24-CR- 52 NEDAC EVAL-MAR87 T.ASAMI(NEDAC)
DIST-MAR02 REV3-FEB02 20020214
----JENDL-3.3 MATERIAL 2431
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
87-03 New evaluation was made by T.Asami.
88-12 mf/mt=3/107 modified.
93-09 JENDL-3.2.
Compiled by T.Nakagawa (ndc/jaeri)
00-03 Reevaluation was made by T.Asami.
02-01 Compiled and modified by K.Shibata (ndc/jaeri)
***** modified parts for JENDL-3.3 ********************
(2,151) revised
(3,1) background cross section adpted below
855 keV
(3,2) re-calculated
(3,16,22,28,102,107) revised
(3,104,105,106,111,203,207) evaluated newly
(3,251) deleted
(4,2) transformation matrix deleted
(4,16,22,28,91) deleted
(5,16,22,28,91) deleted
(6,16,22,28,91) taken from JENDL fusion file
(6,203, 207) taken from JENDL fusion file
(12,16-107) evaluated newly
(14,16-107) isotropic distribution
(15,16-107) evaluated newly
(33,1-107) taken from JENDL-3.2 covariance file
(34,2) taken from JENDL-3.2 covariance file
***********************************************************
02-02 Covariances for mf/mt=3/16 were estimated by T. Asami.
mf=1 General information
mt=451 Descriptive data and dictionary
mf=2 Resonance parameters
mt=151 Resolved resonance parameters
Resolved parameters for Reich-Moore formula were given in the
energy region from 1.0e-5 eV to 855 keV. Evaluated mainly based
Allen+77/6/, Kenny+77/7/, Agrawal+84/8/, Brusegan+86/9/ and
Rohr+89/10/
Effective scattering radius = 5.2 fm /10/
calculated 2200 m/s cross sections and resonance integral
2200 m/s cross section(b) res. integral(b)
elastic 3.03
capture 0.78 0.47
total 3.80
mf=3 Neutron cross sections
Below 855 keV, background cross section was given.
Above 855 keV, the total and partial cross sections were given
pointwise.
mt=1 Total
Below 855 keV, given by the resonance parameters and the back-
ground cross section determined so as to reproduce the experi-
mental data of elemental Cr.
Above 855 keV, optical and statistical model calculation was
made with the casthy code/11/.
The optical potential parameters used are
V = 46.78 - 0.262*En, Vso = 7.0 (MeV)
Ws = 4.87 + 0.352*En, Wv = 0 (MeV)
r = 1.30, rs = 1.40, rso = 1.30 (fm)
a = 0.55, b = 0.40, aso = 0.48 (fm)
Surface imaginary part is in derivative Woods-Saxon form.
mt=2 Elastic scattering
Obtained by subtracting the sum of the partial cross sections
from the total cross section.
mt=4, 51-62, 91 Inelastic scattering
Calculated with the casthy code/11/, taking account of the
contribution from the competing processes and using the
discrete level data/3/ shown below. The contributions from
the direct process for the levels marked with '*' were
calculated with the dwuck code/12/. The deformation parameters
used in the calculation were assumed based on a weak coupling
model.
level energy(MeV) spin-parity
g.s. 0.0 0+
1 1.4341 2+ *
2 2.3696 4+ *
3 2.6470 0+
4 2.7677 4+
5 2.9648 2+ *
6 3.1138 6+ *
7 3.1617 2+ *
8 3.4152 4+
9 3.4722 3+
10 3.6158 5+
11 3.7000 2+
12 3.7717 2+
Levels above 3.8 MeV were assumed to be overlapping.
The data of mt=51 and 52 were modified by considering experi-
mental data. The total inelastic scattering cross section
(mt=4) is the sum of mt's from 51 to 91.
(n,n') continuum cross section (mt=91) in the whole energy
region and its spectra were taken from the sincros-ii/2/ cal-
culation. Several discrete level scattering cross sections
(mt=63, 64, 65, 66) and their angular distribution were delet-
ed because they were included in the new continuum inelastic
scattering cross section(mt=91) taken from the sincros-ii
calculation. The threshold of mt=91 was changed from 4.65 MeV
to 3.8 MeV.
Optical-model, level density and other parameters used in the
sincros-ii calculation are described in ref./2/.
Level schemes were determined on the basis of ENSDF/3/.
mt=16 (n,2n)
Calculated with the egnash code/2/ to reproduce the experi-
mental data of Wenusch+62/13/, Molla+83/14/,Ribansky+85 /15/,
Qaim72/16/, Sailer+77/17/, Ikeda+88/18/, Liskien+89/19/ and
Wagner+89/20/
mt=22 (n,na)
Obtained from from the sincros-ii calculation made with the
with the egnash code/2/.
mt=28 (n,np)
Obtained from from the sincros-ii calculation made with the
with the egnash code/2/.
mt=102 capture
Below 855 keV, created from the resonance parameters.
