60-Nd-144
60-ND-144 JNDC EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.
DIST-SEP90 REV2-OCT93
----JENDL-3.2 MATERIAL 6031
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
84-10 EVALUATION FOR JENDL-2 WAS MADE BY JNDC FPND W.G./1/
90-03 MODIFICATION FOR JENDL-3 WAS MADE/2/.
93-10 JENDL-3.2 WAS MADE BY JNDC FPND W.G.
***** MODIFIED PARTS FOR JENDL-3.2 ********************
(2,151) RESOLVED RESONANCE PARAMETERS
***********************************************************
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 12 KEV)
RESONANCE PARAMETERS ADOPTED IN JENDL-3.1 WERE TAKEN FROM
JENDL-2/3/: RESONANCE ENERGIES WERE TAKEN FROM TELLIER/4/
AND MUSGROVE ET AL./5/ BY ADJUSTING TO THOSE OF REF./4/.
NEUTRON WIDTHS WERE TAKEN FROM REF./4/, AND RADIATION WIDTHS
WERE DEDUCED FROM THE CAPTURE AREAS OF MUSGROVE ET AL. FOR
THE RESONANCES NOT MEASURED BY TELLIER, NEUTRON WIDTHS WERE
ESTIMATED FROM THE CAPTURE AREAS BY ASSUMING THE AVERAGE
RADIATION WIDTHS OF 0.047 EV FOR S-WAVE RESONANCES AND OF
0.041 EV FOR P-WAVE ONES. FOR THE LOWEST 2 LEVELS, THE
CAPTURE WIDTHS OF KARZHAVINA ET AL./6/ WERE ADOPTED. A
NEGATIVE RESONANCE WAS ADDED AT -76 EV SO AS TO REPRODUCE THE
CAPTURE CROSS SECTION OF 3.8+-0.3 BARNS AT 0.0253 EV /7/.
FOR JENDL-3.2, THE CAPTURE DATA MEASURED AT ORELA OF ORNL
WERE RENORMALIZED (FACTOR = 0.967)/8/. THE NEUTRON WIDTH
AND/OR THE RADIATION WIDTH WAS REVISED TO REPRODUCE THE
RENORMALIZED CAPTURE AREA FOR EACH RESONANCE ABOVE 2.6 KEV.
EFFECTIVE SCATTERING RADIUS RECOMMENDED IN REF./9/ WAS
ADOPTED AND PARAMETERS OF THE NAGATIVE LEVEL WERE ADJUSTED TO
THERMAL CROSS SECTIONS/9/.
UNRESOLVED RESONANCE REGION : 12 KEV - 100 KEV
UNRESOLVED RESONANCE PARAMETERS WERE ADOPTED FROM JENDL-2.
THE NEUTRON STRENGTH FUNCTIONS, S0, S1 AND S2 WERE CALCULATED
WITH OPTICAL MODEL CODE CASTHY/10/. THE OBSERVED LEVEL
SPACING WAS DETERMINED TO REPRODUCE THE CAPTURE CROSS SECTION
CALCULATED WITH CASTHY. THE EFFECTIVE SCATTERING RADIUS WAS
OBTAINED FROM FITTING TO THE CALCULATED TOTAL CROSS SECTION AT
100 KEV.
TYPICAL VALUES OF THE PARAMETERS AT 70 KEV:
S0 = 2.928E-4, S1 = 0.688E-4, S2 = 3.543E-4, SG = 0.998E-4,
GG = 0.041 EV, R = 7.660 FM.
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)
2200 M/S RES. INTEG.
TOTAL 4.6036 -
ELASTIC 1.0007 -
CAPTURE 3.6030 4.30
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, BY TAKING ACCOUNT OF
COMPETING REACTIONS, OF WHICH CROSS SECTIONS WERE CALCULATED
WITH PEGASUS/11/ STANDING ON A PREEQUILIBRIUM AND MULTI-STEP
EVAPORATION MODEL. THE OMP'S FOR NEUTRON GIVEN IN TABLE 1 WERE
DETERMINED BY IIJIMA AND KAWAI/12/ TO REPRODUCE A SYSTEMATIC
TREND OF THE TOTAL CROSS SECTION. THE OMP'S FOR CHARGED
PARTICLES ARE AS FOLLOWS:
PROTON = PEREY/13/
ALPHA = HUIZENGA AND IGO/14/
DEUTERON = LOHR AND HAEBERLI/15/
HELIUM-3 AND TRITON = BECCHETTI AND GREENLEES/16/
PARAMETERS FOR THE COMPOSITE LEVEL DENSITY FORMULA OF GILBERT
AND CAMERON/17/ WERE EVALUATED BY IIJIMA ET AL./18/ 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
/19/.
