62-Sm-144
62-SM-144 JNDC EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.
DIST-SEP90 REV2-NOV93
----JENDL-3.2 MATERIAL 6225
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
90-03 NEW EVALUATION FOR JENDL-3 WAS COMPLETED BY JNDC FPND
W.G./1/
93-11 JENDL-3.2 WAS MADE BY JNDC FPND W.G.
***** MODIFIED PARTS FOR JENDL-3.2 ********************
(2,151) RESOLVED RESONANCE PARAMETERS BASED ON A
RECENT EXPERIMENTAL REPORT.
(3,1), (3,2), (3,4), (3,51-91), (3,102)
RENORMALIZATION OF CAPTURE AND RECALCU-
LATION OF DIRECT INELASTIC PROCESS.
(4,51-91)
***********************************************************
MF = 1 GENERAL INFORMATION
MT=451 COMMENTS AND DICTIONARY
MF = 2 RESONANCE PARAMETERS
MT=151 RESOLVED AND UNRESOLVED RESONANCE PARAMETERS
THE RESOLVED RESONANCE PARAMETERS WERE EVALUATED ON THE BASIS
OF THE DATA RECENTLY MEASURED BY MACKLIN ET AL./2/ FOR RESO-
NANCES WHOSE NEUTRON WIDTH WAS NOT MEASURED, THE NEUTRON WIDTH
WAS OBTAINED FROM THE CAPTURE AREA ASSUMING THE RADIATION
WIDTH OF 0.074 EV AND 0.089 EV FOR THE S-WAVE AND P-WAVE RESO-
NANCES, RESPECTIVELY. FOR P-WAVE RESONANCES, THE VALUE OF THE
TOTAL SPIN J WAS ARBITRARILY ASSIGNED WITH THE RATIO 1:2 IN
THE NUMBER OF THE RESONANCES WITH J=1/2 AND J=3/2. TO REPRO-
DUCE THE THERMAL CROSS SECTION OF 1.64+-0.10 B AT 0.0253
EV/3/, A NEGATIVE RESONANCE WAS ADDED AT 104 EV. THE EFFEC-
TIVE SCATTERING RADIUS WAS EMPLOYED FROM THE MEASURED DATA BY
MACKLIN ET AL./2/
UNRESOLVED RESONANCE REGION : 30 EV - 100 KEV
THE NEUTRON STRENGTH FUNCTION S0 WAS BASED ON THE COMPILATION
OF MUGHABGHAB/4/, AND S1 AND S2 WERE CALCULATED WITH OPTICAL
MODEL CODE CASTHY/5/. 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.
THE RADIATION WIDTH GG WAS BASED ON THE SYSTEMATICS OF
MEASURED VALUES FOR NEIGHBORING NUCLIDES.
TYPICAL VALUES OF THE PARAMETERS AT 70 KEV:
S0 = 3.200E-4, S1 = 1.900E-4, S2 = 2.000E-4, SG = 1.27E-4,
GG = 0.060 EV, R = 5.748 FM.
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)
2200 M/S RES. INTEG.
TOTAL 2.3992 -
ELASTIC 0.7588 -
CAPTURE 1.6404 1.91
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/6/ STANDING ON A PREEQUILIBRIUM AND MULTI-STEP
EVAPORATION MODEL. THE OMP'S FOR NEUTRON GIVEN IN TABLE 1 WERE
DETERMINED TO REPRODUCE THE TOTAL CROSS SECTIONS OF NATURAL SM
MEASURED BY FOSTER AND GLASGOW/7/, KELLIE ET AL./8/ AND SO
ON. THE OMP'S FOR CHARGED PARTICLES ARE AS FOLLOWS:
PROTON = PEREY/9/
ALPHA = HUIZENGA AND IGO/10/
DEUTERON = LOHR AND HAEBERLI/11/
HELIUM-3 AND TRITON = BECCHETTI AND GREENLEES/12/
PARAMETERS FOR THE COMPOSITE LEVEL DENSITY FORMULA OF GILBERT
AND CAMERON/13/ WERE EVALUATED BY IIJIMA ET AL./14/ 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
/15/.
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 BASED ON EVALUATED NUCLEAR
STRUCTURE DATA FILE (1987 VERSION)/16/ AND NUCLEAR DATA
SHEETS/17/.
NO. ENERGY(MEV) SPIN-PARITY DWUCK CAL
GR. 0.0 0 +
1 1.6602 2 + *
2 1.8101 3 - *
3 2.1906 4 +
4 2.3232 6 +
5 2.4233 2 +
6 2.4779 0 +
7 2.5880 4 +
8 2.8000 2 +
9 2.8840 4 +
10 3.0210 4 +
11 3.1238 7 -
12 3.1980 4 -
13 3.2280 3 -
14 3.2550 1 -
15 3.3080 6 +
16 3.3100 6 +
17 3.3620 4 -
18 3.3761 8 +
19 3.3930 3 -
20 3.4050 3 -
21 3.4605 9 -
22 3.5300 3 -
23 3.6501 8 +
24 3.6710 5 -
25 3.7340 3 -
26 3.8490 4 -
27 3.8530 9 -
28 3.8591 8 +
29 3.8690 5 -
LEVELS ABOVE 3.869 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/18/. DEFORMATION PARAMETERS (BETA2 = 0.088 AND
BETA3 = 0.135) WERE BASED ON THE DATA COMPILED BY RAMAN ET
AL./19/ AND SPEAR/20/, RESPECTIVELY.
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/21/ AND NORMALIZED TO 1 MILLI-BARN AT 14 MEV.
