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75-Re-187 ORNL,LANL EVAL-MAR90 L.W.WESTON AND P.G.YOUNG
DIST-JAN09 20090105
----JEFF-311 MATERIAL 7531
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
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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 ENDF EVAL 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----REACTION BRANCHING RATIOS---------------------
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=1,MT=457----RADIOACTIVE DECAY DATA------------------------
PREPARED FOR FILE 1/74 C.W.REICH (ANC) REF. Q- 1973 REVISION OF
WAPSTRA-GOVE MASS TABLE. HALF-LIFE- N.E. HOLDEN, CHART NUCLIDES
AND PRIV. COM.(JAN.,1974). OTHER- W.B. EWBANK, NUCLEAR DATA B 1,
NO.2, 23 (1966). NOTE FIRST-FORBIDDEN, UNIQUE SHAPE CORRECTION
CONSIDERED IN DERIVING E-BETA FOR GROUND-STATE BETA TRANSITION.
----MF=2,MT=151----RESONANCE PARAMETERS--------------------------
RESOLVED RESONANCE PARAMETERS ARE DIRECTLY FROM EVALUATION OF
S.F.MUGHABGHAB, REF(3). RESOLVED RANGE FROM 10-5 TO 2000 EV.
CALCULATED AT 0.0253 EV: TOTAL CROSS SECTION= 86.6 BARNS
CAPTURE CROSS SECTION= 76.7 BARNS
SEE NOTE IN MF=3 CONCERNING SCATTERING RADIUS
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 CAPTURE DATA ON NATURAL RHENIUM BY R.L.MACKLIN AND
P.G.YOUNG,REF(4), WITH CODE FITACS, BY F.H. FROEHNER, REF(5)..
ISOTOPIC SEPARATION WAS WITH AVERAGE RESONANCE PARAMETERS
DETERMINED FROM PREVIOUS RESOLVED AND UNRESOLVED DATA.
ABOVE 125 KEV THE MODEL CODE CALCULATIONS OF P.G.YOUNG, REF(4),
WERE USED FOR SMOOTH CROSS SECTIONS. A LOWER SCATTERING RADIUS
(7.9 FM) AND P-WAVE STRENGTH FUNCTION (.28) 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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