Publications (1)0 Total impact
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H. Matsumura,
N. Kinoshita,
H. Iwase,
A. Toyoda, Y. Kasugai,
N. Matsuda,
Y. Sakamoto,
H. Nakashima,
H. Yashima,
N. Mokhov,
A. Leveling,
D. Boehlein,
K. Vaziri,
G. Lautenschlager,
W. Schmitt,
K. Oishi
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ABSTRACT: In an antiproton production (Pbar) target station of the Fermi National
Accelerator Laboratory (FNAL), the secondary particles produced by bombarding a
target with 120-GeV protons are shielded by a thick iron shield. In order to
obtain experimental data on high-energy neutron transport at more than
100-GeV-proton accelerator facilities, we indirectly measured more than 100-MeV
neutrons at the outside of the iron shield at an angle of 50{\deg} in the Pbar
target station. The measurement was performed by using the Au activation method
coupled with a low-background {\gamma}-ray counting system. As an indicator for
the neutron flux, we determined the production rates of 8 spallation nuclides
(196-Au, 188-Pt, 189-Ir, 185-Os, 175-Hf, 173-Lu, 171-Lu, and 169-Yb) in the Au
activation detector. The measured production rates were compared with the
theoretical production rates calculated using PHITS. We proved that the Au
activation method can serve as a powerful tool for indirect measurements of
more than 100-MeV neutrons that play a vital role in neutron transport. These
results will be important for clarifying the problems in theoretical
calculations of high-energy neutron transport.
05/2012;
