62-Sm-147
62-SM-147 JNDC EVAL-MAR90 JNDC FP NUCLEAR DATA W.G.
DIST-MAR02 REV3-FEB02 20020222
----JENDL-3.3 MATERIAL 6234
-----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/.
93-08 JENDL-3.2 WAS MADE BY JNDC FPND W.G.
***** MODIFIED PARTS FOR JENDL-3.2 ********************
(2,151) UPPER BOUNDARY OF RESOLVED RESONANCE REGION
WAS CHANGED FROM 1.99 KEV TO 1.2 KEV.
***********************************************************
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 1.20 KEV)
RESONANCE PARAMETERS FOR JENDL-2 EVALUATED BY KIKUCHI/3/
WERE REVISED.
FOR JENDL-2, THE DATA OF MIZUMOTO/4/ WERE ADOPTED. THE
J-ASSIGNMENT WAS BASED ON KVITECK AND POPOV/5/, CAUVIN ET
AL./6/ AND KARZHAVINA ET AL./7/ ORBITAL ANGULAR MOMENTUM L
WAS ASSUMED TO BE 0 FOR ALL RESONANCES. AVERAGE RADIATION
WIDTH AND SCATTERING RADIUS WERE TAKEN FROM MUGHABGHAB/8/.
FOR JENDL-3, TOTAL SPIN J OF SOME RESONANCES WAS TENTATIVELY
ESTIMATED WITH A RANDOM NUMBER METHOD. PARAMETERS OF A NEGA-
TIVE RESONANCE WERE MODIFIED SO AS TO REPRODUCE THE THERMAL
CAPTURE CROSS SECTION GIVEN BY MUGHABGHAB.
UNRESOLVED RESONANCE REGION : 1.2 KEV - 100 KEV
THE NEUTRON STRENGTH FUNCTION S0 WAS BASED ON THE COMPILATION
OF MUGHABGHAB/8/, AND S1 AND S2 WERE CALCULATED WITH OPTICAL
MODEL CODE CASTHY/9/. 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 COMPILATION OF
MUGHABGHAB.
TYPICAL VALUES OF THE PARAMETERS AT 70 KEV:
S0 = 4.800E-4, S1 = 1.000E-4, S2 = 4.700E-4, SG =120.E-4,
GG = 0.069 EV, R = 6.640 FM.
CALCULATED 2200-M/S CROSS SECTIONS AND RES. INTEGRALS (BARNS)
2200 M/S RES. INTEG.
TOTAL 59.07 -
ELASTIC 1.057 -
CAPTURE 58.01 781
(N,ALPHA) 5.783E-04
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/10/ 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/11/, KELLIE ET AL./12/ AND SO
ON, AND THE S-WAVE NEUTRON STRENGTH FUNCTION OF (4.8+-0.5)E-4
/8/. 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
GR. 0.0 7/2 -
1 0.1213 5/2 -
2 0.1974 3/2 -
3 0.7130 11/2 -
4 0.7988 3/2 -
5 0.8080 13/2 +
6 0.9250 11/2 +
7 1.0070 1/2 -
8 1.0290 11/2 +
9 1.0540 5/2 +
10 1.0650 5/2 +
11 1.0770 5/2 -
12 1.1030 9/2 -
13 1.1660 11/2 -
14 1.1800 7/2 -
LEVELS ABOVE 1.2 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/21/ AND NORMALIZED TO 1 MILLI-BARN AT 14 MEV.
THE GAMMA-RAY STRENGTH FUNCTION (98.4E-4) WAS ADJUSTED TO
REPRODUCE THE CAPTURE CROSS SECTION OF 650 MILLI-BARNS AT 50
KEV MEASURED BY MACKLIN/22/.
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 ASSUMED TO BE THE SAME
AS THAT OF SM-148.
FINALLY, THE (N,P) AND (N,ALPHA) CROSS SECTIONS WERE
NORMALIZED TO THE FOLLOWING VALUES AT 14.5 MEV:
(N,P) 13.60 MB (SYSTEMATICS OF FORREST/23/)
(N,ALPHA) 4.87 MB (SYSTEMATICS OF FORREST)
THE (N,ALPHA) CROSS SECTION BELOW 1.99 KEV WAS CALCULATED FROM
RESONANCE PARAMETERS, BY ASSUMING A MEAN ALPHA WIDTH OF
6.80E-7 EV SO AS TO REPRODUCE THE THERMAL CROSS SECTION/8/.
