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Title:
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Neutron and proton transmutation-activation cross section libraries to 150 MeV for application in accelerator-driven systems and radioactive ion beam target-design studies
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Author(s):
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Published by:
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Publication date:
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ECN
NUC
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1998
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ECN report number:
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Document type:
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ECN-R--98-012
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Other
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Number of pages:
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Full text:
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120
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Download PDF
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Abstract:
New transmutation-activation nuclear data libraries for neutrons andprotons up to 150 MeV have been created. These data are important for
simulation calculations of radioactivity, and transmutation, in
accelerator-driven systems such as the production of tritium (APT) and the
transmutation of waste (ATW). They can also be used to obtain cross section
predictions for the production of proton-rich isotopes in (p,xn) reactions,
for radioactive ion beam (RIB) target-design studies. The nuclear data in
these libraries stem from two sources: for neutrons below 20 MeV, we use data
from the European activation and transmutation file, EAF97; For neutrons
above 20 MeV and for protons at all energies we have isotope production cross
sections with the nuclear model code HMS-ALICE. This code applies the Monte
Carlo Hybrid Simulation theory, and the Weisskopf-Ewing theory, to calculate
cross sections. In a few cases, the HMS-ALICE results were replaced by those
calculated using the GNASH code for the Los Alamos LA150 transport library.
The resulting two libraries, AF150.N and AF150.P, consist of 766 nuclides
each and are represented in the ENDF6-format. An outline is given of the new
representation of the data. The libraries have been checked with ENDF6
preprocessing tools and have been processed with NJOY into libraries for the
Los Alamos transmutation/radioactivity code CINDER. Numerous benchmark
figures are presented for proton-induced excitation functions of various
isotopes compared with measurements. Such comparisons are useful for
validation purposes, and for assessing the accuracy of the evaluated data.
These evaluated libraries are available on the WWW at: http://t2.lanl.gov/.
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