28-Ni- 60
28-NI- 60 NAIG EVAL-MAR87 S.IIJIMA
DIST-MAR02 REV4-MAY00 20020214
----JENDL-3.3 MATERIAL 2831
-----INCIDENT NEUTRON DATA
------ENDF-6 FORMAT
HISTORY
87-03 Evaluation was performed for JENDL-3. Short description
on the evaluation is given in ref./1/
87-05 Compiled by K.Shibata (jaeri).
90-10 mf=5, mt=16, 22 and 28: data at threshold energies were
modified. mf=12, mt=16, 91 and 102 were slightly modified.
93-09 JENDL-3.2.
Compiled by T.Nakagawa (ndc/jaeri)
***** modified parts for JENDL-3.2 ********************
(4,16-28), (4,91) Taken from JENDL fusion file
(5,16-91) Taken from JENDL fusion file
(12,102) Below 500 keV, revised by S.Igasasi
(15,102) Below 500 keV, revised by S.Igarasi
***********************************************************
-------------------------------------------------------------
JENDL fusion file /2/ (as of Sep. 1993)
Evaluated by S.Chiba (ndc/jaeri)
Compiled by S.Chiba
All of cross sections were taken from JENDL-3.1. EDX's
of mt=16, 22, 28 and 91 were replaced by those calculated
with sincros-II code system/3/ because normalization
errors were found in the data stored in JENDL-3.1. DDX's
of continuum reactions were created with f15tob program
/2/. Kumabe's systematics /4/ was used. The precom-
pound/compound ratio was calculated by the sincros-II code
system.
Optical-model, level density and other parameters used
in the sincros-ii calculation are described in ref./3/.
Level schemes were determined on the basis of ENSDF/5/.
-------------------------------------------------------------
2000-05 Re-evaluated by N.Yamamuro (TIT), and compiled by
K.Shibata (jaeri).
*************** modification for JENDL-3.3 **************
(3,1) Re-evaluated above 557 keV
(3,2) Re-calculcated.
(3,16),(3,22),(3,28), Calculated by sincros-II
(3,103),(3,104),(3,105), Calculated by sincros-II
(3,106),(3,107), Calculated by sincros-II
(3,203),(3,204),(3,205) Calculated by sincros-II
(3,206),(3,207) Calculated by sincros-II
(4,16),(4,22),(4,28),(4,91) Deleted
(5,16),(5,22),(5,28),(5,91) Deleted
(6,16),(6,22),(6,28),(6,91) Taken from JENDL fusion file
(6,203),(6,204),(6,205), Taken from JENDL fusion file
(6,206),(6,207) Taken from JENDL fusion file
*********************************************************
2002-01 Covariances were taken from the work of Shibata and
Oh./19/
mf=1,mt=451 Comments and dictionary
mf=2,mt=151 Resolved resonance parameters : 1.0e-5 eV - 456 keV
Evaluation based on the following data.
Parameters in JENDL-2 were modified with the data of
Perey et al./6/ Two negative resonances were added.
E = -50 keV gamma-n = 12.8 keV gamma-g = 0.0 eV
E = -656 eV gamma-n = 0.60 eV gamma-g = 6.0 eV
calculated 2200 m/s values and resonance integrals (barn):
2200 m/s value res. int.
total 4.316 -
elastic 1.416 -
capture 2.900 1.462
mf=3 Neutron cross sections
No background cross sections are given below 456 kev for mt=1,
2, 102. Cross sections above 456 keV were evaluated as follows:
mt=1 : Total cross section
High resolusion experimental data of Perey et al./6/ were
traced up to 557 keV. Above 557 keV, evaluation was
based on the natural Ni data measured by Larson et al.
/7/ with unfolding considering experimental resolution.
mt=2 : Elastic scattering
(total) - (nonelastic cross sections).
mt=3 : Nonelastic cross section
Sum of mt=4,16,22,28,102,103,104,105,106,107,111.
mt=16 : (n,2n)
Evaluated by N.Yamamuro using sincros-II code /8/.
mt=22,28,103,104,105,106,107: (n,n'a),(n,n'p),(n,p),(n,d),
(n,t),(n,he-3),(n,a)
Evaluated by N.Yamamuro using sincros-II code /8/.
mt=111 : (n,2p)
The cross sections were calculated with pegasus/9/. The
(n,a), (n,na) and (n,d) cross sections were normalized to
the data of Grimes et al./10/ and the (n,t) was to the
data of Qaim and Stoecklin/11/ Inverse cross sections
were calculated from the following omp's:
proton = Perey/12/
alpha = Huizenga and Igo/13/
deuteron = Lohr and Haeberli/14/
helium-3 and triton = Becchetti and Greenlees/15/
mt=4,52-61,91 : Inelastic scattering
The casthy /16/ and gnash /17/ calculations were adopted
for neutron energies below and above 7 MeV, respectively.
