1-H - 1 JAERI EVAL-DEC84 K.SHIBATA
JAERI-1261 DIST-MAR02 REV3-FEB02 20020214
----JENDL-3.3 MATERIAL 125
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
83-03 Compiled by K.Shibata for JENDL-2
Main part was carried over from JENDL-1 data evaluated by
M.Yamamoto. Details are given in ref. /1/.
83-11 mf=2 was added. The transformation matrix given for mt=2 of
mf=4.
84-12 Re-evaluated by K.Shibata (jaeri) for JENDL-3
Elastic scattering cross section was re-calculated below
100 keV.
mu-bar was also re-calculated.
Photon-production cross section was added.
93-04 JENDL-3.2 compiled by T.Nakagawa (ndc/jaeri)
***** modified parts for JENDL-3.2 ********************
(4,2) transformation matrix
***********************************************************
02-01 Compiled by K.Shibata for JENDL-3.3.
***** modified parts for JENDL-3.3 ********************
(1,451) Updated.
(3,251) Deleted.
(4,2) Transformation matrix deleted.
The first 100 keV distribution was
changed to that at 99 keV in order to
remove an error by mcnp.
(33,1-102) Taken from JENDL-3.2 covariance file.
***********************************************************
mf=1 General information
mt=451 Descriptive data and dictionary
mf=2 Resonance parameters
mt=151 Scattering radius only
mf=3 Neutron cross sections
Calculated 2200m/s cross sections and res. integrals
2200m/s (b) res. integ. (b)
total 20.806 -
elastic 20.474 -
capture 0.332 0.1491
mt=1 Total cross section
Sum of elastic and capture cross sections
mt=2 Elastic scattering cross section
Below 100 keV, calculated by using effective range and
scattering length parameters of Poenitz and Whalen /2/.
Above 100 keV, the data of Hopkins and Breit/3/ were
recommended.
mt=102 Capture cross section
The data of Horsley/4/ were recommended.
mf=4 Angular distributions of secondary neutrons
mt=2
Below 100 keV, isotropic in the center of mass system was
assumed. Above 100 keV, the data of Hopkins and Breit/3/
were recommended.
mf=12 Photon production multiplicity
mt=102
m=1.0
mf=14 Photon angular distribution
mt=102
Assumed to be isotropic.
mf=33 Covariances of cross sections
mt=1
Sum of mt=1 and 102.
mt=2
Based on ENDF/B-V except that the standard deviation
below 1 keV was changed to 0.1%.
mt=102
Standard deviations are 0.5% below 1 keV and 2.0% above
1 keV./5/
References
1) Igarasi S. et al.: JAERI-1261 (1979).
2) Poenitz W.P. and Whalen J.F.: Nucl. Phys. A383 (1982) 224.
3) Hopkins J.C. and Breit G.: Nucl. Data Table A9(1971) 137.
4) Horsley A.: Nucl. Data A2(1966) 243.
5) Shibata K. et al.: JAERI-Research 96-041 (1996) [in Japanese].