Program - Brookhaven National Laboratory

channels, the only open channels. Experimental data below the Coulomb barrier are difficult to measure
and for this reason are scarce. In the rare earth region and particularly for the Samarium isotopes, there
are insufficient experimental data. In this work, the cross sections of (p,gamma) and (p,n) processes on
147,149 Sm were measured by gamma ray spectroscopy using the activation method. Proton beams of energies
between 3.5-8 MeV provided by the IFIN-HH Tandem accelerator, bombarded stacks of 147,149 Sm thin
targets. The induced activity was measured with a pair of large volume HPGe detectors in close geometry
in a special low background shielded area[1], thus allowing absolute cross section measurements down to
tens of microbarns. The results are compared with the predictions of the Hauser-Feshbach statistical model
calculations performed with the code EMPIRE 3.1 Rivoli. Different sets of optical model parameters were
used in the calculations.
[1] D. Filipescu et al., “Cross sections for α-particle induced reactions on 115,116 Sn around the Coulomb
barrier,” Phys. Rev. C 83, 064609 (2011)
Session DC Evaluated Nuclear Data Libraries
Monday March 4, 2013
Room: Empire East at 3:30 PM
DC 1 3:30 PM
New Version of Chinese Evaluated Nuclear Data Library CENDL-3.2 and the Development
Methodology of Nuclear Data Evaluation in China
Ge Zhigang, Wu Haicheng, Cheng Guochang, Xu Ruirui, Huang Xiaolong, Shu Nengchuan, Qian Jing,
Liu Ping
China Committee of Nuclear Data, China Nuclear Data Center, China Institute of Atomic Energy,
P.O.Box 275-1, Beijing 102413, P.R.China, Fax:+86-10-69358119
The CENDL-3.2 is general purpose evaluated nuclear data file which consists of the neutron reactions sublibrary,
the activation sub-library, decay data sub-library and fission yields sub-library. CENDL-3.2 can be
used for the nuclear engineering, nuclear medicine and nuclear science etc. fields. The CENDL-3.2 is based
on the previous version of CENDL and other special purpose libraries established by China Nuclear Data
Center(CNDC), the updated experimental information and new nuclear data evaluation methodologies.
The mainly contribution of CENDL-3.2 are being carried out at CNDC, China Institute of Atomic Energy
and China Nuclear Data Coordination Network(CNDCN). The nuclei region of the new neutron reactions
sub-library will be extend comparison with the CENDL-3.1 and the materials number will up to 300, which
can be covered almost needs for the nuclear engineering, nuclear power and related fields. The high fidelity
covariance files for some important structural materials, actinide and low fidelity covariance files for other
nuclei will be included in the sub-library. All the covariance files will be evaluated through a covariance
evaluation system COVAC developed by CNDC. The benchmark testing and validation for the CENDL-3.2
will be performed through the updated Evaluated Nuclear Data Integra Test System (ENDIST) established
at CNDC. Activation sub-library will contain the most important excitation functions for more than 600
nuclei which can be used for nuclear reactor design, operation and nuclear safety etc. Some of the evaluated
data will be obtained based on the updated measurements and mode calculations. Decay data sub-library
contains the updated decay information for more than 2000 nuclei, and more than 200 new evaluations
will be carried out by Chinese evaluators, other the data come from the new results of the NSDD. Fission
product yield sub-library will provide the evaluated fission yields by various methods for the neutron
introduced fissions for the U, Pu and Th etc. The progress of the evaluation methodologies during recent
years at CNDC and CNDCN will be introduced in this presentation.
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