR OTHER REACTIONS, ISOTROPIC DISTRI-
BUTIONS IN THE LABORATORY SYSTEM WERE ASSUMED.
MF = 5 ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS
ENERGY DISTRIBUTIONS OF SECONDARY NEUTRONS WERE CALCULATED WITH
PEGASUS FOR INELASTIC SCATTERING TO OVERLAPPING LEVELS AND FOR
OTHER NEUTRON EMITTING REACTIONS.
TABLE 1 NEUTRON OPTICAL POTENTIAL PARAMETERS
DEPTH (MEV) RADIUS(FM) DIFFUSENESS(FM)
---------------------- ------------ ---------------
V = 40.7-0.016E R0 = 7.173 A0 = 0.47
WS = 11.3 RS = 7.249 AS = 0.47
VSO= 7.0 RSO= 7.173 ASO= 0.47
THE FORM OF SURFACE ABSORPTION PART IS DER. WOODS-SAXON TYPE.
TABLE 2 LEVEL DENSITY PARAMETERS
NUCLIDE SYST A(1/MEV) T(MEV) C(1/MEV) EX(MEV) PAIRING
---------------------------------------------------------------
63-EU-155 2.083E+01 5.200E-01 5.190E+00 4.837E+00 9.200E-01
63-EU-156 2.084E+01 4.030E-01 6.286E+00 1.992E+00 0.0
63-EU-157 1.975E+01 5.400E-01 6.628E+00 4.704E+00 7.300E-01
63-EU-158 * 2.207E+01 5.096E-01 4.288E+01 4.059E+00 0.0
64-GD-156 2.254E+01 5.200E-01 1.630E+00 6.286E+00 1.890E+00
64-GD-157 2.278E+01 5.210E-01 1.077E+01 5.454E+00 9.700E-01
64-GD-158 2.155E+01 5.420E-01 2.479E+00 6.260E+00 1.700E+00
64-GD-159 2.308E+01 5.160E-01 1.099E+01 5.433E+00 9.700E-01
65-TB-157 * 2.439E+01 5.121E-01 1.937E+01 5.654E+00 9.200E-01
65-TB-158 * 2.372E+01 5.096E-01 8.443E+01 4.501E+00 0.0
65-TB-159 2.150E+01 5.150E-01 8.937E+00 4.738E+00 7.300E-01
65-TB-160 2.172E+01 4.850E-01 2.558E+01 3.503E+00 0.0
---------------------------------------------------------------
SYST: * = LDP'S WERE DETERMINED FROM SYSTEMATICS.
SPIN CUTOFF PARAMETERS WERE CALCULATED AS 0.146*SQRT(A)*A**(2/3).
IN THE CASTHY CALCULATION, SPIN CUTOFF FACTORS AT 0 MEV WERE
ASSUMED TO BE 10.5 FOR TB-159 AND 5.0 FOR TB-160.
REFERENCES
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AND APPLIED SCIENCE, SANTA FE., VOL. 2, P.1627 (1985).
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(1973).
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