  Multiple isotopes of samarium element are the isotopes produced by the s
process, and 154Sm is produced by the r process. In addition, 144Sm is p nuclei
in nuclear astrophysics. The measurement of these can help us to better
understand the results of relevant photonuclear reaction experiments. On the
other hand, 149Sm is a 235U fission product with a 1% yield, its cross sections
are important to reactor neutronics. In this work, the neutron capture yield of
the natural samarium target was measured at the back-streaming white neutron
beamline (Back-n) of the China Spallation Neutron Source (CSNS), and the
resonance parameters were analyzed by SAMMY code. The resonance peaks and the
neutron separation energies contributed by the different isotopes are
considered individually. The results of the capture yield found signs of the
possibility of two resonance peaks at 8 eV, which awaits further experimental
examination. Cross-section was calculated according to resonance parameters and
was compared with other experimental results and evaluation databases of
ENDF/B-VIII.0 and CENDL-3.2. A clear difference between ENDF/B VIII.0 and
CENDL-3.2 database appears at 23.2 eV, the experimental result at this energy
is smaller than data of ENDF/B VIII.0 database but CENDL-3.2 database. Most of
the controversial experimental results invariably come from the samarium 149
isotope.