The contribution from the direct process was included for
mt=51, 52, 53, 54, 61. for the level of mt=61, only the
direct process was considered. The level scheme used is
as follows:
no energy(MeV) spin-parity
g.s 0.0 0 +
1. 1.3325 2 +
2. 2.1588 2 +
3. 2.2849 0 +
4. 2.5058 4 +
5. 2.6260 3 +
6. 3.1198 4 +
7. 3.1240 2 +
8. 3.1861 3 +
9. 3.1941 1 +
10. 3.2696 2 +
11. 4.0397 3 -
Continuum levels assumed above 3.318 MeV.
Potential parameters are given as follows /18/:
V =51.33 - 0.331*En ,Ws=8.068 + 0.112*En ,Vso=7.0 (MeV)
r0=rso=1.24 ,rs=1.40 (fm)
a0=aso=0.541 ,as=0.4 (fm)
Surface imaginary part is in derivative Woods-Saxon form.
mt=102 : Capture
Calculated with casthy by normalizing to 8.0 mb at 700
keV /6/. Gamma-ray strength function is 2.925e-5. Level
density parameters are:
pairing spin-cutoff f.
a(1/MeV) T(MeV) energy(MeV) (MeV**0.5) Ex(MeV)
-------------------------------------------------------------
Ni-60 7.700 1.15 2.47 6.209 8.75
Ni-61 8.355 1.15 1.20 6.540 8.39
-------------------------------------------------------------
mt=203,204,205,206,207
Calculated from the cross sections mentioned above.
mf=4 Angular distributions of secondary neutrons
mt=2 : Calculated with optical model.
mt=51-60 : calculated with casthy. direct process
included in mt=51, 52, 53, 54
mt=61 : c.c. calculation.
mf=6 Energy-angle distributions of secondary particles
mt=16,22,28,91: Taken from JENDL fusion file.
mt=203,204,205,206,207: Taken from JENDL fusion file
mf=12 Photon multiplicities and transition probability arrays
mt=16,22,28,91,103,107:
Multiplicities calculated with gnash.
mt=102 : Multiplicities calculated from energy balance.
mt=51-61 : Transition probability arrays
mf=14 Photon angular distributions
mt=16,22,28,51-61,91,102,103,107
Isotropic distributions.
mf=15 Photon energy distributions
mt=16,22,28,91,102,103,107:
Calculated with gnash. For mt=102, spectra at 1.0e-5,
2.53e-2, 1.0e+3 and 1.0e+4 eV were calculated with
casthy, taking primary transitions.
In JENDL-3.3, for mt=102, the spectra above 1.0e+5 eV
were replaced with new calculations /8/.
mf=33 Covariances of cross sections (ref.19)
mt=1
Based on experimental data. A chi-value was 2.99.
mt=2
Constructed from mt=1, 16, 22, 28, 51-91, 102, 103, 104, 105,
and 107.
mt=4
Constructed from mt=51-61,91.
mt=16
The covariances were obtained by using kalman.
A chi-value was 3.96.
mt=22, 28, 104, 105, 107
The covariances were obtained by using kalman. A chi-value
was 3.96.
mt=51-61, 91
The covariances were obtained by usign kalman. A chi-value
was 3.1.
mt=102
The covariances were obtained by usign kalman. A chi-value
was 0.8.
mt=103
Based on experimental data. A chi-value was 3.2.
mf=34 Covariances of angular distributions (ref.19)
mt=2
The covariances of p1 coefficients were obtained by using
kalman. A chi-value was 0.84.
References
1) Iijima S. et al.: Proc. Int. Conf. Nuclear Data for Science
and Technol., Mito, 1988, p.627 (1988).
2) Chiba S. et al.: JAERI-M 92-027, p.35 (1992).
3) Yamamuro N.: JAERI-M 90-006 (1990).
4) Kumabe I. et al.: Nucl. Sci. Eng., 104, 280 (1990).
5) ENSDF: Evaluated Nuclear Structure Data File, BNL/NNDC.
6) Perey C.M. et al.: ORNL-5893 (1982) and Phys. Rev., C27, 2556
(1983).
7) Larson D.C. et al.: ORNL-TM-8203 (1983).
8) Yamamuro N.: Private communication (2000).
9) Iijima S. et al.: JAERI-M 87-025, p.337 (1987).
10) Grimes S.M. et al.: Phys. Rev., C19, 2127 (1979).
11) Qaim S.M. and Stoecklin G.: Nucl. Phys., A257, 233 (1976).
12) Perey F.G: Phys. Rev. 131, 745 (1963).
13) Huizenga J.R. and Igo G.: Nucl. Phys. 29, 462 (1962).
14) Lohr J.M. and Haeberli W.: Nucl. Phys. A232, 381 (1974).
15) Becchetti F.D., Jr. and Greenlees G.W.: Polarization
Phenomena in Nuclear Reactions ((eds) H.H.Barshall and
W.Haeberli), p. 682, the University of Wisconsin Press (1971).
16) Igarasi S. and Fukahori T.: JAERI 1321 (1991).
17) Young P.G. and Arthur E.D.: LA-6947 (1977).
18) Kawai M. : unpublished.
19) Shibata K. and Oh S.Y.: JAERI-Research 2000-007 (2000).