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./20/.
NO. ENERGY(MEV) SPIN-PARITY DWBA CAL.
GR. 0.0 0 +
1 0.6965 2 + *
2 1.3147 4 +
3 1.5106 3 - *
4 1.5610 2 +
5 1.7913 6 +
LEVELS ABOVE 1.817 MEV WERE ASSUMED TO BE OVERLAPPING.
FOR THE LEVELS WITH AN ASTERISK, THE CONTRIBUTION OF DIRECT
INELASTIC SCATTERING CROSS SECTIONS WAS CALCULATED BY THE
DWUCK-4 CODE/21/. DEFORMATION PARAMETER (BETA2 = 0.1309) WAS
BASED ON THE DATA COMPILED BY RAMAN ET AL./22/ AND BETA3 =
0.143 WAS PRESENTLY DETERMINED.
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/23/ AND NORMALIZED TO 1 MILLI-BARN AT 14 MEV.
THE GAMMA-RAY STRENGTH FUNCTION (9.12E-05) WAS ADJUSTED TO
REPRODUCE THE CAPTURE CROSS SECTION OF 70 MILLI-BARNS AT 30
KEV MEASURED BY MUSGROVE ET AL./24/ AND BY KONONOV ET AL.
/25/
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 =106 (N,HE3) 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 (= 25.0) WAS DETERMINED TO REPRODUCE
ENERGY DEPENDENCE OF THE (N,2N) CROSS SECTION MEASURED BY
FREHAUT ET AL./26/.
FINALLY, THE (N,P) AND (N,ALPHA) CROSS SECTIONS WERE
NORMALIZED TO THE FOLLOWING VALUES AT 14.5 MEV:
(N,P) 12.00 MB (RECOMMENDED BY FORREST/27/)
(N,ALPHA) 5.40 MB (AVERAGE OF DATA MEASURED BY
GMUCA+/28/ AND QAIM/29/.
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. CONTRIBUTION OF DIRECT INELASTIC
SCATTERING WAS CALCULATED WITH DWUCK-4. FOR OTHER REACTIONS,
ISOTROPIC DISTRIBUTIONS 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 = 47.94 R0 = 6.718 A0 = 0.6
WS = 9.13 RS = 7.564 AS = 0.45
VSO= 7.0 RSO= 6.771 ASO= 0.6
THE FORM OF SURFACE ABSORPTION PART IS DER. WOODS-SAXON TYPE.
TABLE 2 LEVEL DENSITY PARAMETERS
NUCLIDE A(1/MEV) T(MEV) C(1/MEV) EX(MEV) PAIRING
---------------------------------------------------------------
58-CE-140 1.413E+01 6.541E-01 3.376E-01 5.852E+00 2.020E+00
58-CE-141 1.714E+01 5.150E-01 7.134E-01 3.957E+00 1.170E+00
58-CE-142 1.600E+01 6.000E-01 4.210E-01 5.674E+00 1.930E+00
58-CE-143 1.900E+01 5.500E-01 2.613E+00 5.094E+00 1.170E+00
59-PR-141 1.400E+01 6.500E-01 1.810E+00 4.559E+00 8.500E-01
59-PR-142 1.595E+01 6.150E-01 1.201E+01 3.974E+00 0.0
59-PR-143 1.500E+01 6.280E-01 2.607E+00 4.558E+00 7.600E-01
59-PR-144 1.600E+01 6.000E-01 1.045E+01 3.744E+00 0.0
60-ND-142 1.288E+01 6.710E-01 2.250E-01 5.526E+00 2.030E+00
60-ND-143 1.826E+01 4.710E-01 5.220E-01 3.613E+00 1.180E+00
60-ND-144 1.771E+01 5.640E-01 4.792E-01 5.691E+00 1.940E+00
60-ND-145 2.054E+01 5.120E-01 2.465E+00 4.869E+00 1.180E+00
---------------------------------------------------------------
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 8.725 FOR ND-144 AND 6.875 FOR ND-145.
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