THE CROSS SECTION WAS AVERAGED IN SUITABLE ENERGY INTERVALS.
ABOVE 1.99 KEV, THE CROSS SECTION WAS CONNECTED SMOOTHLY TO
THE PEGASUS CALCULATION.
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 FROM OVERLAPPING LEVELS AND FOR
OTHER NEUTRON EMITTING REACTIONS.
TABLE 1 NEUTRON OPTICAL POTENTIAL PARAMETERS
DEPTH (MEV) RADIUS(FM) DIFFUSENESS(FM)
---------------------- ------------ ---------------
V = 43.42-0.1879E R0 = 7.151 A0 = 0.6
WS = 9.875-0.0019E RS = 7.04 AS = 0.45
VSO= 7.0 RSO= 7.151 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-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
60-ND-146 2.019E+01 5.660E-01 1.121E+00 6.714E+00 2.100E+00
61-PM-144 1.831E+01 5.100E-01 1.011E+01 3.040E+00 0.0
61-PM-145 * 1.769E+01 5.411E-01 2.780E+00 4.120E+00 7.600E-01
61-PM-146 * 1.942E+01 5.387E-01 2.241E+01 3.849E+00 0.0
61-PM-147 2.192E+01 4.913E-01 4.801E+00 4.589E+00 9.200E-01
62-SM-145 2.045E+01 4.343E-01 5.095E-01 3.596E+00 1.220E+00
62-SM-146 1.871E+01 5.117E-01 2.497E-01 5.159E+00 1.980E+00
62-SM-147 2.275E+01 4.770E-01 2.660E+00 4.823E+00 1.220E+00
62-SM-148 2.097E+01 5.505E-01 1.055E+00 6.694E+00 2.140E+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 9.964 FOR SM-147 AND 5.943 FOR SM-148.
REFERENCES
1) AOKI, T. ET AL.: PROC. INT. CONF. ON NUCLEAR DATA FOR BASIC
AND APPLIED SCIENCE, SANTA FE., VOL. 2, P.1627 (1985).
2) KAWAI, M. ET AL.: J. NUCL. SCI. TECHNOL., 29, 195 (1992).
3) KIKUCHI, Y. ET AL.: JAERI-M 86-030 (1986).
4) MIZUMOTO, M.: NUCL. PHYS., A357, 90 (1981).
5) KVITECK, J., POPOV, JU.P.: NUCL. PHYS., A154, 177 (1970).
6) CAUVIN, B., ET AL.: "PROC. 3RD CONF ON NEUTRON CROSS SECTIONS
AND TECHNOL., KNOXVILLE 1971", 785.
7) KARZHAVINA, E.N., ET AL.: JINR-P3-6237 (1972).
8) MUGHABGHAB, S.F.: "NEUTRON CROSS SECTIONS, VOL. I, PART B",
ACADEMIC PRESS (1984).
9) IGARASI, S. AND FUKAHORI, T.: JAERI 1321 (1991).
10) IIJIMA, S. ET AL.: JAERI-M 87-025, P. 337 (1987).
11) FOSTER, D.G. JR. AND GLASGOW, D.W.: PHYS. REV., C3, 576
(1971).
12) KELLIE, J.D., HALL, S.J. AND CRAWFORD, G.I. ET AL.:
J. PHYS., A7, 1758 (1974).
13) PEREY, F.G: PHYS. REV. 131, 745 (1963).
14) HUIZENGA, J.R. AND IGO, G.: NUCL. PHYS. 29, 462 (1962).
15) LOHR, J.M. AND HAEBERLI, W.: NUCL. PHYS. A232, 381 (1974).
16) 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).
17) GILBERT, A. AND CAMERON, A.G.W.: CAN. J. PHYS., 43, 1446
(1965).
18) IIJIMA, S., ET AL.: J. NUCL. SCI. TECHNOL. 21, 10 (1984).
19) GRUPPELAAR, H.: ECN-13 (1977).
20) LEDERER, C.M., ET AL.: "TABLE OF ISOTOPES, 7TH ED.", WILEY-
INTERSCIENCE PUBLICATION (1978).
21) BENZI, V. AND REFFO, G.: CCDN-NW/10 (1969).
22) MACKLIN, R.: TAKEN FROM EXFOR 12966 (1986).
23) FORREST, R.A.: AERE-R 12419 (1986).