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18-Ar- 38 NEA RCOM-JUN83 SCIENTIFIC CO-ORDINATION GROUP
DIST-JAN09 20090105
----JEFF-311 MATERIAL 1831
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
*************************** JEFF-3.1.1 *************************
** **
** Original data taken from: JEFF-3.1 **
** **
******************************************************************
***************************** JEFF-3.1 *************************
** **
** Original data taken from: JEFF-3.0 **
** **
******************************************************************
***************************** JEFF-3.0 *************************
Skeleton MF-5 MT-22,28 added
DATA TAKEN FROM :- JEF-2.2 (DIST-JAN92)
******************************************************************
* JEF-2 *
* DATA WERE TAKEN FROM RCN-2 EVALUATION. *
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* 23-AUG-84: COMMENT ADDED. Q-VALUES IN MF=3,MT=91 *
* AND IN MF=5,MT=16 CORRECTED. *
* 3-FEB-85: DATA WERE EXTENDED DOWN TO 1.0E-5 EV
* AFTER CONSULTAION WITH H.GRUPPELAAR.
* 11-FEB-85: Q-VALUES AND THRESHOLD ENERGIES FOR MT=22, 28,
* 107, 108 CORRECTED
Q-VALUE FOR MT=102 CORRECTED
******************************************************************
ARGON-38
AUTOMATICALLY TRANSLATED INTO ENDF/B FORMAT FROM KEDAK SOURCE BY
K T O E - 3
ORIGINAL COMMENT IS:
ECN-3 EVAL. H.GRUPPELAAR AND H.A.J.VAN DER KAMP 18/02/82
MINIMUM ENERGY .00100 EV
MIN EN OF STATISTICAL MODEL .30000 MEV
ENERGY OF FIRST EXCITED STATE 2.16800 MEV
CONTINUOUS STAT MODEL ABOVE 5.97480 MEV
HIGH ENERGY MODEL ABOVE 11.00000 MEV
MAXIMUM ENERGY 20.00000 MEV
LEVEL DENSITY PARAMETER AR038 7.15000 1/MEV
LEVEL DENSITY PARAMETER AR037 6.46000 1/MEV
*****CROSS SECTIONS FOR NUCLIDES IN COVER GAS OF LMFBR**********
*****ARGON-38***************************************************
RESOLVED RESONANCE REGION
THERMAL CAPTURE CROSS SECTION = 0.8+-0.2 BARN (MU73)
RESONANCE INTEGRAL: NO MEASURED VALUE KNOWN
RESOLVED RESONANCE PARAMETERS: ONLY TWO HYPOTHETICAL
RESONANCES, ONE NEGATIVE AT -4960 EV, ONE POSITIVE AT
135 KEV, FITTED TO THE VALUE OF THE THERMAL CAPTURE
CROSS SECTION.
STRENGTH FUNCTION REGION UP TO 1.2 MEV.
CAPTURE CROSS SECTIONS WITH CODE FISPRO-ECN
OTHER CROSS SECTIONS WITH CODE SASSI-ECN
S-WAVE STRENGTH FUNCTION=0.91, P-WAVE STRENGTH FUNCTION
=0.33, THE SAME VALUES AS USED FOR ARGON-40
OTHER STRENGTH FUNCTIONS FROM OPTICAL MODEL
DOBS=140 KEV ,FROM BECKERMANN (BE77)
S-WAVE CAPTURE WIDTH=0.357 EV,
P-WAVE CAPTURE WIDTH=0.638 EV, CALCULATED WITH CERBERO
HIGH ENERGY REGION ABOVE 1.2 MEV.
ALL CROSS SECTIONS WITH CODE SASSI-ECN
OPTICAL MODEL PARAMETERS FROM WIEDLING ET AL.(WI76)
LEVEL SCHEME OF TARGET NUCLEUS FROM ENDT ET AL.(EN78)
SQUARED SPIN CUTOFF PARAMETER=4.65 FROM EXPERIMENTAL SPIN
DISTRIBUTION
CHARGED PARTICLE EMISSION CROSS SECTION FROM CERBERO,ERINNI
AND THRES-2 RENORMALIZED AT 14.5 MEV (QA78) WHERE POSSIBLE.
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