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75-Re-185 ORNL,LANL EVAL-MAR90 L.W.WESTON AND P.G.YOUNG
DIST-JAN09 20090105
----JEFF-311 MATERIAL 7525
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
*************************** JEFF-3.1.1 *************************
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** Original data taken from: JEFF-3.1 **
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***************************** JEFF-3.1 *************************
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** Original data taken from: JEFF-3.0 **
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***************************** JEFF-3.0 ***********************
DATA TAKEN FROM :- ENDF/B-VI rel.4 (DIST-JUN90)
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PREVIOUS VERSION BY W.B.HENDERSON AND J. W. ZWICK,GE-NMPO,1/68
FILES 2,3 AND 33 WERE REVISED FOR VERSION VI.
----MF=1,MT=453----RADIOACTIVE DECAY DATA------------------------
DECAY CONSTANTS FROM HALF LIVES OF GROUND STATE(1). DAUGHTERS
FROM REF(1) EXCEPT OS-186 IS MADE DAUGHTER OF RE-186 LACKING
BRANCHING RATIO SPEC,SINCE 95 PERCENT OF DECAYS GO THAT WAY(2).
----MF=2,MT=151----RESONANCE PARAMETERS--------------------------
THE RESOLVED RESONANCE PARAMETERS WERE TAKEN DIRECTLY FROM THE
EVALUATION OF MUGHABGHAB, REF(3). THE RESOLVED RESONANCE REGION
EXTENDS FROM 10-5 TO 2000 EV.
CALCULATED AT 0.0253 EV: TOTAL CROSS SECTION= 121.0 BARNS
CAPTURE CROSS SECTION= 112.2 BARNS
SEE NOTE IN MF=3 REGARDING SCATTERING RADIUS.
THE UNRESOLVED RESONANCE PARAMETERS WERE DERIVED PRIMARILY FROM
THE RESOLVED RESONANCE PARAMETERS (REF. 3) WITH SOME INPUT FROM
THE FIT TO THE MF=3 SMOOTH CROSS SECTIONS. UNRESOLVED RESONANCE
PARAMETERS ARE TO BE USED ONLY FOR CALCULATING SELF SHIELDING
FACTORS. UNRESOLVED RESONANCE PARAMETERS EXTEND FROM 2 TO 35 KEV
----MF=3---------SMOOTH CROSS SECTIONS---------------------------
THE SMOOTH CROSS SECTIONS FROM 2 TO 125 KEV WERE DERIVED FROM A
FIT TO THE DATA OF R.L.MACKLIN AND P.G.YOUNG, REF(4), ON NATURAL
RHENIUM USING THE CODE FITACS BY F.H. FROEHNER, REF(5).. THE
ISOTOPIC SEPARATION WAS DONE WITH AVERAGE RESONANCE PARAMETERS
DERIVED FROM PREVIOUS RESOLVED AND UNRESOLVED DATA. CAPTURE FROM
THIS FIT EXTENDS TO 400 KEV. ABOVE 125 KEV THE MODEL CODE
CALCULATIONS OF P.G.YOUNG, REF(4), WERE USED FOR THE SMOOTH CROSS
SECTIONS. A LOWER SCATTERING RADIUS (7.9 FM) AND P-WAVE STRENGTH
FUNCTION (.40) THAN EVALUATED IN REF. 3 WAS NECESSARY TO FIT DATA
ABOVE 2 KEV. SEE REF. 4 FOR COMPARISON WITH EXPERIMENTAL DATA.
----MF=3,MT=251,252,AND 253----ELASTIC MUBAR,XI,AND GAMMA--------
COMPUTED BY CHAD(6) FROM A-N(11) DIFFERENTIAL ELASTIC SIGMAS.
----MF=4,MT=2----ELASTIC SECONDARY ANGULAR DISTRIBUTIONS---------
TRANS.MATRIX AND LEGENDRE COEF.COMPUTED BY CHAD AS ABOVE.
---MF=5,MT=4,16,AND 17-SECONDARY ENERGY DISTRIBUTIONS------------
DISCRETE LEVEL AND CONTINUUM(N,GAMMA,NPRIME) TO 1.5MEV FROM
A-N(11). ABOVE 1.5MEV,ALL TREATED AS CONTINUUM. EACH CONTINUUM IS
SPECIFIED MAXWELLIAN,T=SQRT(E/A),A=25MEV-1.
---------------------------REFERENCES----------------------------
1. D.GOLDMAN,J.ROESSER,CHART OF THE NUCLIDES,9TH ED.,KAPL 11/66
2. NUCLEAR DATA,SECT.B,VOL.1,NO.2,ACADEMIC PRESS,JUNE 1966
3. S.F.MUGHABGHAB,"NEUTRON CROSS SECTIONS,VOL.1, NEUTRON
RESONANCE PARAMETERS AND THERMAL CROSS SECTIONS,PART B",
BNLNDC,1984.
4. R.L.MACKLIN AND P.G.YOUNG, NUCL. SCI. ENG. 97,239,1987.
5. F.H. FROEHNER, KERNFORSCHUNGSZENTRUM KARLSRUHE, PRIVATE
COMMUNICATION, 1986.
6. R.BERLAND,NAA-SR-11231,DEC.31,1965.BNWL VERSION,MOD.BY GE-NMPO
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