THE GAMMA-RAY STRENGTH FUNCTION (1.128E-4) WAS ADJUSTED TO
REPRODUCE THE CAPTURE CROSS SECTION OF 57 MILLI-BARNS AT 90
KEV MEASURED BY MACKLIN ET AL./2/
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 =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
MT =111 (N,2P) CROSS SECTION
THESE REACTION CROSS SECTIONS WERE CALCULATED WITH THE
PREEQUILIBRIUM AND MULTI-STEP EVAPORATION MODEL CODE PEGASUS.
THE KALBACH'S CONSTANT K (= 158.4) WAS ESTIMATED BY THE
FORMULA DERIVED FROM KIKUCHI-KAWAI'S FORMALISM/22/ AND LEVEL
DENSITY PARAMETERS.
FINALLY, THE (N,P) AND (N,ALPHA) CROSS SECTIONS WERE
NORMALIZED TO THE FOLLOWING VALUES AT 14.5 MEV:
(N,P) 24.00 MB (RECOMMENDED BY FORREST/23/)
(N,ALPHA) 10.20 MB (SYSTEMATICS OF FORREST/23/)
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 FROM OVERLAPPING LEVELS AND FOR
OTHER NEUTRON EMITTING REACTIONS.
TABLE 1 NEUTRON OPTICAL POTENTIAL PARAMETERS
DEPTH (MEV) RADIUS(FM) DIFFUSENESS(FM)
---------------------- ------------ ---------------
V = 46.96-0.0172E R0 = 6.237 A0 = 0.655
WS = 8.455 RS = 7.548 AS = 0.448
VSO= 7.0 RSO= 6.709 ASO= 0.6
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
---------------------------------------------------------------
60-ND-140 * 1.641E+01 5.532E-01 2.596E-01 5.024E+00 1.880E+00
60-ND-141 1.477E+01 6.091E-01 9.537E-01 4.587E+00 1.180E+00
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
61-PM-141 * 1.653E+01 5.508E-01 2.224E+00 3.845E+00 7.000E-01
61-PM-142 * 1.619E+01 5.484E-01 6.721E+00 2.997E+00 0.0
61-PM-143 * 1.430E+01 5.459E-01 6.683E-01 3.187E+00 8.500E-01
61-PM-144 1.831E+01 5.100E-01 1.011E+01 3.040E+00 0.0
62-SM-142 * 1.665E+01 5.484E-01 2.438E-01 5.066E+00 1.920E+00
62-SM-143 1.628E+01 5.431E-01 6.981E-01 4.167E+00 1.220E+00
62-SM-144 1.557E+01 5.543E-01 1.323E-01 4.951E+00 2.070E+00
62-SM-145 2.045E+01 4.343E-01 5.095E-01 3.596E+00 1.220E+00
---------------------------------------------------------------
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 15.12 FOR SM-144 AND 5.0 FOR SM-145.
REFERENCES
1) KAWAI, M. ET AL.: J. NUCL. SCI. TECHNOL., 29, 195 (1992).
2) MACKLIN, R.L. ET AL.: PHYS. REV., C48, 1120 (1993).
3) ALEXANDER, C.W. ET AL.: NUCL. SCI. ENG., 95, 194 (1987).
4) MUGHABGHAB, S.F.: "NEUTRON CROSS SECTIONS, VOL. I, PART B",
ACADEMIC PRESS (1984).
5) IGARASI, S. AND FUKAFORI, T.: JAERI 1321 (1991).
6) IIJIMA, S. ET AL.: JAERI-M 87-025, P. 337 (1987).
7) FOSTER, D.G. JR. AND GLASGOW, D.W.: PHYS. REV., C3, 576
(1971).
8) KELLIE, J.D., HALL, S.J. AND CRAWFORD, G.I. ET AL.:
J. PHYS., A7, 1758 (1974).
9) PEREY, F.G: PHYS. REV. 131, 745 (1963).
10) HUIZENGA, J.R. AND IGO, G.: NUCL. PHYS. 29, 462 (1962).
11) LOHR, J.M. AND HAEBERLI, W.: NUCL. PHYS. A232, 381 (1974).
12) BECCHETTI, F.D., JR. AND GREENLEES, G.W.: POLARIZATION
PHENOMENA IN NUCLEAR REACTIONS ((EDS) H.H. BARSHALL AND
W. HAEBERLI), P. 682, THE UNIVERSITY OF WISCONSIN PRESS.
(1971).
13) GILBERT, A. AND CAMERON, A.G.W.: CAN. J. PHYS., 43, 1446
(1965).
14) IIJIMA, S., ET AL.: J. NUCL. SCI. TECHNOL. 21, 10 (1984).
15) GRUPPELAAR, H.: ECN-13 (1977).
16) ENSDF: EVALUATED NUCLEAR STRUCTURE DATA FILE (JUNE 1987).
17) NUCLEAR DATA SHEETS, 27, 97 (1979).
18) KUNZ, P.D.: PRIVATE COMMUNICATION.
19) RAMAN, S., ET AL.: ATOM. DATA AND NUCL. DATA TABLES 36, 1
(1987)
20) SPEAR, R.H.: ATOM. DATA AND NUCL. DATA TABLE, 42, 55 (1989).
21) BENZI, V. AND REFFO, G.: CCDN-NW/10 (1969).
22) KIKUCHI, K. AND KAWAI, M.: "NUCLEAR MATTER AND NUCLEAR
REACTIONS", NORTH HOLLAND (1968).
23) FORREST, R.A.: AERE-R 12419 (1986).