Program - Brookhaven National Laboratory

Measurement of Activation Cross Sections of Erbium Irradiated by Proton Beam
Tae-Yung Song, Jong Woon Kim, Hyeong Il Kim, Cheol Woo Lee and Young-Ouk Lee, Korea Atomic
Energy Research Institute. Sung-Chul Yang , Kwangsoo Kim and Guinyun Kim, Kyungpook National
University.
Erbium is one of the rare earth elements which are used to produce therapeutic radioisotopes by charged
particle induced reactions. Charged particles such as proton, deuteron and alpha particle can be used
for the production of therapeutic radioisotopes. In this study, activation cross sections were measured for
erbium sample irradiated by proton beams. MC-50 cyclotron of KIRAMS (Korea Institute of Radiological
and Medical Sciences) was used for the irradiation of proton beams with energy up to 42 MeV. Radioactive
nuclides are produced and decay to yield gamma rays with specific energies. A HPGe detector was used
to measure gamma ray energies for the activation cross section measurement. A stacked foil technique was
adopted to measure the activation cross sections at different proton energies. The thickness of erbium foil
was 25 microns. Copper foil was used as a monitor foil to measure proton beam current. SRIM code was
used to calculate energies of proton beams penetrating each foil. The measured data was compared with
other available experimental data. The measured data was also compared with theoretical cross sections
calculated based on TALYS code.
PR 62
Measurement of the 54,57 Fe (n,γ) Cross Section in the Resolved Resonance Region at CERN
n TOF
G. Giubrone, C. Domingo Pardo, J.L. Tain Enriquez, IFIC Valencia, Edificio Institutos de Investigación.
c/ Catedrático José Beltràn, 2. E-46980 Paterna - España.
The accurate measurement of neutron capture cross section of the stable Fe isotopes is important for
disentangling the contribution of the s-process and the r-process to the stellar nucleosynthesis of elements
in the mass range 60 < A < 120. At the same time, Fe is an important component of structural materials
and improved neutron cross section data is relevant for the reliable design of new nuclear power systems.
This contribution presents the final results for 54,57 Fe (n,γ) measured at CERN n TOF in the energy range
from 1 eV to 1 MeV using two C6D6 detectors in combination with the pulse height weighting technique.
A comparison of the n TOF results versus previous measurements and nuclear data evaluation will be also
reported.
Corresponding author: Jose Luis Tain
PR 63
Total Neutron Cross Section Measurements of 27 Al, 12 C and 238 U on Filtered Neutron
Beams of 54 keV and 148 keV
T. T. Anh, P. N. Son, Nuclear Research Institute, Dalat, Vietnam.. P. D. Khang, Vietnam Atomic
Energy Institute, Hanoi, Vietnam.. V. H. Tan, Vietnam Agency for Radiation and Nuclear Safety,
Hanoi, Vietnam..
Neutron filter technique was used to produce quasi-monoenergetic neutrons of 54 keV and 148 keV on
horizontal channel of Dalat Research Reactor. Total neutron cross sections of 27 Al, 12 C and 238 U have been
measured on those neutron energies by transmission technique using a gas-filled proton-recoil spectrometer.
Simulations of total neutron cross sections and self shielding effect with different target thicknesses were
also taken into account by MCNP code. The obtained data of 27 Al, 12 C and 238 U are in good agreement
with experimental ones from other authors and evaluated values of JENDL-4.0 and ENDF/B-VII.0.
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