Above 855 keV,calculated with the casthy code/11/ and normali-
zed to 28.5 mb at 50 keV so as to reproduce the element data
of 10 mb, and added the semidirect component calculated with
the quick gnash code/28,29/.
mt=103 (n,p)
Calculated with the gnash code/2/ and normalized at 14.8 MeV
to the recommended value of Forrest/22/.
mt=104 (n,d)
Obtained from from the sincros-ii calculation made with the
the egnash code/2/.
mt=105 (n,t)
Obtained from from the sincros-ii calculation made with the
the egnash code/2/.
mt=107 (n,a)
Calculated with the egnash code/2/ to reproduce the experi-
mental data at 14.8 MeV/23,24/.
mt=106, 111 (n,He-3), (n,2p)
obtained from from the sincros-ii calculation made with the
the egnash code/2/.
mf=4 Angular distributions of secondary neutrons
mt=2 Elastic scattering
Calculated with the casthy code/11/.
mt=51-62 Inelastic scattering
Calculated with the casthy code/11/ and the dwuck code/12/.
mf=6 Energy-angle distributions of secondary neutrons
mt=16, 22, 28, 91
The data were created by f15tob program/1/.Modified Kumabe's
systematics/26/ was used. The precompound/compound ratio was
taken from the sincros-ii calculation/2/, based on modified
Kumabe's systematics/1/.
mt=203, 207
Based on Kalbach's systematics/26/.
mf=12 Photon production multiplicities and transition probability
arrays
mt=16, 22, 28, 51-62, 91,103, 104, 107
mt=51-16 were given as the transition probability arrays.
mt=16, 22, 28, 91, 102, 103, 104, 107 were calculated with
the egnash code/2/ and processed by the gamfil2 code/25/.
mt=102 was calculated with the casthy code/11/.
mf=14 Photon angular distributions
mt=16, 22, 28, 51-62, 91, 102, 103, 104, 107
Assumed to be isotropic distributions
mf=15 Continuous photon energy spectra
mt=16, 22, 28, 91, 103, 104, 107
Calculated with the egnash code/2/.
mt=102
Calculated with the casthy code/11/. the spectra at 31 to
545 keV were modified based on the experimental data of
Igashira/27/.
mf=33 Covariances of cross sections (ref.30)
mt=1
Based on experimental data. A chi-value was 6.2.
mt=2
Constructed from mt=1, 16, 22, 28, 51-91, 102, 103, and 107.
mt=4
Constructed from mt=51-62,91.
mt=16
Based on experimental data. A chi-value was 2.122.
The analysis was done by T. Asami /31/.
mt=22
The covariances were obtained by using kalman. A chi-value
was 1.84.
mt=28
The covariances were obtained by using kalman. A chi-value
was 1.84.
mt=51-62,91
The covariances were obtained by using kalman. A chi-value
was 12.1.
mt=102
The covariances were obtained by using kalman. A chi-value
was 0.8.
mt=103
The covariances were obtained by using kalman. A chi-value
was 1.84.
mt=107
The covariances were obtained by using kalman. A chi-value
was 1.84.
mf=34 Covariances of angular distributions (ref.30)
mt=2
The covariances of p1 coefficients were obtained by using
kalman. a chi-value was 1.4
References
1) Chiba S. et al.: JAERI-M 92-027, p.35 (1992).
2) Yamamuro N.: JAERI-M 90-006 (1990).
3) ENSDF: Evaluated Nuclear Structure Data File, BNL/NNDC.
4) Stiegliz R.G. et al.: Nucl. Phys. A163, 592 (1971).
5) Beer H. and Spencer R.P.: KfK-2063 (1974), also Nucl. Phys.
A240, 29 (1975).
6) Allen B.J. and Musgrove A.R.de L.: Neutron Data of Structural
Materials for FBR, 1977 Geel meeting, p.447, Pergamon Press
(1979).
7) Kenny M.J. et al.: AAEC/E-400 (1977).
8) Agrawal H.M. et al.: Phys. Rev. C30, 1880 (1984).
9) Brusegan A. et al.: 85 Santa Fe Vol.1 p.633 (1986).
10) Mughabghab S.F. et al.: "Neutron Cross Sections", Vol.1,
Part A (1981).
11) Igarasi S. and Fukafori T.: JAERI 1321 (1991).
12) Kunz P.D.: unpublished.
13) Wenusch R. et al.: OSA 99, 1 (1962).
14) Molla N.T. et al.: INDC(BAN)-002,1 (1983).
15) Ribansky I. et al.: ANE 12, 577 (1985).
16) Qaim S.M.: Nucl. Phys. A185, 614 (1972).
17) Sailer K. et al.: 1977 Kiev Conf. Vol.1, 246 (1977).
18) Ikeda Y. et al.: JAERI-1312 (1988).
19) Liskien H. et al.: EXFOR data (1989).
20) Wagner M. et al. : ANE 16,623 (1989).
21) Young P.G. and Arthur E.D.: LA-6947 (1977).
22) Forrest R.A.: AERE-R-12419 (1986).
23) Grimes S.M. et al.: Phys. Rev. C19, 2127 (1979).
24) Dolja G.D. et al.: 1973 Kiev Conf. Vol.3, 131 (1973).
25) Hida K.: JAERI-M 86-150 (1986) (in Japanese).
26) Kalbach C. : Phys. Rev. C37, 2350(1988).
27) Igashira M. et al.: Private communication (1999) .
28) Young P.G. et al. : LA-12343-MS (1992).
29) Koning A.J. and Delaroche J.P. : ECN-RX-98-015 (1998).
30) Shibata K. and Oh S.Y.: JAERI-Research 2000-007 (2000).
31) Asami T.: Private communication (2002).