Scientific and Technical Aerospace Reports Volume 38 July 28, 2000

isotopes. The method and program were successfully used to adjust the data of natural Fe and Fe-54,56,57,58 of CENDL-2.1, as
well as to adjust the data of natural Ni and its isotopes Ni-58,60,61,62,64.
NTIS
Nuclear Physics; Consistency; Cross Sections
20000063368 International Atomic Energy Agency, International Nuclear Data Committee, Vienna, Austria
Neutron activation cross section measurements and evaluations in CIAE
Huang Xiaolong,; Lu Hanlin,; Zhao Wenrong,; Yu Weixiang,; Han Xiaogang,; Oct. 31, 1998; 51p; In English
Report No.(s): DE99-607942; INDC(CPR)-045; No Copyright; Avail: Department of Energy Information Bridge
The cross sections of 28 reactions have been measured by the activation method since 1995 in CIAE. At the same time the
cross sections of 40 reactions which we have measured since 1989 have been compiled and evaluated. A brief description of experimental
measurement of activation cross sections is given. The data measured after 1995 by ourselves are listed in Table 4 and
our evaluations for 40 reactions are listed in Table 5, respectively. A graphical intercomparison with available experimental data
is given in appendix.
NTIS
Neutron Activation Analysis; Nuclear Physics
20000063369 International Atomic Energy Agency, International Nuclear Data Committee, Vienna, Austria
Benchmarking of evaluated neutron data for vanadium by a 14 MeV spherical shell transmission experiment
Simakov, S. P.; Devkin, B. V.; Fursov, B. I.; Kobozev, M. G.; Talalaev, V. A.; Oct. 31, 1998; 34p; In English
Report No.(s): DE99-607941; INDC(CCP)-417; No Copyright; Avail: Department of Energy Information Bridge
Measurements of neutron leakage spectra from two shells of pure vanadium having wall thicknesses of 3.5 cm and 10.5 cm
with a 14 MeV neutron source at the center are reported. The neutron leakage spectra were measured by the time-of-flight method
from 15 MeV down to 50 keV. Descriptions of the experimental arrangement, the time-of-flight spectrometer, the measurements
and data reduction procedures are given. Corrections connected with neutron multiple scattering in the neutron source, deviations
from spherical symmetry and others were estimated by the Monte-Carlo technique. Also, the response function of the spectrometer
was determined and folded with the calculated spectra to allow meaningful calculation-experiment comparisons even near the
14 MeV peak. Three-dimensional Monte-Carlo calculations were made with the MCNP code, using the EFF-3, FENDL-1 and
JENDL-FF nuclear data libraries. The total leakage fluence is correctly predicted or slightly overestimated by all these evaluated
data. However, its breakdown into energy bins shows considerable over estimations near 0.1 MeV for FENDL-1 and JENDL-FF
and near 10 MeV for JENDL-FF, while EFF-3 on the whole reproduces the leakage spectra best. An analysis of existing differential
experimental V(n,xn) data at 14 MeV incident energy agrees with these findings.
NTIS
Nuclear Physics; Neutron Sources; Neutron Spectra; Leakage
20000063370 International Atomic Energy Agency, International Nuclear Data Committee, Vienna, Austria
Status of experimental and evaluated discrete (gamma)-ray production at E(sub n)=14.5 MeV. Performed under the CRP
on measurement, calculation and evaluation of photon production data Final Report
Simakov, S. P.; Pavlik, A.; Vonach, H.; Hlavac, S.; Sep. 30, 1998; 60p; In English
Contract(s)/Grant(s): IAEA-7809/RB
Report No.(s): DE99-607938; INDC(CCP)-413; No Copyright; Avail: Department of Energy Information Bridge
The aim of the paper is to collect and examine the status of the experimental data on discrete (gamma)-ray production cross
sections via (n, x(gamma)) reaction for practically important nuclei at 14 MeV incident neutron energy. From this point of view,
the available experimental cross sections for all reliable (gamma)-ray transitions, measured by high energy resolution in- beam
technique, were compiled in the report. This experimental base was critically checked from the point of view of influence of different
experimental factors and evaluated experimental cross sections and uncertainties were received. The present status of experimental
data against practical demands was established. The FENDL-1, ENDF/B6 and BROND-2 libraries were checked as well
to search whether the discrete photon production cross sections were presented there and how they agree with available experimental
data.
NTIS
Nuclear Physics; Photons; Gamma Rays
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