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90-Th-230 NEA RCOM-JUN82 SCIENTIFIC CO-ORDINATION GROUP
DIST-JAN09 20090105
----JEFF-311 MATERIAL 9034
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
*************************** JEFF-3.1.1 *************************
** **
** Original data taken from: JEFF-3.1 **
** **
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***************************** JEFF-3.1 *************************
** **
** Original data taken from: JEFF-3.0 **
** **
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***************************** JEFF-3.0 ***********************
DATA TAKEN FROM :- JEF-2.2 (DIST-JAN92)
Components of the energy released by fission (MT=458)
updated by O. Serot et al. (JEF/DOC-887).
Fission Q updated consistently.
******************************************************************
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* JEF-2 *
* DATA WERE TAKEN FROM ENDF/B-V(MAT=8030). *
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* 17-DEC-84: RADIOACTIVE DECAY DATA DELETED.
* 26-DEC-84: Q-VALUE FOR MT=102 CORRECTED
* 3-JAN-85: RESONANCE PARAM. CHANGED TO ORIGINAL SINGLE-LEVEL.
* 31-MAR-88: CHANGE OF THE FLAG FROM SINGLE LEVEL TO MULTI LEVEL
* BREIT-WIGNER RESONANCE PARAMETERS
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HEDL EVAL-NOV77 MANN
DIST-DEC78 790307
MF=1
MT=452 NU. SYSTEMATICS. (REF. 5)
MT=458 ENERGY OF FISSION. SYSTEMATICS OF SHER (REF. 6)
MF=2
MT=151 RESONANCE PARAMETERS. RESOLVED PARAMETERS FROM BNL-325
(REF. 1), EXCEPT NEGATIVE ENERGY RESONANCE INCLUDED TO OBTAIN
THERMAL CAPTURE CROSS SECTION (23.1 B VERUS 23.2 +-0.6 B IN
BNL-325) AND THE NEUTRON WIDTH WAS REDUCED FOR THE FIRST
RESONANCE TO OBTAIN BETTER AGREEMENT WITH CAPTURE RESONANCE
INTEGRAL (1690 B VERUS 1010 B IN BNL-325).
MF=3
MT=1 TOTAL. FROM OPTICAL MODEL
MT=2 ELASTIC. DIFFERENCE OF TOTAL AND PARTIAL CROSS SECTIONS
MT=4 INELASTIC. SUM OF 51,...,67,91.
MT=16 (N,2N)
MT=18 FISSION. BASED ON MUIR AND VESSER (REF. 2), LASL BOMB
DATA. LOW ENERGY (.LT. 300 KEV) AND HIGH ENERGY (.GT. 3 MEV)
FROM STATISTICAL MODEL CALCULATIONS (REF. 3). NOTE THAT DATA
FROM LYNN ET AL (REF. 4) IS TWICE AS LARGE AS MUIR AND VESSER
ABOVE 1.2 MEV ALTHOUGH ARE IN GOOD AGREEMENT BELOW.
MT=51,...,67,91 INELASTIC. BASED ON STATISTICAL MODEL (REF. 3)
MT=102 CAPTURE. BASED ON STATISTICAL MODEL (REF. 3)
MT=251,252,253. DERIVED FROM MF=4,MT=1
MF=4
MT=2 ELASTIC BASED ON OPTICAL MODEL FOR POTENTIAL SCATTERING
ONLY
MT=16 (N,2N). ASSUMED ISOTROPIC
MT=18 FISSION ASSUMED ISOTROPIC.
MT=51,...,67,91 INELASTIC. ASSUMED ISOTROPIC
MF=5
MT=16 (N,2N) SIMPLE EVAPORATION MODEL
MT=18 FISSION. MAXWELLIAN WITH T=1.33 MEV
MT=91 CONTINUUM INELASTIC SIMPLE EVAPORATION MODEL
90-TH-230 INEL EVAL-AUG78 REICH
DATA ADDED TO THE FILE AT BNL BY R. KINSEY SEP78.
REFERENCES
1. S.F. MUGHABGHAB AND D.I. GARBER, BNL-325,VOL. 1 (1973),
BROOKHAVEN NATIONAL LABORATORY.
2. D.W. MUIR AND L.R. VESSER, LA-4648-MS (1971), LOS ALAMOS
SCIENTIFIC LABORATORY.
3. F.M. MANN AND R.E. SCHENTER, HEDL-TME-MM-KJ (1977) HANFORD
ENGINEERING DEVELOPMENT LABORATORY.
4. J.E. LYNN, G.D. JAMES, AND L.G. EARWARKER, NUCL. PHYS. A189
(1972) 225.
5. R.J. HOWERTON, NUCL. SCI. AND ENG. 62 (1977)438
6. R. SHER (PRIV. COMM., 1977)
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